249results about How to "Increase the number of reuses" patented technology

The invention provides a measuring instrument with an optical fiber Mach-Zehnder interferometer and optical fiber Michdson interferometer arrays, which comprises a broad-band light source 1, a photoelectric detector 2, a 3dB optical fiber 2 multiplied by 2 coupler 3, the optical fiber Mach-Zehnder interferometer, a transposed 3dB optical fiber 2 multiplied by 2 coupler 7, optical fiber Michdson interferometers arrays 8 and 8', and a single-mode connecting optical fiber 9, wherein, the optical fiber Mach-Zehnder interferometer consists of an attenuator 4, a self-focusing lens 5, an axicon lens 6 with total reflection angle, and the connecting optical fiber 9. The measuring instrument with the optical fiber Mach-Zehnder interferometer and the optical fiber Michdson interferometer arrays utilizes a technique that measures strain and temperature at the same time, realizes the temperature compensation technique and the array arrangement of optical fiber sensors, realizes absolute measurement under the situation that the multiple sensors are not interfered by each other, lowers the cost of single-point measurement and ensures real-time measurement; furthermore, the measuring instrument has simple techniques and easy implementation, and as standard optical fiber communication elements are adopted as the optical fiber materials and devices, the measuring instrument has low cost, easy acquisition of the optical fiber materials and devices and easy popularization.

The invention discloses a water-based mold release and a preparation method thereof and release paper prepared by utilizing the water-based mold release. The mold release comprises the following raw materials by weight: 1 to 50 parts of organosilicone monomer, 1 to 50 parts of vinyl end-capping agent, 1 to 50 parts of alkyd resin, 1 to 10 parts of emulsifying agent, 1 to 10 parts of catalytic agent, 100 to 160 parts of deionized water, 0.1 to 10 parts of pH value conditioning agent, 1 to 10 parts of cross-linking agent and 0.01 to 1 part of platinum-based catalytic agent. The mold release has the advantages that the raw materials are cheap and easy to get; the preparation method is simple; the used mold release layer takes water as a dispersing agent; no organic solvent is released; the mold release is safe and environment-friendly; the release paper prepared by utilizing the mold release is short in thermosetting time, and is suitable for industrialized production; the prepared release paper is good in property.

The invention relates to a preparation method of a magnetic carbon-based solid acid catalyst with a core-shell structure. The preparation method comprises the following steps: preparing magnetic particles Fe3O4 by a coprecipitation method, adding a buffer agent and an anionic surfactant into the magnetic particles Fe3O4, modifying the size and the surface characteristic of the magnetic particles Fe3O4 to obtain magnetic powder Fe3O4, then grinding and mixing the magnetic powder Fe3O4 and a biobased material, and performing carbonization at the temperature of 350 to 550 DEG C under an N2 protection atmosphere for 2 to 6 h; grinding and pulverizing a carbonized mixture, adding a sulfonating agent for sulfonation at the temperature of 60 to 160 DEG C for 5 to 15 h to obtain a mixture, and performing adsorption with an external magnet, washing and drying to obtain the magnetic carbon-based solid acid catalyst with the core-shell structure. The preparation process disclosed by the invention is simple in process; the prepared catalyst is high in magnetism, high in activity, easy to recycle, high in stability and high in reusability, and is high in catalysis activity in the reaction of preparing fermentable sugars by catalyzing the depolymerization of a lignocelluloses biomass raw material.

The invention provides a double reference length low coherent optical fiber ring network sense demodulating equipment, comprising a wide spectrum optical source, a photo detector, an optical fiber 4*4 coupler, a self-focusing lens, a pyramid plane reflector groups, a monomode fiber, an optical fiber ring network composed a plurality of optical fiber sensors with different lengths in series; the wide spectrum optical source and the photo detector are connected with the two optical fiber input ends of the optical fiber 4*4 coupler, and the other two optical fiber input ends of which are respectively connected with the self-focusing lens, which the two optical fiber output ends of the optical fiber 4*4 couple are connected with the optical fiber ring network through the monomode fiber, and the other two optical fiber output ends of which are respectively connected with the self-focusing lens. According to the invention, through the durable optical fiber ring chamber of the double reference optical path, the expansion of the optical path scanning range can be realized, and the multiplexing number of the sensors is added, which has simple structure, easy implement, high accuracy of measurement and low cost and the like.

It is intended to provide a process for producing a packaged drink whereby filling can be performed at room temperature without resorting to using a chemical or sterile water, the favorable taste and flavor of the content can be maintained while relieving the thermal degradation thereof, it becomes unnecessary to employ a heat-resistant container or to thermally sterilize or cool after sealing, and thus both of the equipment cost and the running cost can be largely reduced. After thermally sterilizing the content to give a definite sterilization value, it is quickly cooled to room temperature and then stored in a storage tank that has been preliminarily sterilized under such conditions as being equal to or exceeding the thermal sterilization conditions for the contents. While maintaining the storage tank under positive pressure with the use of a sterile gas, the content is fed into a filling machine that has been preliminarily sterilized under such conditions as being equal to or exceeding the thermal sterilization conditions for the contents. Thus, the liquid-feeding system ranging from the storage tank to the filling machine is made a closed liquid-feeding pathway free from the invasion of air from the outside. The drink is filled into a container having been sterilized with hot water in an environment-controlled space isolated from the outside wherein the surroundings have been thermally sterilized and washed with hot water at 65 DEG C to 100 DEG C.

The invention discloses a fiber bragg grating track sensing system based on an optical code division multiple access technique. An encoding optical pulse emitted by a broadband light source under the control of a control and analysis unit enters a plurality of sensing fiber bragg grating arrays arranged along a track through an optical isolation unit, the reflected light of the fiber bragg grating arrays enters a modulating circuit in an electrical signal mode for I-V conversion and voltage amplification after entering a photoelectric receiving unit through an optical filter, and a digital-to-analog converter samples the amplified voltage signals to convert the voltage signals to digital signals and then transmitting the digital signals to the control and analysis unit for analysis so that the modulation result of the measured physical quantity is obtained; and the used encoding sequence and the length and the bit time slots thereof are stored by the control and analysis unit. Compared with the sensing system using the traditional fiber bragg grating network multiplexing technique, the invention has the advantages of simple structure, flexible networking, greatly increased multiplexing quantity, high modulating speed and the like and is especially suitable for the quasi-distribution type measurement of a plurality of physical quantities in the large range of track traffic line.

The invention relates to a thermoplastic composite material building template that comprises 8mm-30mm long glass fiber added in the thermoplastic, and invents a preparation process of the building template as well as special equipment used for implementing the preparation process, thus ensuring that the 8mm-30mm long glass fiber in the thermoplastic composite material building template accounts for 5 percent-60 percent of the weight of the building template. In the building template provided by the invention, the 8mm-30mm long glass fiber accounts for 5 percent-60 percent of the weight of the template, which obviously improves the rigidity / mass ratio and resistance to creep, as well as the stretching, bending and impact properties of the template. Simultaneously, the adoption of thermoplastic leads the building template to be capable of being recovered and renewedly manufactured and processed in damage or in need of other shapes, thus being more environment-friendly and saving more materials. Finally, the addition of inorganic filler can also improve the wearing resistance of the surface of the building template as well as the reuse rate of the template, thus reducing the cost.

The invention relates to a construction method of an ultra-long bored concrete pile with large-diameter casing combination. Construction of bore forming of a pile foundation is completed by means of combination of multiple casings; the gap between every two steel casings is backfilled by sand; a reinforcement cage is hung in the most inside steel casing; concrete pouring is completed section by section through guide ducts; the most inside steel casing is pulled out after concrete pouring of the pile body is completed; then, other steel casings are pulled out so that construction of the bored concrete pile is completed. By the construction method, problems such as drilling difficulty, severe abrasion of the steel casings, proneness of pipe burying and pile breakage which are caused by overhigh friction force between the steel casings and the surrounding soil can be solved. The construction method has the advantages of deep bore, high speed, guaranteed construction quality and the like.

The invention provides a diamond wire saw with a stranded core, which comprises the stranded core, a buffer layer and an abrasive layer, wherein the stranded core is formed of multiple stranded metal wires, and the abrasive layer is provided with diamond abrasive grains. The diamond wire saw with the stranded core has the advantages of high reliability, quick cutting, breakage resistance, long service life, easiness in recovery and the like.

The invention discloses a method and system for resisting polarization fading of a natural gas pipe leakage detecting sensor group. A special modulated signal generating module and a laser form a light source, and a 2*2 coupler and a Faraday rotatormirror form a leakage sonic sensor with a Michelson structure; the sensor with the structure is arranged on a pipe body at a certain interval, adjacent sensors form a sensor group, and each sensor is connected in parallel between a transmitting optical fiber and a returning optical fiber through a light beam splitter and a light beam combiner; and two arms of each sensor are not equal in length, two Faraday rotatormirrors serve as reflecting mirrors of each sensor, the rotation angle is 45 degrees, and the polarization state change of reflecting light just counteracts the polarization state change of incident light, so that the visibility of signals of the sensors and the sensor groups is kept the highest. The phenomenon of polarization inducing signal fading of the interferometer is overcome, the sensitivity and accuracy of leakage detection are improved, the false alarm rate is reduced, and the method and the system are not easily affected by environment factors.

The invention designs a process for preparation, which utilizes silica-based mesoporous molecular sieves and calcium alginate to fix enzyme biocatalyst, and belongs to the technical field of fixing enzyme biocatalyst preparation technique. The process for preparation comprises utilizing silica-based mesoporous molecular sieves MCM-41 to be carrying agent, fixing biocatalyst molecule in meso-porous pore path of silicon oxide carrier, secondarily fixing immobilized enzyme biocatalyst which is prepared in calcium alginate gel. The process for preparation of the invention adopts a physical adsorption embedding method and a collosol-gel method. The fix enzyme biocatalyst of the invention has better enzyme dispersibility and higher enzymes loading, and has higher enzymatic activity recovery ratio and repeated utilization ratio. The invention can fix various enzymes such as horse radish peroxidase, proteinase, lipase and the like. The fix enzyme biocatalyst of the invention can be used to process waste water which contains hydroxybenzene and decolorize, which has higher catalytic activity.

The invention relates to organic group functionalized silica mesoporous molecular sieve enzyme immobilized carrier and the preparing method. The carrier includes the silica mesoporous molecular sieve on which there is organic group functional group. It includes silica mesoporous molecular sieve composing and organic group functional group transplanting. The average aperture of the carrier is 5-20nm. Specific surface area is 40-600m2 / g. The carrier immobilized enzyme apparent activity is 1000-2000IU / g which can be over 90% after 10 times using. The produced functionalized silica mesoporous molecular sieve can immobilize biological enzyme molecular under moderate condition by covalent union to make the immobilized penicillin acylase has high catalytic activity and stability in use.

The invention discloses an alloy ultrasonic-spraying strengthening method for a roll pass surface of a finishing roll of section steel and a spraying material, and belongs to the technical field of material surface strengthening. Nano-scaled carbide alloy powder is selected and used in the method and includes 15-20% of nickel-aluminum powder, 50-70% of cobalt-tungsten carbide alloy powder, 10-20% of chrome-molybdenum-manganese composite powder and 5-15% of boron-tungsten composite powder. The method comprises the following steps: firstly, priming on the finishing roll of the section steel with the nickel-aluminum powder by 0.02 mm; secondly, fusing the cobalt-tungsten carbide alloy powder, the chrome-molybdenum-manganese composite powder and the boron-tungsten composite powder, and uniformly spraying a fused material to the surface of the roll, wherein the thickness of a spraying layer is 0.15-0.20 mm, a distance between a spray gun and a sprayed surface is 160-180 mm, and an included angle between the spray gun and the sprayed surface is not more than 90 degrees. The method adopts an alloy ultrasonic-spraying strengthening mode, so that the high-temperature resistance and the wear resistance of the roll pass surface are improved, the online time of the roll is prolonged, the total amount of steel is increased by more than one time, and the service life of the roll is prolonged by more than two times.

A signal transmitting device includes: a synchronous-data detecting unit that detects, from parallel data specified by a predetermined format and including video data and audio data, synchronous data for controlling synchronization of the parallel data; an audio extracting unit that stores the audio data in an audio memory; a clock extracting unit that extracts a reference clock from the parallel data; a multiplexing unit that multiplexes the audio data and the synchronous data in a horizontal auxiliary data space of the video data; a control unit that controls, on the basis of the synchronous data and the reference clock, timing of the multiplexing unit for multiplexing the audio data with the video data; and a parallel serial converting unit that converts the video data multiplexed with the audio data by the multiplexing unit into a transmission stream specified by a Level A of a 3G-SDI format.

A WDFDM system of a fiber Fabry-Perot sensor includes a broadband light source, a rough WDM device, fibers, a coupler, an index of refraction matching solution, sensors and splitter and a spectrometer, among which, the fiber is an ordinary single-mode one, the sensor is a fiber Fabry-Perot sensor. The rough WDM device is used to divide broadband light into light in multiple channels to realize WDM. The splitter cuts in sensor of different cavity lengths on each channel to realize WDM. Sensor number capable of multiplexing in the WDFDM system is the product of the number of WDM and FDM independently so as to increase the multiplex efficiency greatly and obtain accurate test value.

The invention discloses an optical fiber laser sensor time division and wavelength division combined multiplexing method. The method comprises the steps that (1) intensity modulation is conducted on output light of an optical fiber laser through an optical switch so as to generate a narrow-pulse optical signal with the high extinction ratio to achieve channel selection, and a time division multiplexing structure is built; (2) an optical fiber laser sensor linear wavelength division multiplexing array is built in each time division multiplexing channel so as to achieve optical fiber laser sensor time division and wavelength division combined multiplexing; (3) displacement information of each laser wavelength in the selected channel is converted into interferometer output phase changes through the same non-equilibrium fiber optic interferometer; (4) interference information with different wavelengths is separated into n signal demodulator circuits, and a sensing signal which corresponds to the time division channel, has the corresponding wavelength and is at the position of the optical fiber laser sensor is demodulated. According to the optical fiber laser sensor time division and wavelength division combined multiplexing method, the multiplexing number of the optical fiber laser sensor array is improved to the greater degree, and the whole optical fiber laser sensing system is thinner, lighter and more reliable.

The invention discloses a uranium extraction from seawater adsorbent with antibacterial property and a preparation method thereof. The uranium extraction from seawater adsorbent comprises the following ingredients in parts by weight: 10 parts of basic materials, 50-70 parts of acrylonitrile, 30-50 parts of an acrylic acid reagent, 5-80 parts of metallic oxide aqueous dispersion and 10-50 parts of hydroxylamine hydrochloride methanol aqueous solution. The preparation method comprises the following steps: performing a grafting reaction on basic materials, acrylonitrile, an acrylic acid reagent and metallic oxide aqueous dispersion under the condition of co-radiation; performing amidoximation under a neutral and alkaline environment, so as to obtain the uranium extraction from seawater adsorbent with antibacterial property. The antibacterial rates of the uranium extraction from seawater adsorbent with antibacterial property obtained by the invention to golden yellow staphylococcocci and escherichia coli reach 95% and 90% respectively; due to the synergistic effect of metallic oxides and amidoxime groups, the adsorbing capacity is improved by 131%. In the uranium extraction from seawater adsorbent with antibacterial property, animal hairs and synthetic fibers are taken as the basic materials, so that the sources of the materials are wide, and the cost of the materials is low; co-radiation grafting is adopted in the preparation processes, and any initiator does not need to be added, therefore, the preparation cost is effectively lowered.

The invention relates to a device and method for processing sodium p-toluenesulfonate waste liquor. The device comprises a direct current power supply, a membrane stack, a clamping device, a carbon fiber felt electrode, an electrode liquor storage tank, an acid chamber storage tank, a waste liquor chamber storage tank, an alkali chamber storage tank, a liquor adjuster, an alkali chamber valve block, a waste liquor chamber valve block, an acid chamber valve block, an electrode chamber valve block, an acid chamber filled with a cation exchange resin, a salt chamber, an alkali chamber filled with an anion exchange resin, an anion exchange membrane, a cation exchange membrane and a bipolar membrane. A PAN (polyacrylonitrile)-based carbon fiber felt electrode used in the device and method has the characteristics of low resistance, good electric conductivity, oxidation resistance and corrosion resistance. The salt chamber is filled with a cation and anion mixed resin, and the acid chamber and the alkali chamber are respectively filled with the cation exchange resin and the anion exchange resin, so as to further improve the conductance of an electrodialysis cell, reduce the polarization and energy consumption, and lighten the membrane pollution. The device and method can be used for processing the production waste liquor of high-concentration hardly-degradable pentaerythritol triacrylate, so as to obtain acid and / or alkali and realize recycling of the waste liquor.

The invention discloses a preparing method of corn stalk core hemicellulose-based hydrophobic temperature-sensitive gel. The method includes the steps of peeling, grinding and screening air-dried corn stalk to obtain a qualified raw material, separating out hemicellulose in the qualified raw material through an alkali-assistant hot water extraction technology, grafting and copolymerizing N-isopropylacrylamide and phenyl methacrylate on a hemicellulose macromolecular chain through a water solution micelle polymerization method, and carrying out a cross-linking reaction with N,N-methylenebis acrylamide to obtain the corn stalk core hemicellulose-based hydrophobic temperature-sensitive hydrogel. The prepared gel is white and massive, has high adsorption capacity for chlorophenasic acid, pentachlorodiphenyl and 3,4-benzopyrene, can be repeatedly used without losing the adsorption efficiency by controlling adsorption and desorption effects through temperature, and belongs to an environment-friendly type hydrophobic organic pollutant temperature-control adsorption material.

The invention provides a flexible ultra-hydrophobic up-conversion luminous thin film. Rare earth ion doped NaYF<4> upper-conversion luminous nanoparticles are embedded into a polystyrene fiber matrix and then knitting is performed, so the rare earth ion doped NaYF<4> upper-conversion light-emitting nanoparticles / PS composite fiber mesh felt thin film is prepared. The preparation method mainly comprises steps of adding Yttrium chloride hexahydrate, sodium chloride, rare earth chloride, branching polyethylene imine and ammonium fluoride orderly and proportionally into glycol solution; then carrying out a hydro-thermal reaction so as to prepare white block-shaped sediment, i.e., the rare earth ion doped NaYF<4> upper-conversion light-emitting nanoparticles; scattering the rare earth ion doped NaYF<4> upper-conversion light-emitting nanoparticles in polystyrene sol prepared from N, N-dimethyl formamide solution; and then by use of static spinning technology, preparing the thin film. The thin film is a kind of highly sensitive cuttable water phase fluorescence detection material with high reusing performance, lower in cost and suitable for large-scale industrial production, and preparation technology is simple.

The invention discloses a manufacturing device and a method of a resin transparent concrete block, and belongs to the technical field of novel concrete materials. The device used by the method is characterized by comprising a light guide body prototype part, a mold separation piece, cushion plates and a surrounding mold, wherein the light guide body prototype part comprises connecting parts acting a connecting effect, and multiple light guide branches; all the light guide branches can be connected as a whole due to the existence of the connecting parts thereby facilitating demoulding of a silicone mould and facilitating concreting; the mold separation piece is a middle-hollowed rectangular sheet, so that the mold can be naturally divided into two parts of a top mold and a bottom mold, and contact surfaces of the top mold and the bottom mold are smooth and compact in connection; and the cushion plates are two wood plates with the same size to raise the mold separation piece to a needed height. The device can conveniently and quickly apply a mold turning method to manufacture the silicone mold so as to produce resin light guide bodies in batches, so that the production efficiency of resin transparent concrete is improved.

The invention provides a wollastonite reinforced wood-plastic building template and a preparation method thereof. The wollastonite reinforced wood-plastic building template is obtained by carrying out ball milling and stirring on the raw materials of wollastonite cebollite powder and the like in a ball mill at first, then mixing the raw materials in a mixing machine at a high speed and a low speed, and finally carrying out double-screw extrusion, mould forming, cooling shaping and traction cutting on a production line for a wood-plastic building template. The wood-plastic building template produced by the preparation method provided by the invention is wear-resistant, non-toxic and environment-friendly, capable of being cyclically used, and wide in use range.

The invention discloses an aminoglycosides molecular molecularly imprinted solid-phase extraction column. Molecularly imprinted polymeric microspheres are filled in a columnar shell, and a preparation method for the molecularly imprinted polymeric microspheres comprises the steps of: taking 3-aminopropyltriethoxysilane or phenyltriethoxysilane as functional monomers, taking tetraethyl orthosilicate as a cross-linking agent and taking aminoglycoside antibiotics as template molecules, performing hydrolytic condensation by adopting a sol-gel method, forming a rigid network structure of an Si-O-Si bond on the surface of activated silica gel to form the polymeric microspheres; and eluting.by using template molecules, so as to obtain the molecularly imprinted polymeric microspheres. The extraction column is used for separating and concentrating target objects before sample pretreatment is performed on residue of veterinary drugs of the aminoglycoside antibiotics, and selectively adsorbing the target objects, and has the advantages of being simple and fast in separation, purification and concentration, little in organic solvent consumption and high in repeatedly used times, and the like.

The invention relates to the field of environmental protection treatment, in particular to a resource treatment process for inorganic salt hazardous wastes; and the main steps comprise feed treatment,high-temperature oxidation, waste salt refining treatment and evaporative crystallization. According to the process, the inorganic salt hazardous wastes are subjected to resource treatment through aprocess of negative pressure drying, a multilayer suspended oxidation furnace and a high-temperature rotary oxidation furnace, and compared with a traditional industrial slag salt high-temperature heat treatment process, the process can efficiently remove organic matters and effectively solve the problems of inorganic salt melting agglomeration, high-temperature refractory material corrosion and pipeline blockage caused by cooling in a pipeline during inorganic salt refining which may exist at high temperature; by using a carbamido modified bagasse adsorbent, trace organic matters remaining ina salt solution can be effectively removed, and the process of negative pressure drying and high-temperature liquefaction oxidation furnace is adopted, so that the high-temperature decomposition rateof the organic matters in the slag salt can be guaranteed and the problem of melting agglomeration can be solved.

The invention relates to a whitewater processing method comprising the steps that: the pH value of the whitewater is regulated to 8-14; a certain amount of a mixed solution of a flocculating agent and a cationic polymer is added to the whitewater, until the total mass concentration of the flocculating agent and the cationic polymer in the whitewater is 1000-3000ppm. In the mixed solution, the mass concentration of the flocculating agent is 1-5%, and the mass concentration of the cationic polymer is 0.1-0.5%. According to the invention, papermaking whitewater is processed by using the whitewater processing method provided by the invention, and is then used in preparing slurry. Therefore, paper one-time retention rate and filler retention rate can be substantially improved, and paper bursting index and tensile strength index are improved to a certain extent. Also, when the slurry is used in papermaking, concentration, turbidity, conductivity, and COD of collected under-mesh whitewater are greatly reduced, such that whitewater recycling time can be increased.

The invention discloses a composite gas bottle health monitoring system and method based on acoustic emissions. The system comprises a sensor, a front amplifier, a main amplifier, an analog-digital converter, a collector and a processor; the sensor is used for detecting acoustic emission mechanical waves inside a composite gas bottle, and converting the acoustic emission mechanical waves into voltage vibration signals; the front amplifier is used for amplifying the voltage vibration signals to obtain second electric signals; the main amplifier is used for amplifying the second electric signals to obtain third electric signals; the analog-digital converter is used for converting the third electric signals into digital signals; the collector is used for collecting and transmitting the digital signals in real time; the processor is used for receiving the digital signals and carrying out analysis processing on the signals, and acoustic emission signal feature parameters needed by composite gas bottle health monitoring are obtained. Health monitoring under the use state of a composite gas bottle is achieved, and the damage condition and the fatigue life of the composite gas bottle can be effectively evaluated and predicted.

The invention discloses a release agent, which comprises the following raw materials by weight part: 10-50 of fatty acid; 5-20 of a zirconium saline solution; and 30-70 of a polyvinyl alcohol aqueous solution. The invention also discloses a preparation method of the release agent, and the method comprises the following steps of: mixing the fatty acid, the zirconium saline solution and the polyvinyl alcohol aqueous solution uniformly, heating the mixture to 60DEG C-80DEG C, conducting heat preservation for 0.5h-1h, and cooling the mixture to room temperature, thus obtaining the release agent. The invention also discloses release paper, which is composed of release base paper and a ground coat as well as a release coat that are successively attached to one side of the release base paper surface. The release coat is formed by subjecting the release agent to coating and heat curing treatments. The release agent provided in the invention has cheap and easily available raw materials. The preparation method of the release agent is simple, and has small pollution to the environment. The release paper prepared from the release agent has a short heat curing time, so that the release agent is suitable for industrialized production.

The invention discloses immobilized lipase and a method for preparing the same. The method for preparing the immobilized lipase comprises the following steps: evenly mixing lipase solution with polymer emulsion the weight of which is between 3 and 60 percent against that of the lipase solution, immersing a non-woven fabric by the obtained mixed liquid, and drying the mixed liquid to obtain the immobilized lipase, wherein the polymer emulsion is polyacrylate emulsion or the mixed emulsion containing polyacrylate and polyurethane as solutes. Experiments prove that the immobilized lipase has high catalysis performance and long service life, can still keep the catalysis efficiency above 90 percent after various continuous catalytic esterification reactions and transesterification reactions, and the required amount of the immobilized lipase for catalytically producing each ton of bio-diesel is less than or equal to 4 kilograms.

The invention belongs to the field of analytical chemistry and relates to an extraction head detachable type solid phase micro extraction probe and a preparation method thereof. The preparation method comprises the following steps of: shearing a polydimethyl siloxane tube and a metal wire; coating a layer of high-temperature epoxy resin glue on the metal wire and sleeving the polydimethyl siloxane tube on the metal wire for fixedly bonding to obtain a self-made extraction head, wherein a sleeve is arranged at one end of the self-made extraction head, and a free metal wire is arranged at the other end of the self-made extraction head; then properly extruding at the position of an inner tube of a solid phase micro extraction probe suit, which is away from the tail end by 0.2-0.5cm so as to generate a dent, or bending the free metal wire part of the self-made extraction head by more than one bent; and inserting the metal wire into the inner tube. The probe is simple and convenient in theuse and preparation processes; the probe can be continuously used by extracting the extraction head and inserting a new self-made extraction head after being used; and the repeated selective examination times can reach 80-120 times. The cost of each probe is one thousand of that of the traditional commercial probe and has strong operability and reliability.