141results about How to "Stable film formation" patented technology

The invention relates to a sensor, in particular to an electrochemical sensor for determining the concentration of heavy metal ions in a water sample. The electrochemical sensor specifically comprises a working electrode, a reference electrode and an auxiliary electrode, and the working electrode, the reference electrode and the auxiliary electrode are respectively connected to a control potential meter through conducting wires; the working electrode consists of a polytetrafluoroethylene pipe and a carbon electrode clamped therein, the bottom end of the carbon electrode is connected with a lead wire for leading out, and a sensitive membrane is arranged at the top end of the carbon electrode; and the sensitive membrane consists of a nano-functional absorbing material, a heavy metal ion carrier and an ion exchange agent, 1-20mmol of nano-functional absorbing material, 0.5%-5% by weight of the ion exchange agent and the 0.5-10mmol of the ion carrier are added in each liter of dispersant and evenly mixed, and then 1mu L-30mu L of the mixture is taken and evenly coated on the surface of the carbon electrode. The electrochemical sensor has low cost, simple technology, high selectivity and sensitivity and good stability, and can be extensively applied in the detection of the heavy metal ions in waste water, fresh water, sea water, daily necessities and body fluid.

The invention relates to a vertical tube type falling-film evaporator. The vertical tube type falling-film evaporator comprises an upper tube box, a lower tube box, a casing, multiple heat exchange tubes, an upper tube plate and a lower tube plate, wherein a solution inlet and a secondary steam outlet I are arranged at the upper tube box, a concentrated liquid outlet and a secondary steam outlet II are arranged at the lower tube box, a steam inlet is arranged at the upper part of the casing, and a condensed water outlet is arranged at the lower part of the casing; a film distributing device used for distributing a solution on the inner walls of the heat exchange tubes is arranged in the upper tube box; the film distributing device comprises a liquid bearing plate, a liquid feeding plate, a liquid distributing plate and liquid guiding tubes. By means of a steam stripping effect generated by secondary steam and liquid films, the heat transferring push force and the evaporation efficiency are increased. The liquid films can be uniformly distributed by the film distributing device, the film forming is stable, the wall drying phenomenon is avoided, the recovery rate of secondary steam produced in an evaporator is high, the recovery is convenient, and the heat transferring efficiency is improved.

The invention discloses a novel method and a protective film agent for preventing and controlling soft rot of actinidia and a preparation method for the protective film agent. The chitosan composite protective film agent is adopted in the method. The protective film agent comprises the following components in percentage by mass: 2.5-7.5% of chitosan, 0.5-2.5% of calcium salt, 1.5-3.5% of a film former, 0.5-1.5% of an antibacterial substance and the balance of water. The fruit surface is sprayed with a 25-100-fold solution of the protective film agent in the field during the early stage of pathogen infection of the soft rot of the actinidia or the germination stage, young fruit stage and strong fruit terminal stage of the actinidia, so that a layer of natural barrier is formed on the fruit surface for protecting the actinidia from being infected with pathogenic microorganisms. The protective film agent for the actinidia is high in stability and can effectively improve the nutritional quality and the eating quality of the actinidia.

Provided are a cyclopentaphenanthrene-based compound and an organoelectroluminescent device employing the same. The cyclopentaphenanthrene-based compound is easy to prepare and excellent in solubility, color purity, color stability, and thermal stability. The cyclopentaphenanthrene-based compound is useful as a material for forming an organic layer, in particular, an emitting layer, in an organoelectroluminescent device, and as an organic dye or an electronic material such as a nonlinear optical material.

The invention relates to a production technology of contrast-effect automobile seat cushion leather. The protection technology comprises the steps of liming: dissolving Na2S, NaHS and lime into water in a mass ratio of 1:1:2 to form a liming alkali liquor, reacting fur with the liming alkali liquor in a liquor ratio of 100:100 for 6 h, adding the liming alkali liquor step by step to enable the liquor ratio to increase to 100:200, and continuously reacting for 12 h; retanning: for every 100 parts of fur, adding 100 parts of water, 1 part of a pre-fatting agent and 3 parts of a chrome tanning agent or a chrome-free tanning agent, reacting at the normal temperature for 1 h, adding 2 parts of sodium formate, reacting at the temperature of 40 DEG C for 1 h, and controlling the pH in a range of 3.6-4.0; and finishing: the finishing comprises the steps of roller coating of a bottom layer, embossing, spraying of a color layer, roller coating of an effect layer and spraying of a top layer. The leather produced through the technology is soft, fine in grain side, full in hand feeling, elastic, safe and environment-friendly and has characteristics of wear resistance, folding endurance, light resistance, color migration resistance and the like; and ornamental and pleasant characteristics of the leather are added due to roller coating of the effect layer, and the rigid and non-flexible appearance of ordinary automobile seat cushion leather is changed.

The invention discloses a special medicinal fertilizer for overwintering pisum sativum and a production method thereof. The production method of the special medicinal fertilizer is characterized by mixing and granulating urea, calcium superphosphate, Sugumi potassium, ammonium molybdate, borax and DMPP to obtain inner cores, pelletizing for two times, and coating with a coating agent, wherein the components pelletized for the first time comprise urea, monoammonium phosphate, Sugumi potassium, compound potassium nitrophenolate, the solution of tea saponin and nicotine, matrine, DMPP and a colloidal suspension, the components pelletized for the second time comprise urea, a calcium, magnesium and phosphate fertilizer, Sugumi potassium, a chelated salt of amino acid and trace elements, borax, DMPP and a colloidal suspension, and the components of the coating agent comprise imidacloprid, Dual metolachlor, a film forming agent, pearl powder, titanium dioxide and a dye. Through one-time coating, two-time granulating and three-time controlled-release material using, the effective period of urea can be prolonged to 170 days from 15 days or so. The special medicinal fertilizer disclosed by the invention has the effects of weeding, killing insects, promoting the growth of plants and increasing the fruit setting rate of plants.

The invention discloses a preparation method and a using method of anti-stripping exterior wall putty powder. The preparation method comprises the following steps of: step one, adding 6-8 parts of talcum powder, 2-4 parts of white bentonite and 12-14 parts of white portland cement to a pulverizer so as to be pulverized to obtain powder less than 150 meshes; step two, mixing the obtained powder, 40-44 parts of diatomite, 7-9 parts of high-strength gypsum powder and 6-8 parts of titanium dioxide, placing the mixture in a pulverizer so as to be pulverized for 10-15 minutes, then adding 2-3 parts of hydroxypropyl methyl cellulose, and pulverizing for 5-10 minutes again; step three, sieving the powder obtained in the step two by using a screen mesh with 320 meshes, wherein sieve residue is the anti-stripping exterior wall putty powder. The using method comprises the following steps of: placing the anti-stripping exterior wall putty powder in a container, adding water to the putty powder in the proportion of the exterior wall putty powder to the water being 10: (2-3), adding a right amount of pigment according to the color of an exterior wall, soaking for 40-60 minutes, and then stirring the mixture for 5-10 minutes by adopting a stirrer for blade coating.

The invention discloses a preparation method of a gypsum plastic suction mold. The preparation method comprises a, work mold preparation, b, reinforcement treatment, c, polishing treatment, and d, mold aftertreatment. The preparation method has reasonable processes, can be implemented simply, and has a moderate preparation cost. The gypsum plastic suction mold has a reinforced layer structure on the surface. The reinforced layer structure has the advantages of reasonable cost and stable and excellent film forming ability and can effectively improve strength, surface quality and a service life of the gypsum mold and improve practicality of the gypsum plastic suction mold.

The invention discloses anti-stripping exterior wall putty powder. The anti-stripping exterior wall putty powder is prepared from the following raw materials in parts by weight: 40-44 parts of diatomite, 6-8 parts of talcum powder, 2-4 parts of white bentonite, 12-14 parts of white portland cement, 7-9 parts of high-strength gypsum powder, 2-3 parts of hydroxypropyl methyl cellulose and 6-8 parts of titanium dioxide. The anti-stripping exterior wall putty powder disclosed by the invention does not contain harmful substances. As the components of the anti-stripping exterior wall putty powder are adjusted, the bonding strength of the putty is enhanced, and the anti-stripping property of the putty is improved.