61 results about "N-tetradecane" patented technology

Gel including a phase-change material and a gelling agent. In one embodiment, the phase-change material may be n-tetradecane, n-hexadecane or mixtures thereof. The gelling agent may be a high molecular weight styrene-ethylene-butylene-styrene (SEBS) triblock copolymer with a styrene:rubber ratio of about 30:70 to 33:67% by weight. To form the gel, the phase-change material and the gelling agent may be mixed at an elevated temperature relative to room temperature to partially, but not completely, dissolve the gelling agent. The mixture may then be cooled to room temperature. Alternatively, the phase-change material and the gelling agent may be mixed at room temperature, and the mixture may then be heated to form a viscoelastic liquid, which is then cooled to room temperature. The invention is also directed at a method of preparing the gel, a thermal exchange implement including the gel, and a method of preparing the thermal exchange implement.

Gel including a phase-change material and a gelling agent. In one embodiment, the phase-change material may be n-tetradecane, and the gelling agent may be a styrene-ethylene-butylene-styrene (SEBS) triblock copolymer. In particular, the SEBS copolymer may be a high molecular weight SEBS copolymer with a styrene:rubber ratio of about 30:70 to 33:67% by weight. The SEBS copolymer may constitute up to about 10%, by weight, of the gel, preferably less than 6%, by weight, of the gel, with n-tetradecane constituting the remainder. To form the gel, the phase-change material and the gelling agent are mixed together at an elevated temperature relative to room temperature to partially, but not completely, dissolve the gelling agent, i.e., a homogeneous solution is not formed. The mixture is then allowed to cool to room temperature. The invention is also directed at a method of preparing the gel and a thermal exchange implement including the gel.

The invention discloses a low-temperature phase change material used in drug cold-chain transportation. The low-temperature phase change material is prepared by mixing the following components in percentage by weight: 88.5-91.8% of n-tetradecane, 4-5% of n-dodecane, 2-3% of n-tridecane, 2-3% of n-pentadecane, and 0.2-0.5% of iso-tetradecane. According to the material, the melting point is 2-3 DEGC, so that the drug temperature can be kept within the valid range of 0-5 DEG C during transportation; in addition, the melting enthalpy of the material is high; the degree of supercooling is low; andthe circulating stability is high.

The invention discloses a constant-temperature double-layer natural essential oil bacteriostatic agent prepared from the following components: a natural essential oil, beta-cyclodextrin, urea, formaldehyde, melamine, Span-80, Twain-80, n-tetradecane, polyvinyl alcohol, a sodium chloride solution and deionized water. The invention also provides a preparation method of the bacteriostatic agent. The preparation method comprises the steps: by adopting in situ polymerization, the surface of the low-temperature organic phase-change material n-tetradecane is wrapped with a urea formaldehyde resin obtained by carrying out a condensation polymerization reaction of urea and formaldehyde, and thus an inner-layer modified urea formaldehyde resin low-temperature organic phase-change microcapsule is obtained; then the natural essential oil is adsorbed on the wall of the inner-layer modified urea formaldehyde resin low-temperature organic phase-change microcapsule, an outer layer is wrapped with beta-cyclodextrin as raw material, and thus the constant-temperature double-layer natural essential oil bacteriostatic agent is obtained. The constant-temperature double-layer natural essential oil bacteriostatic agent overcomes application limitations of the natural essential oil and the low-temperature organic phase-change material, improves the utilization rate of the natural essential oil, also has the microcapsule characteristic of slow release, and expands the application fields of the natural essential oil and the low-temperature organic phase-change material.

The invention discloses a novel reticulate structure capsule wall microcapsule phase-change material. The novel reticulate structure capsule wall microcapsule phase-change material comprises a capsule core material and an external capsule wall. The core material is a fatty hydrocarbon or fatty acid ester compound, preferably n-tetradecane, n-octadecane or butyl stearate, the shell layer adopts a reticulate structure, and the capsule wall is a polyurethane high polymer with a reticulate structure capsule wall and is formed by polymerizing diisocyanate and polyamine compounds as well as polyol compounds. The problems that the capsule wall of the microcapsule prepared through reaction of polyisocyanate and polyamine compounds has high permeability, low stability and low compactness and cannot prevent leakage of the core material well are solved. The invention also discloses a preparation method of the phase-change material. The preparation method particularly comprises the following steps: 1, weighing a capsule core component and polyisocyanate, and mixing to form a first solution; 2, preparing an emulsified liquid; 3, performing mixed reaction on the solutions prepared in the step 1 and step 2; 4, adding a water-soluble reaction monomer; 5, continuously performing temperature-increasing reaction obtained through preparation.

A calosoma maximoviczi morawitz attractant is characterized by mainly prepared through mixing the following materials in percentage by weight: 20%-70% of beta-trans-ocimene, 10%-50% of alpha-farnesene, 1%-10% of linalool, 1%-10% of paraethyl acetophenone, 1%-10% of azulene, 1%-10% of cis-3-hexenyl-acetate, 1%-10% of cis-3-hexenyl-1-alcohol, 1%-10% of n-tetradecane, 1%-10% of n-pentdecne and 1%-10% of n-heneicosane. The calosoma maximoviczi morawitz attractant and a lure core are high in sensitivity, free of environment pollution and low in cost, thereby having higher popularization and application values and displaying higher trapping activity in the field.

The present invention provides a substrate holding method capable of contributing to improvement in performance of an electronic part. A plastic film is adhered to a holding frame by using an adhesive tape having a proper gas releasing characteristic such that total quantity of gas detected when analysis using gas chromatograph mass spectrometry (dynamic HS-GC-MS) is conducted under test conditions of 180° C. and 10 minutes is 100.5 μg/g or less in n-tetradecane. In the case where the plastic film held by the holding frame is subjected to a process of manufacturing an electronic part (for example, a solar battery), even when a process accompanying generation of heat during the manufacturing process (for example, a film forming process such as plasma CVD) is performed on the plastic film, a release amount of unnecessary gas released from the adhesive tape due to the influence of the heat is suppressed, so that deterioration in the performance of the electronic part caused by the unnecessary gas is suppressed.

The invention relates to a method of preparing n-tetradecane or n-hexadecane from natural acid. According to the invention, the natural acid and a solvent are mixed and then undergo a hydrogenation reaction in the presence of a catalyst and hydrogen, wherein the catalyst is a palladium/carbon nanotube catalyst, reaction pressure of the hydrogenation reaction is 1 to 10 MPa, reaction temperature is 220 to 320 DEG C, reaction time is 3 to 10 h, the catalyst uses a multi-walled carbon nanotube as a carrier and 2 to 10% by mass of palladium as an active component, and the solvent is one selected from the group consisting of hexane, n-heptane, n-octane and dodecane. Compared with the prior art, the method provided by the invention has the advantages of simple preparation technology, a low reaction temperature, a small usage amount of the solvent, high reaction activity and high yield of a target product.

The invention relates to a method for preparing a temperature regulating agent using tetradecane/tetradecanol/melamine-modified urea formaldehyde resin as a temperature control material. The method comprises mixing n-tetradecane and tetradecanol at a certain ratio, coating the mixture with melamine/urea/formaldehyde resin through an appropriate emulsifier to obtain microcapsules, and re-coating the microcapsules with a high temperature-resistant phenolic-modified epoxy resin to obtain a temperature self-regulating material for asphalt. The microcapsules have the maximum endothermic value of 112.7 J/g at 4.5 DEG C. The asphalt temperature self-regulating material containing 30% by mass of the microcapsules has the maximum endothermic value of 23.62 J/g at 5.58 DEG C. The temperature regulating agent utilizes recyclable production resources, has a low waste rate and a certain mechanical performances, replaces a part of aggregates in asphalt and has a proper temperature adjustment interval. The method has the advantages of simple processes, low cost, environmental friendliness and wide application prospect.

The invention discloses anti-freezing lubricating oil. The oil comprises, by weight, 6-8 parts of n-hexane, 6-8 parts of n-heptane, 6-8 parts of n-octane, 4-6 parts of n-decane, 4-6 parts of n-dodecane, 4-6 parts of n-tetradecane, 2-4 parts of methylbenzene and 1-2 parts of anti-freezing agent. In this way, high-molecular alkane and aromatic hydrocarbon serve as basic solutions of the lubricating oil, the anti-freezing agent is added into the basic solutions, and then the function of reducing the freezing point is achieved, and the lubricating oil can be effectively prevented from being frozen in the cold outdoor. The formula is novel, the properties are stable, freezing is effectively prevented, and the lubricating oil is convenient to use and wide in application range and has wide market prospects in popularization.

The invention relates to the field of drilling fluids, and discloses a phase change microcapsule, a preparation method thereof, an intelligent temperature control water-based drilling fluid and application. The phase-change microcapsule comprises a core material and a wall material coating the outer surface of the core material, wherein the wall material also contains an optional wall material enhancer; the core material is selected from one or more of n-tetradecane, dodecanol, decanol and caprylic acid; the wall material is urea resin and/or melamine- formaldehyde resin; and the wall materialenhancer is manganous-manganic oxide. The intelligent temperature control water-based drilling fluid can intelligently regulate and control the temperature of underground drilling fluid, and hydratedecomposition caused by temperature rise of the drilling fluid can be avoided.

The invention discloses a solid-solid phase change material as well as a preparation method and application thereof. The solid-solid phase change material disclosed by the invention is prepared from the following components in percentage by mass: 80-87% of n-tetradecane, 3.8%-5.8% of n-tridecane, and the balance of superfine 52-degree semi-refined paraffin, totaling 100%. The preparation method ofthe solid-solid phase change material comprises the following steps: mixing and heating the n-tetradecane and the n-tridecane, then adding the superfine 52-degree semi-refined paraffin wax, heating and stirring until the paraffin wax is dissolved to obtain a solution system, stopping stirring and preserving heat of the solution system, and then cooling the solution system to room temperature to obtain the solid-solid phase change material. The crystallization temperature of the solid-solid phase change material can meet the refrigeration temperature required by the blood storage environment.The material is stable in shape, the material cannot seep out of an outer package at high temperature when the material is prepared into a cold accumulation device by means of filling, the problem ofpossible pollution is avoided, and the material is safe to use, free of risk and long in service life.

The invention belongs to the technical field of quaternary ammonium salt compounds, and particularly relates to a degradable quaternary ammonium salt compound and a preparation method and applicationthereof, a structural general formula of the quaternary ammonium salt compound is shown as a formula I, in the formula I, R1 is H or CH3, R2 is any one of n-decane, n-dodecyl and n-tetradecyl, R3 is Oor NH, and R4 is CH3 or CH2CH3. The invention has the beneficial effects that the quaternary ammonium salt compound simulates a phospholipid structure on the surface of bacteria, presents local amphipathy, and can replace and insert phospholipid on the surface of a cell membrane of the bacteria to change the original cell membrane structure, so that the cell membrane of the bacteria is broken, bacterial cell contents flow out and cells die.

The invention belongs to the technical field of beneficiation, and particularly relates to application of n-tetradecyl isopropanolamine as a collecting agent in scheelite flotation. According to the method, the collecting agent n-tetradecyl isopropanolamine is low in toxicity and free of pollution, strong electrostatic adsorption, hydrogen bond adsorption and physical adsorption exist between thecollecting agent n-tetradecyl isopropanolamine and scheelite, high selectivity is achieved for mixed ore of scheelite and gangue mineral calcite, the collecting agent n-tetradecyl isopropanolamine does not need to be compounded with other collecting agents, the using process is simple and convenient, and the agent system is simple. Test results show that the amine collecting agent n-tetradecyl isopropanolamine provided by the invention is used for scheelite mineral flotation collection, the scheelite recovery rate reaches 96.89%, the calcite recovery rate is only 8.68%, and the amine collecting agent n-tetradecyl isopropanolamine has the advantages of high selectivity, simple use process, simple reagent system and good flotation effect.