32results about How to "Crystalline" patented technology

The invention relates to a method for preparation of a multi-element mesoporous metal oxide by a hard template. The method uses mesoporous foam silica as the hard template, and chloroform as a solvent, FeCl3.6H2O, AlCl3 and MgCl2. 6H2O with a stoichiometric ratio of n (MgCl2.6H2O): n (AlCl3): n (FeCl3. 6H2O) of 1:x:10-x,(0<= x<= 1) are added, and the multi-element mesoporous metal oxide is obtained by ultrasonic dispersion, stirring, standing, filtering, water washing, drying and calcination at high temperature. The method has the advantages that: 1) the multi-element metal oxide mesoporous material has ferroelectric, ferromagnetic and dielectric semiconductor properties, so that the wave-absorbing properties of the material can be improved; and 2) by use of the mesoporous foam silica as the hard template, and by means of the ultra-large hole size and a three-dimensional connected special structure of the mesoporous silica foam material, the ordered multi-element mesoporous metal oxide is obtained, and 3) the multi-element mesoporous metal oxide obtained by the hard template method has crystalline hole walls, and the crystallinity is improved by increasing of the heat treatment temperature.

The invention relates to a wear-resistant coating and an automobile polyurethane wear-resistant adhesive tape based on the same. The wear-resistant coating provided by the invention comprises, by weight, 10-20 parts of thermoplastic polyester elastomer with shore D hardness of 40-60 HD, 10-20 parts of short-oil alkyd resin with the fatty acid content of 30-40%, 1-5 parts of PBT resin with the meltindex of 30-45 g / 10 min under the condition of 250 DEG C * 2.16 k, 15-35 parts of ceramic powder comprising first ceramic powder with the particle size of 10-100 nm and second ceramic powder with theparticle size of 500-1000 nm, metal nano-powder with the particle size of 20-50 nm, 5-15 parts of an auxiliary agent and 40-60 parts of an organic solvent.

The invention belongs to the technical field of polymer materials, and in particular relates to a crystalline N-substituted polythiourethane and a preparation method thereof. The present invention uses carbon oxysulfide and N-substituted aziridine as raw materials to obtain crystallized N-substituted polythiourethane by copolymerization under bulk or solvent conditions. The method developed by the present invention has the following advantages: it can react itself without a catalyst; the raw materials are cheap and easy to obtain, and the synthesis is simple, without using toxic mercapto compounds and isocyanate compounds in the traditional system; the prepared N-substituted polythiocarbamic acid The main chain structure of the ester polymer is clear and has a fully alternating structure; the polymer is crystalline and has excellent thermal stability. The polymer is easy to recycle and reuse, and can be thermally degraded into a five-membered ring N-substituted thiocarbamate with application value, without any additional impurities or volatile pollutants, and is an environmentally friendly Recyclable specialty polymers.

A resin-covered metal sheet excellent in durability (resistance to moist heat) which is obtained by laminating a metal sheet with a laminated sheet consisting of at least two unstretched layers (layers A and B) made mainly of a polyester resin via an adhesive with the layer B side employed as the adhesive surface, wherein the laminated sheet has a total thickness of 65 to 300mum and a pigment for coloring and hiding is incorporated mainly into the layer A, with the layers A and B having thicknesses of 50 to 250mum and 15 to 80mum respectively and with the amount of the pigment component contained in the layer B being limited to at most 10 parts by weight per 100 parts by weight of the resin component. Further, resin-covered metal sheets having good embossed appearance can be provided by the use of a current embossing machine used in embossing flexible PVC sheets.

The invention discloses an electron acceptor material for an organic solar cell and its preparation method and application. Using benzotrithiophene core, introducing different numbers of thiophene unit bridges, and then introducing strong electron-withdrawing groups at the end to realize its photoelectric properties regulation to construct high-performance electron acceptor materials for organic solar cells. The organic solar cell electron acceptor material of the present invention exhibits excellent exciton separation ability, has good thermal stability, electrical stability and solution processing performance, and is easy to synthesize, easy to purify, and low in cost. It is a fullerene electron acceptor material. potential substitutes. It is suitable as a non-fullerene electron acceptor material and widely used in the preparation of high-performance organic solar cell devices.

The invention discloses a perfluoroalkyl polyacrylate waterproofing agent, a preparation method and an application. The active ingredient of the waterproofing agent is sulfur-containing long heterochain perfluoroalkyl acrylate copolymer, and sulfur-containing long heterochain perfluoroalkyl acrylate, butyl acrylate, methyl methacrylate and hydroxyethyl methacrylate Composition of mixed monomers, under the emulsification of non-ionic surfactants and anionic surfactants, it is obtained by initiating emulsion polymerization with an initiator. Applying this finishing agent to cotton fabric finishing can provide very excellent waterproof function. Due to the crystallinity of sulfur-containing long heterochain perfluoroalkyl groups, there is no surface reconstruction phenomenon when the acrylate copolymer contacts liquid, and the waterproof function is excellent. Moreover, long heterochain perfluoroalkyl groups contain carbon-sulfur heterobonds, are easy to degrade, and have no cumulative toxicity, so they are not banned fluorine-containing chemicals. At the same time, the waterproofing agent provided by the invention is prepared by traditional emulsion copolymerization, has mild reaction conditions, low equipment requirements, simple process, easy control, and is suitable for industrial production.

The invention relates to a mesoporous material, and particularly relates to a multi-element metal oxide mesoporous material. The material is prepared by using mesoporous foam silica as a hard template, a preparation method comprises the following steps: 1) adding the mesoporous foam silica to chloroform for ultrasonic dispersion, adding FeCl3.6H2O, AlCl3 and MgCl2. 6H2O, adding ammonia solution to adjust the pH value of 8-10, stirring, standing, filtering, washing with water and drying to prepare nano powder; 2) performing high temperature calcination on the dried nano powder to prepare a nano ferrite wave-absorbing material. The multi-element metal oxide mesoporous material has the advantages that: 1) the nano ferrite is a multi-element metal oxide material, has ferroelectric, ferromagnetic, and dielectric semiconductor properties, so that the wave-absorbing properties of the material can be improved; and 2) by use of the mesoporous silica as the hard template, and by means of the ultra-large hole size and a three-dimensional connected special structure of the mesoporous silica foam material, the ordered mesoporous nano ferrite is obtained, and the nano ferrite has both nano material properties and the three-dimensional pore structure.