27 results about "Polymer crystals" patented technology

The invention discloses a preparation method of collagen nano polymer particles, which comprises the following steps: carrying out surface hydrolysis on organized collagen to prepare a microsphere base material; the preparation method comprises the following steps: uniformly mixing a microsphere base material, a target load, a nonionic surfactant and polyol ester in proportion to prepare a microsphere modified base material; and uniformly mixing the microsphere modified base material, an ether compound and a chemical auxiliary agent according to a ratio to prepare collagen microspheres, namely the collagen nano polymer particles. The preparation method comprises the following steps: firstly, reducing the volume of collagen through enzyme hydrolysis, reducing biological stimulation possibly caused by drug loading, and strengthening the drug loading property of the collagen nano polymer; and secondly, a polymer crystal region appears in the carrier protein in an aqueous solution by utilizing subsequent surface modification, so that the drug carrier can control the release progress of the loaded drug, and the drug carrier can permeate into deep tissues through the surface layer of the skin.

The invention belongs to the technical field of cement-based material admixtures, and particularly relates to a preparation and performance regulation and control method of a cement expanding agent. The technical problems of large component fluctuation, unstable performance and excessive expansion prevention at present are solved. According to the method, magnesium oxide is treated through low-temperature calcination, surface treatment and nano coating, an auxiliary expansion source high-activity magnesium silicate mineral is introduced, and meanwhile, a bio-based polymer crystal form regulating agent is doped to modify lignosulfonate to regulate the crystallization process of a hydration product, so that the expansion performance is controllable and stable and does not change drastically due to fluctuation of raw materials; excessive expansion is avoided while concrete shrinkage is effectively compensated, and cracking damage of a set cement structure is prevented.

SOLUTION: The present disclosure provides an optical diffusion film and a polarizing plate, the optical diffusion film 100 includes a polymer film layer 101 and grains 102 dispersed in the polymer film layer 101, the grains 102 include a crystallization seed and a polymer crystal 1022 attached to a surface of the crystallization seed, and the crystallization seed is a crystallization inducing agent 1021.EFFECT: The optical diffusion film and the polarizing sheet provided by the present disclosure can enlarge the viewing angle of the display device and improve the problems of color shift and rainbow pattern.SELECTED DRAWING: Figure 1

The invention relates to a tetracopolymer piezoelectric film for infrastructure monitoring, a preparation method and preparation equipment, the piezoelectric film comprises polyvinylidene fluoride, trifluoroethylene, chlorofluoroethylene and alkyne fluoride, the electromechanical coupling coefficient is 52%, the piezoelectric charge constant is 220 pm / V. The polyvinylidene fluoride, trifluoroethylene and chlorofluoroethylene are subjected to ternary polymerization, and the piezoelectric charge constant is 220 pm / V. A proper amount of FA monomer is introduced into the ternary polymer, part of CFE is replaced by the FA monomer, part of the FA monomer is embedded into a polymer crystal, the crystal spacing is reduced, a polymer chain is converted from loose 3 / 1 helical conformation to high-polarity all-trans conformation, and the size of a coherent crystalline region in X-ray diffraction is reduced. The proportion of the piezoelectric film has higher electromechanical coupling coefficient and piezoelectric charge constant, and meanwhile, the preparation equipment and the preparation method of the piezoelectric film improve the automation degree, the production efficiency and the production parameter control precision.

A piezoelectric element includes: a piezoelectric body having a first surface and a second surface that are different from each other; a first electrode provided at the first surface; and a second electrode provided at the second surface. The piezoelectric body contains a helical chiral polymer crystal having an orientation axis as a crystal axis, the orientation axis is uniaxially oriented in a manner of intersecting both the first surface and the second surface, and a degree of orientation of the orientation axis in the piezoelectric body is 0.80 or more.

The invention belongs to the technical field of composite films, and particularly discloses an epoxy barrier film and a preparation method thereof.The epoxy barrier film comprises a substrate and a film layer coated and photocured on the substrate, and the film layer is prepared from, by weight, 70-96 parts of long-carbon-chain epoxy resin, 0-25 parts of epoxy organosilane and 1-6 parts of photoinitiator. And 0.25 to 0.75 part of a leveling agent. The preparation method comprises the following steps: mixing epoxy resin with a long carbon chain, epoxy organosilane, a photoinitiator and a flatting agent according to a certain proportion, uniformly stirring, coating on a substrate to form a film, and carrying out light-induced self-assembly curing to obtain the epoxy barrier film. The polymer crystal is introduced into the polymer film in situ through a self-assembly structure formed in the photo-initiation polymerization process of the epoxy resin, so that the prepared film is high in water vapor barrier property and good in mechanical property, and the preparation process is simple, energy-saving and environment-friendly and has a wide application prospect.

The application discloses a luminescent coordination polymer crystal material based on a tetraphenylethylene pyridine ligand and a preparation method and application thereof, the chemical formula of the luminescent coordination polymer crystal material is [Cu(L)SCN.DMSO]n, wherein L is a 4.4'-[(2,2-diphenyl ethylene)di-4.1-phenylene]bis[pyridine] ligand, and n is an arbitrary value; wherein a Cu ion forms a two-dimensional structure with the 4.4'-[(2,2-diphenyl ethylene)di-4. n The crystal material can be used for fluorescence quenching detection of water-phase methyl orange; compared with the prior art, the crystal material is simple and reliable in application, the quenching constant of the crystal material for detecting water-phase methyl orange is as high as 1.9*10 6 M ‑1 , and the detection limit is as low as 0.019 mu M, so the crystal material is a luminescent coordination polymer crystal material for extremely sensitive detection of methyl orange at present and has a wide application prospect.

The present invention provides a three-dimensional binuclear terbium coordination polymer, the molecular formula of which is: [Tb 2 (μ 3 ‑HIA) 3 ·2H 2 O] n , of which HIA 2‑ It is a form of 5-(hydroxymethyl)isophthalic acid without two protons, and n represents the degree of polymerization. The metal coordination polymer crystal is in the monoclinic system, the space group is C2 / c, and the unit cell parameters are #imgabs0#α=γ=90°, β=115.0037(16)°. The terbium coordination polymer provided by the invention is obtained under hydrothermal conditions, has a simple preparation process, and a high yield, and can be used as a quenching fluorescent probe for efficiently detecting acetone molecules and hexavalent chromium ions.

The present disclosure generally relates to extrusion die systems. In particular, the present disclosure relates to the cyclical extrusion of materials to generate small sized grain features, generally in the range of nanosized grain features, in a tubular or profile shape, in which the individual nanolayers possess pores and / or polymer crystals oriented parallel to the extrusion flow direction and including products with enhanced permeation properties.

The invention relates to the technical field of electronic information, in particular to a preparation method of an N-type polymer transistor based on an electrolyte gate dielectric. Comprising the following steps: preparing a semiconductor solution and a gate medium solution, wherein the gate medium solution is prepared by jointly dissolving a polyvinylidene fluoride-trifluoroethylene copolymer P (VDF-co-TrFE), an ionic liquid and a polymer matrix in a solvent; a source electrode and a drain electrode are manufactured on a substrate by using gold metal particles in a thermal evaporation mode. And spin-coating a semiconductor solution on the substrate, and performing annealing treatment to form a polymer semiconductor layer. And spin-coating a gate dielectric solution on the semiconductor layer, and performing annealing treatment to form a solid electrolyte gate dielectric layer. And preparing an aluminum gate electrode by thermal evaporation to obtain the N-type polymer transistor based on the electrolyte gate dielectric. According to the method, the working voltage of the device can be greatly reduced, the performance of the device is improved, the short-range memory characteristic is shown, and the method has the advantages of being simple in process, high in stability and low in cost.

The invention discloses a preparation method of a copper-doped silicon carbide composite absorbing material. First, an anionic organic metal framework material is synthesized by a hydrothermal method. First, a hybrid crystalline metal organic framework containing a copper-silicon bimetal is synthesized by heating and refluxing, and then the material is coated with dopamine hydrochloride PDA; by regulating the proportion of dopamine and other substances, the chemical composition of the polymer crystalline precursor is regulated, and the precursor is further carbonized at a high temperature of 900°C to obtain a copper-doped silicon carbide composite carbon material. The material has a reflection loss value of ‑43dB at 2.5mm. At 2.0mm, the effective absorption bandwidth is 11.52GHz to 17.92GHz, covering the entire Ku band and part of the X band. At 2.05mm, the effective absorption bandwidth is 9.12GHz to 14.75GHz, covering the entire X band and part of the Ku band.

The application discloses a kind of crystal porous polymer composite membranes for lithium-magnesium separation and preparation method thereof, and the composite membrane includes a porous substrate film playing a supporting role and a covalent organic framework porous polymer crystal film covered thereon, and the surface defects of the crystal film are covered and plugged by the ultra-thin polymer film generated by interface condensation.The application covers and plugs the gap defects by the interface condensation film means of two reaction monomers at the film defect position of grain gap and growth discontinuity, and the processing mode only needs to immerse the crystal film with defects in aqueous solution and oil phase solution containing reaction monomers in sequence to quickly complete the repair of surface defects, and the method is simple in operation, low in cost and strong in universality.

The invention relates to a method for preparing a fuel cell by taking an electron transfer mediator loaded metal organic framework material as an anode modification material. The metal organic framework material is a porous coordination high-molecular polymer crystal formed by coordination of metal ions and organic ligands. Many metal organic framework materials are poor in conductivity, and electron transfer and substance transfer between active sites of the metal organic framework materials and catalyzed reactants are difficult in the aspects of stereo, distance and the like. Through compounding of the metal organic framework material and the electron transfer mediator, electron transfer and substance transport capabilities between active sites of the metal organic framework material and a catalyzed reactant are enhanced, and the catalytic performance of the metal organic framework material can be greatly enhanced. The metal organic framework material loaded with the electron transfer mediator is used as an anode modification material, the metal organic framework material loaded with the electron transfer mediator is used as a catalyst, oxidation of target fuel is catalyzed, the fuel cell is constructed, and the method has the advantages of being easy to operate, simple in procedure and the like.

A method for evaluating the channel interface of a polymer transistor, based on three parameters: total carrier concentration, free carrier concentration, and channel interface trap density, evaluates the quality of the channel interface of a polymer transistor by comparing it with a standard sample, helps to better analyze the device performance, provides theoretical guidance for evaluating the effects of the structure of thin-film transistors, fabrication processes, active layer and gate insulating layer materials, etc. on the electrical performance of the device, and further provides a reference for building an evaluation model for polymer transistor interface analysis in the future.

The invention relates to the technical field of electronic information, in particular to a preparation method of an N-type polymer transistor based on a titanium / aluminum / titanium laminated contact electrode. Comprising the following steps: preparing a semiconductor solution and a gate medium solution, wherein the gate medium solution is prepared by dissolving n-butyl acrylate in a solvent; a source electrode and a drain electrode are prepared by laminating titanium, aluminum and titanium metal particles on a substrate in a vacuum evaporation manner. And performing annealing treatment on the spin-coated semiconductor solution to form a polymer semiconductor layer, and performing annealing treatment on the spin-coated gate dielectric solution to form a polymer gate dielectric layer. And then preparing an aluminum gate electrode by thermal evaporation to obtain a target transistor. According to the method, bipolar transport of the donor-acceptor (bipolar) copolymer field effect transistor can be changed into unipolar transport, off-state current is reduced, the performance of the N-type polymer transistor is improved, meanwhile, cost is reduced, and conditions are created for achieving a complementary circuit.

This disclosure provides polymeric materials comprising polymer crystals, methods and resins for making the same, and objects and appliances made from said polymeric materials. Polymeric materials having polymer crystals provide favorable properties, such as enhanced durability and rigidity. This disclosure also provides polymeric materials comprising a crystalline phase comprising at least one polymer crystal, as well as an amorphous phase comprising at least one amorphous polymer. The crystalline phase can confer rigidity to the polymeric material, while the amorphous phase can confer elasticity and flexibility.

The invention discloses an intelligent water boiling test device for polymer crystalline silicon insulators, relates to the technical field of insulator testing, and has the advantage of improving safety in use. The key points of the technical solution are: it comprises a water boiling box, the box opening of the water boiling box faces upward, the top of the water boiling box is horizontally slidably connected with a closing plate for closing the box opening of the water boiling box through a moving part, and the front side of the water boiling box is vertically slidably connected with a placement component for placing insulators. When the closing plate slides to open the box opening of the water boiling box through the moving part, a transmission component for driving the placement component to move vertically upward in the water boiling box is provided on the closing plate, and a transfer component for transferring the insulator on the placement component to the top of the closing plate is provided on the closing plate.

The invention discloses a luminescent crystal material based on a carbazolyl pyridine ligand, a preparation method thereof and application of the luminescent crystal material in ratiometric fluorescence detection of trifluoroacetic acid, the luminescent coordination polymer crystal material [Cd (L) I2. DMAC] n is prepared based on a 2, 7-bis (pyridine-4-yl)-9H-carbazole ligand for the first time, the method is simple, the synthetic route is simple and easy to control, the product yield can reach 35.6%, and the preparation method is suitable for industrial production. The method is suitable for industrial production. Compared with a coordination polymer through fluorescence quenching detection, the material realizes the ratiometric fluorescence detection of TFA by the coordination polymer for the first time, the sensitivity is extremely high, the sensitivity of ratiometric fluorescence detection of water-phase TFA is 385% per pH unit, the detection limit is as low as 0.35 mu M, and the material has a wide application prospect.

The invention belongs to the field of solid-state lithium ion battery materials, and particularly relates to a preparation method of a composite polymer quasi-solid electrolyte, which comprises the following steps: 1) mixing h-BN with ethanol and deionized water for ultrasonic treatment, dropwise adding ammonia water for ultrasonic treatment, dropwise adding TEOS liquid and stirring; filtering and washing the obtained suspension, and carrying out vacuum drying on the product; (2) mixing deionized water and absolute ethyl alcohol, adding acetic acid, uniformly stirring, adding GPTMS, stirring, adding the product in the step (1), and stirring; filtering, washing with absolute ethyl alcohol, and drying in vacuum; 3) uniformly mixing PVDF and LiTFSI, adding the mixture into a DMF solvent, and stirring to obtain a solution A; 4) performing ultrasonic treatment on the product in the step 2) in a DMF solvent to obtain a suspension B; (5) slowly pouring the suspension liquid B into the solution A, and uniformly stirring and mixing; and performing vacuum drying and cooling in a casting mold to obtain the film. The method has the advantages that the agglomeration effect of h-BN is improved, and meanwhile, the method has the advantages of improving a polymer crystal phase and promoting lithium ion migration.

The invention discloses a pyroelectric gel film as well as a preparation method and application thereof. The pyroelectric gel is obtained by mixing polyvinyl alcohol, deionized water, an organic solvent and ionic salt according to a certain proportion, fully dissolving under a heating condition and carrying out multiple freezing-unfreezing circulating treatment. Gel is subjected to phase separation in the freezing-unfreezing process to form a polymer crystal structure. Polar molecules and polymer crystal structures contained in the gel endow the gel with high tensile and pyroelectric properties. When the two-end type flexible electronic device based on the pyroelectric gel is illuminated, due to temperature fluctuation formed in the photothermal effect device, molecular polarization is generated to generate pyroelectric current, and response to light is achieved. In addition, the conductivity of the device is changed when the device is deformed and the environment temperature or humidity is changed, so that the response to pressure, temperature or humidity is realized. The pyroelectric gel provided by the invention has an application prospect in the field of electronic devices such as flexible light, strain, temperature or humidity sensors and the like.

The invention discloses a polymer crystal constructed based on reversible N-B bonds and a preparation method, the polymer crystal is formed by triangular planar boron ester and 4-4 '-dipyridyl through the N-B bonds, and an asymmetric unit of the polymer crystal comprises one boron ester and 1.5 4-4'-dipyridyl; three B atoms in the triangular planar boron ester are respectively connected with N atoms in pyridine through reversible N-B bonds to finally form a polymer chain, and the chain also comprises a quadrilateral structure which takes four 4-4 '-bipyridyl as edges and takes a central benzene ring of the planar boron ester as a vertex. The polymer crystal can be applied to photocatalytic production of hydrogen peroxide. The dynamic reversibility of the bond allows the material to be self-corrected in the synthesis process, a highly-ordered crystal structure is formed, and meanwhile, the light absorption, charge separation and transmission efficiency is improved.

This invention belongs to the field of cement-based material admixture technology, specifically relating to a method for preparing and controlling the performance of a cement expansion agent. Addressing the current technical problems of large fluctuations in composition, unstable performance, and the need to prevent excessive expansion, this invention treats magnesium oxide through low-temperature calcination, surface treatment, and nano-encapsulation, introducing a highly active magnesium silicate mineral as an auxiliary expansion source. Simultaneously, it incorporates a bio-based polymer crystal form regulator to modify lignin sulfonate, used to control the crystallization process of hydration products. This achieves controllable and stable expansion performance, preventing drastic changes due to raw material fluctuations. While effectively compensating for concrete shrinkage, it avoids excessive expansion, preventing cracking and damage to the cement stone structure.

The invention discloses a synthesis method of nano-enzyme with monosaccharide oxidase-like activity based on a gold nanoparticle composite zirconium-based metal organic framework material. The metal organic framework material is a porous coordination high-molecular polymer crystal formed by coordination of metal ions and organic ligands. On the other hand, the metal organic framework material has the advantages of large specific surface area, high porosity, adjustable pore structure, high catalytic activity, open metal active sites, structural diversity and the like, so that the metal organic framework material is often used as a catalytic material or a carrier material of a catalyst. According to the invention, gold nanoparticles (Au NPs) are compounded on a zirconium-based metal organic framework material by reducing a compound containing gold in a positive electrovalence state or complexing ions, and the zirconium-based metal organic framework material can also be loaded on other loading materials, so that the nano enzyme with monosaccharide oxidase-like activity is obtained. The method has the advantages of simple operation, simple procedure and the like.

The invention provides a polymerizable precursor composition, polymer crystal gel and a preparation method and application thereof, and relates to the technical field of intelligent materials. The polymerizable precursor composition comprises a first monomer, a second monomer, polyethylene glycol and an initiator; the first monomer and the second monomer can be polymerized to form a cross-linked polymer network; the polyethylene glycol can be dispersed in the cross-linked polymer network and is at least partially in a crystalline state; the molecular weight of the polyethylene glycol is not less than 2000; the first monomer is an acrylic monomer; the second monomer is an acrylate monomer of ethylene glycol or ethylene glycol monomethyl ether. Autonomous crystallization of high-molecular-weight polyethylene glycol is regulated and controlled through a specific monomer network, spontaneous enhancement can be achieved at the room temperature without external triggering, and the problem that a traditional material depends on external stimulation and is unstable is solved. The modulus and the toughness of the material are remarkably improved through the unique microcrystal network structure, and high-strength self-adaptive bonding is achieved.

The invention discloses a roadbed recycled aggregate gradient proportioning method based on industrial waste residues, and belongs to the technical field of solid waste resource utilization and road engineering materials. In order to solve the problems that in the prior art, recycled aggregate is insufficient in strength, heavy metal leaching exceeds the standard, and the structure is uniform and cannot be matched with working conditions, steel slag, fly ash and the like are adopted as basic raw materials, and two key auxiliaries are introduced: one is a silicate-aminopolycarboxylic acid core-shell structure chelating excitant which can stably promote a hydration reaction to improve strength, and the other is a silicate-aminopolycarboxylic acid core-shell structure chelating excitant; the internal chelating group can also efficiently solidify heavy metal ions such as chromium and the like; 2, a pH response type polymer crystal form directing agent; the additive and the basic raw materials are mixed and molded, and then gradient humidity curing is carried out; according to the method, the aggregate spontaneously forms an upper-tough and lower-rigid gradient structure with a loose upper part and a compact bottom by utilizing the synergistic effect of the pH sensitivity of the guiding agent and the gradient humidity field, so that the method can better adapt to the working conditions that the top of the road base is pulled and the bottom is pressed, and the durability is improved; the recycled aggregate prepared by the invention has high mechanical strength, excellent environmental protection performance and a gradient functional structure.

The invention relates to the technical field of polymer crystallization, in particular to a method for regulating and controlling the crystal morphology of a butene / pentene copolymer. And heating the butylene / pentene copolymer to 180 DEG C, keeping the temperature for 10 minutes, cooling to an isothermal crystallization temperature, and keeping the temperature until the butylene / pentene copolymer is completely crystallized, thereby realizing regulation and control on the crystal morphology of the butylene / pentene copolymer. According to the invention, by adjusting the crystallization temperature and the content of a pentene copolymerization unit, the arrangement and stacking state of a macromolecular chain in the crystallization process is changed, so that different crystal morphologies are formed, and the crystal morphologies are related to the crystal form of the crystal. Meanwhile, the annular spherocrystal with the lamellar crystal synergistically twisted in the radial direction of the spherocrystal is obtained, and a feasible method is provided for morphology regulation and control and crystal form transformation regulation and control of existing butenyl polymer crystals.