616 results about "Active group" patented technology

The invention provides a diaphragm and a preparation method thereof and a lithium ion battery, the diaphragm comprises a porous support layer and a gradient functional layer, the porous support layer comprises a base membrane with the porosity of 45-60% and active groups modified on the surface of the base membrane, and the gradient functional layer comprises a heat conduction strengthening layer and an ion channel layer, the heat conduction strengthening layer comprises a first polymer and a modified boron nitride nanosheet, and the ion channel layer comprises a second polymer and a solid electrolyte nanowire. The porous supporting layer and the gradient functional layer are overlapped to form the composite diaphragm, so that high thermal stability, high wettability and high ion conductivity are synergistically realized, and formation of lithium dendrites can be inhibited.

The invention relates to the technical field of plastic material preparation, and discloses a modified bamboo fiber, a PBAT composite material and a plastic object. The modified bamboo fiber comprises bamboo fiber subjected to hot pressing treatment in water and a closed aziridine cross-linking agent loaded on the bamboo fiber, and the mass ratio of the bamboo fiber subjected to hot pressing treatment in water to the closed aziridine cross-linking agent is 100: (1-10). The PBAT composite material comprises the following components in parts by weight: PBAT and modified bamboo fibers, and the mass ratio of the PBAT to the modified bamboo fibers is 100: (20-40). The modified bamboo fiber is subjected to hot pressing treatment in water, so that the generation of volatile gas caused by high-temperature processing can be avoided when the modified bamboo fiber is applied to the plastic material, and the interface interaction with the plastic material can be improved; the closed aziridine cross-linking agent can release active groups at high temperature, and can react with active functional groups such as hydroxyl and carboxyl on the surfaces of the bamboo fibers and the surfaces of the plastic materials, so that the interface interaction between the bamboo fibers and the plastic matrix is improved, and the tensile strength of the composite material is improved.

The invention discloses a polytetrafluoroethylene compensator with good corrosion resistance and a preparation method thereof.The polytetrafluoroethylene compensator is composed of a corrugated pipe, a pipe connecting flange and an end flange, the pipe connecting flange and the end flange are located at the two ends of the corrugated pipe, the corrugated pipe is composed of a lining layer and a base material layer, and the base material layer is made of stainless steel; the preparation method comprises the following steps: firstly, carrying out surface grafting on nano aluminum oxide by using isocyanate silane, and introducing an active reaction group; then part of active groups react with benzotriazole, so that the corrosion inhibition and adhesion enhancement functions are realized; finally, enabling the residual active groups to react with hydroxylated polytetrafluoroethylene activated by alkali treatment, and coating a chemical inert layer on the surface of the residual active groups; the obtained core-shell structure functional filler is dispersed in epoxy resin to prepare a coating, and after the coating is coated on a stainless steel base material and cured, a high-performance compensator with high hardness, strong adhesive force, excellent corrosion resistance and weather resistance is formed.

The invention relates to the technical field of alloys, and discloses a high-strength silver-copper alloy and a preparation method thereof. The acidified carbon nanotubes are subjected to functional modification, methylbenzene-2, 4-diisocyanate reacts with surface active groups of the methylbenzene-2, 4-diisocyanate to introduce-NCO groups, then through hydroxyl reaction of-NCO and 4-hydroxyphthalic acid, a plurality of carboxyl groups are grafted on the surfaces of the carbon nanotubes, the carboxyl groups can firmly adsorb lanthanum nitrate through a coordination effect, and meanwhile, the carboxyl groups can also adsorb lanthanum nitrate through a coordination effect. The rare earth elements are prevented from being separated from the raw materials in the ball milling process, uniform distribution is ensured, the agglomeration tendency of the carbon nanotubes can be reduced, and the dispersity of the carbon nanotubes in the silver-copper alloy is improved; the carbon nanotubes have extremely high axial strength and excellent conductivity, the mechanical and electrical properties of the alloy material can be enhanced through load transfer and a conductive network effect, rare earth lanthanum is segregated at a grain boundary to form a pinning effect to refine grains, the alloy strength is further improved, and finally collaborative improvement of the strength and the conductivity of the silver-copper alloy is achieved.

The invention discloses a DNA synthesis method which comprises the following steps: processing an initial substrate according to a preset strategy to obtain a target substrate with a Mark pattern and a plurality of reaction sites, and adjusting the positions of the target substrate and an ink-jet printing device through the Mark pattern, so that the working directions of a reaction unit array and the device are consistent, and the subsequent operation accuracy is ensured; deprotecting the reaction sites to generate active groups; sequentially spraying a target monomer solution and an activator solution into the reaction sites of the preset area after deprotection treatment through an ink-jet printing device, and carrying out a coupling reaction with the active groups to obtain a mixed solution containing a nucleotide chain; carrying out cleaning, oxidation, capping and deprotection treatment on the mixed solution to obtain a single-layer base product; according to the target base sequence, determining a corresponding target monomer solution, and circularly carrying out a reaction to obtain a mixed solution containing a nucleotide chain; and obtaining the synthesized DNA according to the mixed solution. According to the method, high-throughput, high-quality and high-efficiency DNA synthesis can be realized.

The invention provides modified liquid epoxy resin, a liquid molding compound and a preparation method and application thereof, the modified liquid epoxy resin has a hard segment-soft segment-hard segment structure, the hard segment is composed of liquid epoxy resin, and the soft segment is composed of a flexible chain segment organic matter with an active group at the tail end. The liquid molding compound comprises the following components in percentage by mass: (A) 10-20% of the modified liquid epoxy resin; (B) 5-15% of a curing agent; (C) 70-90% of a filler; and (D) 0.1 to 1.5 percent of curing accelerator. The modified liquid epoxy resin provided by the invention can effectively reduce the crosslinking density, is beneficial to molecular movement, finally achieves the effects of reducing stress and shrinkage characteristics, can improve the toughness of a liquid plastic package material when being applied to the liquid plastic package material, reduces the internal stress and thermal expansion coefficient of the epoxy plastic package material, and has more excellent processability and process reliability.

The invention belongs to the technical field of building materials, and provides a cement-based composite material with an organic-inorganic interpenetrating structure and a preparation method of the cement-based composite material. According to the preparation method disclosed by the invention, the monomer and the polymer containing the active group are introduced, the in-situ polymer formed by the monomer through in-situ polymerization and the polymer containing the active group form a double-network polymer, a single-network structure is refined, and the single-network structure and a cement hydration reaction product which is synchronously performed form an organic-inorganic interpenetrating structure; the interaction between double networks and the cement-based material is enhanced, meanwhile, the microstructure is optimized, the mechanical property of the single polymer modified cement-based material can be improved, the compressive strength is improved, and the breaking strength is further enhanced; the prepared cement-based composite material with the organic-inorganic interpenetrating structure has excellent breaking strength and compressive strength.

The invention discloses a bacteriostatic food packaging bag and a preparation method thereof, and relates to the technical field of food packaging, the bacteriostatic food packaging bag comprises the following components by weight: 12-22 parts of bamboo fiber; 55 to 80 parts of TPS (Thermoplastic Polystyrene); 15-20 parts of a modified ethylene composite copolymer; 15 to 20 parts of modified chitosan; wherein the modified ethylene composite copolymer is obtained by polymerizing active group-containing ethylene and one of vinyl acetate, butene, hexene or octylene according to a molar ratio of 10: (3-6); the active group is at least one of amino and sulfonic acid group; the modified chitosan is sulfo-grafted chitosan, and the mass grafting rate is greater than 0.1 wt%. The preparation method has the advantages that the compatibility of a composition formula is improved through the modified ethylene composite copolymer and the modified chitosan, a uniform net structure is formed in a cross-linking reaction to serve as a supporting framework, the overall mechanical structure performance is enhanced through the bamboo fibers which are synergistically and uniformly distributed in the composition formula, and the degradable and non-toxic effects are achieved through the cooperation of the bamboo fibers and the TPS.

The invention relates to a preparation, regulation and control method of a thermoplastic elastomer encapsulating material in the technical field of new materials, which comprises the following steps: realizing an in-situ reaction process by controlling the concentration and reaction temperature of reactive functional groups in the encapsulating material according to an interface reaction rate constant and active group distribution density; if the reaction conversion rate reaches a preset value, a chemically bonded interface bonding layer is formed; monitoring the stress distribution state in the rubber coating layer by adopting a stress analysis algorithm, and when detecting that local stress concentration exceeds the yield strength of the material, dispersing a stress concentration area by adjusting the length of a flexible chain segment and the density of a rigid cross-linking point in a cross-linking network; and deformation data and a bonding strength change trend of the interface bonding layer in the temperature cycling process are obtained, if the bonding strength attenuation rate exceeds a preset threshold value, a dynamic cross-linking mechanism is activated, and the dynamic equilibrium state of interface bonding is maintained through fracture and recombination of a reversible covalent bond.

The invention relates to the technical field of anti-aging coatings, in particular to a tire anti-aging coating and a preparation method thereof. According to the invention, the problems of poor adhesive force and poor aging resistance of a tire coating are solved; through the synergistic effect of the epoxy polysiloxane and the waterborne polyurethane-acrylate copolymer emulsion, multi-stage bonding of a tire / coating interface is realized, and the added fluorosilicone block copolymer can further form a protective barrier; by preparing modified nano silicon dioxide, active groups grafted by a silane coupling agent on the surface capture free radicals, and an oxidation chain reaction is blocked; n, N '-diphenyl-p-phenylenediamine released by the polyurea microcapsules can remove free radicals generated by oxidation in the coating, and the N, N'-diphenyl-p-phenylenediamine is matched with the compound light stabilizer to form a dynamic defense chain; a flexible long chain of the polycaprolactone polyol inhibits crack propagation through free volume filling, and the four components synergistically improve ultraviolet resistance, ozone resistance and oxidation corrosion resistance; and through a staged low temperature-medium temperature-high temperature gradient curing strategy, the adhesive force of the coating is improved.

The invention relates to the technical field of foaming materials, in particular to a shoe material preparation process for finished shoes based on supercritical physical foaming and the finished shoes. The preparation method comprises the following steps: 1) weighing a matrix, octadecyl polyhedral oligomeric silsesquioxane, an active group-containing styrene-acrylonitrile copolymer, a polydimethylsiloxane block copolymer, an epoxy functional group-containing olefin copolymer, a nano silicon dioxide dispersion and a processing aid, uniformly mixing, blending, extruding, granulating and drying to obtain a blended material, wherein the matrix, the octadecyl polyhedral oligomeric silsesquioxane, the active group-containing styrene-acrylonitrile copolymer, the polydimethylsiloxane block copolymer, the epoxy functional group-containing olefin copolymer, the nano silicon dioxide dispersion and the processing aid are mixed uniformly; the preparation method comprises the following steps of (1) preparing a polymer, (2) plasticizing the blended material to form a preformed blank, injecting supercritical gas, and fully dissolving the supercritical fluid in the polymer at the temperature of 150-180 DEG C and the pressure of 10-20MPa for 1-3 hours, (3) reducing the pressure to normal pressure within 10 seconds at the pressure reduction rate of less than or equal to 2MPa / s, and (4) cooling and shaping at the temperature of 60-80 DEG C to obtain the shoe material.

The invention discloses a bionic self-crimping material and application in the nerve field, and relates to the technical field of nano materials. The preparation method comprises the following steps: firstly, carrying out ultraviolet photopolymerization on acrylic acid and acrylic acid-N-hydroxysuccinimide, adding chitosan and glutaraldehyde to form hydrogel, and introducing epigallocatechin gallate into a chitosan-acrylic acid network. The material is rapidly and autonomously curled into a tube shape after being in contact with wet nerves, glutaraldehyde is directionally and orderly diffused by adopting a three-channel micro-fluidic chip, and the fineness is improved, so that the matching degree of nerve broken ends with different thicknesses is increased; the surface active groups of the material and the natural component chitosan cooperate to realize suture-free fixation; the plant phenol antioxidant removes free radicals at nerve injury parts; the degradation period is synchronous with natural healing of nerves, and secondary operation for taking out is not needed. The electroneurographic signals using the material are transmitted more smoothly, the target muscle atrophy degree is reduced, and the limb movement function is recovered to be close to the normal level.

The invention relates to the field of sealing materials, in particular to a heat-resistant and oil-resistant sealing gasket for an engine and a preparation method of the heat-resistant and oil-resistant sealing gasket. The liquid silicone rubber is prepared from the following raw materials in percentage by weight: 60-80% of a liquid silicone rubber base material, 15-28% of an oil-resistant heat-resistant base material, 0.1-3% of a cross-linking agent, 0.1-0.6% of a catalyst and the balance of a processing aid, the oil-resistant and heat-resistant base material is prepared from an inorganic filler, aramid pulp, polyhedral oligomeric silsesquioxane-alcoholic hydroxyl group, an activation dispersant and a double-active-group-epoxy silane coupling agent; the activation dispersant is a trihydroxymethyl caprolactone cross-linked polymer and / or bis (pinacol) borate; and the inorganic filler is composed of a plurality of components selected from fumed silica powder, nano-scale ceramic powder and zinc borate nano-powder. The oil-resistant and heat-resistant base material obtained by the scheme interacts with the silicone rubber base material, so that the prepared heat-resistant and oil-resistant sealing gasket for the engine has better comprehensive performance.

The invention discloses a phthalimidic acid hapten, an artificial antigen, an antibody, and a preparation method and application of the phthalimidic acid hapten and the artificial antigen. The structure of the phthalimide acid hapten is shown as a formula (I), and the phthalimide acid hapten is obtained by introducing a carboxyl active group with a spacer arm with a certain length to carboxyl of phthalimide acid, so that the phthalimide acid hapten can be coupled with carrier protein to obtain an artificial antigen for immunization; the phthalimide hapten retains all characteristic groups of the phthalimide, the original structural characteristics of the phthalimide are changed to the minimum extent, and a foundation is laid for generating an antibody with higher specificity and higher sensitivity for subsequently stimulating animal immune response. An artificial antigen and a phthalimide acid monoclonal antibody are prepared through the hapten, indirect competitive ELISA based on the monoclonal antibody has the lowest detection limit of phthalimide acid of 2.44 ng / mL, IC50 of 17.29 ng / mL and the linear range of 5.02-59.51 ng / mL, the detection sensitivity is high, and the linear range is wide.

The invention discloses a lignin intercalation two-dimensional nano material as well as a preparation method and application thereof, and relates to the technical field of macromolecules. The preparation method of the lignin intercalation two-dimensional nano material comprises the following steps: adding biomass powder into a deep eutectic solvent for reaction, and centrifuging after the reaction is completed to obtain an upper lignin extracting solution; adding the upper-layer lignin extracting solution into the two-dimensional nanosheet dispersion liquid, stirring, and centrifugally washing after the stirring reaction is completed to obtain a precipitate; and freeze-drying the precipitate to obtain the lignin intercalation two-dimensional nano material. According to the method, the lignin and the two-dimensional nano-material are compounded through static electricity, hydrogen bonds and pi-pi interaction by utilizing the hydroxyl and aromatic structure of the lignin, and in addition, the hydroxyl functional group of the lignin and the active group on the surface of the two-dimensional nano-sheet can jointly adsorb lead ions.

The invention discloses flame-retardant polyurethane foam containing a halogen-free phosphorus flame retardant and a preparation method of the flame-retardant polyurethane foam. The flame-retardant polyurethane foam comprises the following components in percentage by weight: 60-150 parts of isocyanate, 100 parts of polyol, 10-30 parts of a phosphorus flame retardant composition and 5-38 parts of an auxiliary agent, and the density of the flame-retardant polyurethane foam is 10-120kg / m < 3 >; the phosphorus flame retardant composition comprises a phosphaphenanthrene flame retardant and a phosphate flame retardant, the phosphaphenanthrene flame retardant is a derivative of 9, 10-dihydro-9-oxa-10-phosphaphenanthrene oxide, and the phosphate flame retardant is poly-type phosphate; according to the invention, the phosphaphenanthrene derivative flame retardant with the active group hydroxyl and the polyphosphate type flame retardant are compounded and then used for flame retardant polyurethane foam, and the obtained polyurethane foam has the advantages of good flame retardant property, high oxygen index, good flame retardant property, good stability, excellent mechanical properties and good dimensional stability, and the flame retardant is not easy to migrate out.

The invention relates to the technical field of agriculture, and discloses a synergistic technology for repairing soil and promoting plant stem cells by using modified amino active groups. Comprising the following steps: modifying an amino acid compound, namely modifying active groups in amino acid and fulvic acid, so that the active groups have a synergistic effect with cellulase, hemicellulase, urease, phosphatase, chitinase, beta-glucanase, superoxide dismutase, peroxidase and catalase; through the strong chelation of the modified amino active groups and heavy metal ions in soil, the bio-availability and mobility of heavy metals can be effectively reduced, for example, the chelation removal rate of cadmium, lead and other heavy metals can reach 40% or above, the heavy metal contaminated soil is repaired, the soil structure is improved, the content of organic matters in the soil is increased, and the pH value of the soil is adjusted; the acidified or alkalized soil is gradually restored to a pH range suitable for plant growth, and the water and fertilizer retention capability of the soil is improved.

The invention relates to a plasma active group and microbial cell membrane action analysis system, which comprises a plasma active group diagnosis module used for acquiring plasma active group data under different conditions, and the group data comprises the type, concentration and spatial distribution of active groups; the microbial characterization analysis module is used for acquiring cell membrane data before and after plasma treatment, and the cell membrane data comprises morphological structure, component and functional change of cell membranes; and the machine learning data analysis module is used for carrying out data preprocessing, feature extraction and importance sorting on the acquired plasma active group data and cell membrane data so as to select important features to carry out regression analysis and obtain a nonlinear correlation model of the action of the plasma active group and the cell membrane. Compared with the prior art, the method has the advantages that the interaction effect and mechanism of the plasma active group and the microbial cell membrane can be quickly and accurately analyzed and predicted, and the research efficiency and precision are remarkably improved.

The invention discloses a preparation method of a warm-keeping and health-care composite fabric, and relates to the technical field of functional fabrics. The preparation method comprises the following steps: firstly, combining fumed silica with graphene oxide hydrogel to prepare mixed aerogel; the mixed aerogel is combined with allyl trichlorosilane, and is grafted to a macromolecular chain of polypropylene through maleic anhydride, so that the compatibility is improved, and the agglomeration problem is solved; secondly, calcining tourmaline, then directly carrying out quenching hydration modification, combining Si-OH groups on the surface with active groups in a polyester molecular chain, and spinning into hollow fibers; the mixed aerogel can absorb far infrared rays dissipated and emitted by the modified tourmaline, and the aerogel absorbing the far infrared rays can generate a resonance effect and a warm effect and permeate into the deep layer of the skin; the modified tourmaline has the capability of generating negative ions, and the gull rock powder is added for combined action, so that the antibacterial effect is achieved by destroying the structure of bacteria, and the health-care effect is achieved. The composite fabric prepared by the invention has warm-keeping and health-care effects.

The invention provides a reactive dye with a high fixation rate and a preparation method thereof. The reactive dye is prepared from the following raw materials in parts by mass: 25 parts of modified reactive dye, 0.3-0.7 part of a metal ion agent and 60-80 parts of water, wherein the modified reactive dye is obtained by inclusion of reactive dye molecules with beta-cyclodextrin-pyridine carboxylic acid, and beta-cyclodextrin and pyridine carboxylic acid in the beta-cyclodextrin-pyridine carboxylic acid are connected through an alkyl chain; metal ions provided by the metal ion agent can be chelated with the picolinic acid. Reactive dye molecules and beta-cyclodextrin-pyridine carboxylic acid form an inclusion structure, the hydrolysis probability of active groups is reduced, and an alkyl chain regulates steric hindrance and molecular spacing, so that pyridine nitrogen and carboxylic acid more efficiently form a more stable chelate with metal ions and further form coordinate bonds with hydroxyl groups on the fiber surface, and the fixation rate of the reactive dye is improved.

The invention provides a polymer composition, a polymer film material, a holographic grating, a preparation method of the holographic grating, an optical film material and display equipment. The polymer composition comprises a first polymerizable monomer, a second polymerizable monomer and a film-forming resin. The first polymerizable monomer is a non-liquid crystal monomer; the second polymerizable monomer is a liquid crystal monomer, the second polymerizable monomer comprises an active group, and the second polymerizable monomer can be subjected to a copolymerization reaction with the first polymerizable monomer through the active group under illumination. The refractive index modulation degree of the optical film material can be improved by using the polymer composition.

The invention belongs to the technical field of biological materials, and particularly relates to a high-performance biological material based on hydroxypropyl-beta-cyclodextrin and a preparation method of the high-performance biological material. Comprising the following steps: mixing aminated carbon nanotube dispersion liquid and cellulose dispersion liquid to obtain a mixed solution; adding an ionic cross-linking agent into the mixed solution, and gelatinizing to obtain primary conductive hydrogel; and fully soaking the primary conductive hydrogel with deionized water to prepare the conductive hydrogel. The aminated carbon nanotubes and the carboxylated cellulose nanofibers have relatively large length-diameter ratios, and can be mutually staggered to form a skeleton of the hydrogel so as to form a rigid interpenetrating network structure. And hydrogen bonds or chemical bonds formed among active groups contained in the aminated carbon nanotubes, the carboxylated cellulose nanofibers and the hydroxypropyl-beta-cyclodextrin are beneficial to maintaining the stability of the gel structure and improving the compression strength and the conductivity of the gel.

The invention provides a fiber reinforced resin composite material and a preparation method thereof, composite resin and a protective product. The fibers are subjected to surface roughening and / or active groups are introduced to form modified fibers, and the active groups comprise one or more of hydroxyl, alkenyl, alkynyl, amino and halogen; coating the surfaces of the modified fibers with a thermoplastic resin solution grafted with maleic anhydride groups and / or epoxy groups, and performing heat treatment to form a first functional layer; nano particles are attached to the surface of the first functional layer and / or a supramolecular network structure is formed, and a second functional layer is formed. According to the preparation method, the interface bonding performance between the fiber and the resin is remarkably improved, and the prepared fiber-reinforced resin composite material has excellent strength, barrier performance, protection performance and the like.

The invention relates to the technical field of sound insulation cotton, and discloses high-strength sound insulation cotton and a preparation method thereof.The sound insulation cotton is prepared by taking polylactic acid as a base material and a diatomite modifier and the like as additives through mixing, extrusion, spinning and needling processes, the macromolecular substance can act with an active group at the tail end of a polylactic acid molecular chain in the subsequent melt extrusion process, so that organic connection between the diatomite and the polylactic acid molecular chain can be realized while the chain extension effect on polylactic acid is realized, and therefore, the interfacial compatibility between the diatomite and the polylactic acid molecular chain is greatly improved; further, the mechanical property of the polylactic acid sound insulation cotton is effectively improved, the sound insulation effect of the polylactic acid sound insulation cotton can be improved through the rich pore structure of the kieselguhr, in addition, the macromolecular substance structure contains rich nitrogen and phosphorus flame-retardant elements, and the flame-retardant property of the sound insulation cotton can be effectively improved.

The invention belongs to the technical field of aerogel materials, and particularly relates to modified polyamide acid aerogel as well as a preparation method and application thereof. Comprising the following steps: preparing POSS modified polyamide acid by taking dianhydride, diamine and a polyamino POSS monomer as raw materials; adding the POSS modified polyamide acid into deionized water, and precipitating to obtain POSS modified polyamide acid powder; adding the POSS modified polyamide acid powder and an organic alkaline compound into deionized water, and carrying out sol-gelation to obtain POSS modified polyamide acid hydrogel; and drying the POSS modified polyamide acid hydrogel, carrying out partial thermal imidization, and crushing to obtain the modified polyamide acid aerogel. A large number of active groups are still reserved on the aerogel, so that the compatibility of the aerogel and an adhesive is improved, and the aerogel adopts two modes of pore infiltration and active group connection to enhance the mechanical property of the adhesive.

This invention discloses a method for synergistic surface modification of tungsten-copper powder to inhibit the decomposition of polyoxymethylene (POM), belonging to the field of polymer material anti-degradation modification technology. This invention addresses the problem that tungsten-copper powder easily catalyzes the severe degradation of POM during PIM tungsten-copper feedstock mixing and injection molding, leading to poor feedstock flowability, injection instability, large fluctuations in product size and weight, and low yield. First, the tungsten-copper powder is activated by low-temperature plasma etching to construct a reaction interface. Then, a silica barrier film is prepared using tetraethyl orthosilicate as the silicon source and modified with fluorosilicone, loaded with a metal soap neutralizer, grafted with a hindered phenolic antioxidant, and simultaneously introduced with epoxy active groups to construct a multi-component synergistic degradation inhibition system. This invention, through multi-step synergistic modification, precisely controls the modification process, comprehensively inhibiting POM decomposition. When the modified powder is blended with POM, a capping reaction occurs, blocking the unzipping degradation pathway of POM, improving the compatibility of the filler and the matrix, and ensuring the continuous and stable preparation and injection molding of PIM tungsten-copper feedstock.

The invention provides an addition type organic silicon pressure-sensitive adhesive composition and an addition type organic silicon pressure-sensitive adhesive product. The composition comprises methyl vinyl polysiloxane; a methyl MQ silicone resin; a hydrogen-containing silicone oil crosslinking agent; a release force enhancer; an inhibitor; a solvent; the stripping force reinforcing agent is a double-bond compound containing hydroxyl or alkoxy silane. According to the invention, a double-bond compound containing hydroxyl or alkoxy silane is used as a stripping force reinforcing agent of the addition type organic silicon pressure-sensitive adhesive, and active groups such as hydroxyl and alkoxy silane can be bonded with an adhered object through hydrogen-bond interaction or hydrolytic condensation, so that the stripping strength of the pressure-sensitive adhesive on the adhered object is enhanced; wherein the double bonds can enable the stripping force enhancer to be combined in the pressure-sensitive adhesive through covalent bonds, so that the precipitation of small molecules is greatly reduced, and the stability of the stripping force can be effectively improved. Experimental results show that the stripping force of the pressure-sensitive adhesive on a steel plate can reach 2192 g / inch, and the stripping force is still kept at 2146 g / inch after the pressure-sensitive adhesive is aged for 14 days.

The invention discloses a polyolefin graft modification method based on coating and photochemical reaction, which comprises the following steps: step 1, raw material preparation: mixing 20-50 parts by weight of glycidyl methacrylate (GMA), 1-5 parts by weight of benzophenone (BP) and 1-2 parts by weight of triethylamine (TEA), and uniformly stirring to obtain a mixed solution; 2, coating: coating the surface of a polyolefin film with the mixed solution obtained in the step 1, wherein the coating weight is 1g / m < 2 >-3g / m < 2 >; the method has the beneficial effects that a peroxide initiator is not needed, the reaction is initiated by ultraviolet light, the reaction condition is mild, polyolefin degradation and side reaction are reduced, and the grafting rate is greater than 3.5%; ethyl acetate and other low-toxicity solvents are adopted, residual solvents can be removed through oven treatment, and the environment-friendly requirement is met; active groups such as an epoxy group are introduced into a grafted product, so that the compatibility with a polar material is remarkably improved, and the breaking strength is improved by more than 50% compared with that of common PP; the polyolefine can be used as an interface compatibilizer, a macromolecular coupling agent and the like, and the application of the polyolefine in the high-end field is expanded.

The invention provides an alcohol insect pheromone derivative, which takes a compound containing at least one active group such as carboxyl and amido as a carrier, and alcohol insect pheromone forms derivatives such as ester derivatives and anhydride derivatives with the compound through chemical reaction. The invention also provides a preparation method, application and a release method of the alcohol insect pheromone derivative. According to the alcohol insect pheromone derivative, alcohol insect pheromone is treated in a chemical reaction mode, the stability of the alcohol insect pheromone can be remarkably improved, slow release and controlled release of the pheromone can be achieved, the carrier material is wide in source, multiple in selectivity, convenient to use and economical, and in addition, the alcohol insect pheromone derivative can be used for preparing the alcohol insect pheromone derivative. The alcohol insect pheromone derivative provided by the invention can also realize combined release of various pheromones, so that trapping, prevention and control of various insects can be realized.

The invention discloses a powdery emulsion explosive with eutectic inorganic salt as an internal phase and a preparation method, and relates to the technical field of powdery emulsion explosives, the powdery emulsion explosive comprises the following raw materials by weight: 90-110 parts of eutectic inorganic salt and 5-7 parts of a composite oil phase; wherein the eutectic inorganic salt is prepared by recrystallizing ammonium nitrate and sodium chloride. Ammonium nitrate and sodium chloride are combined in a recrystallization manner, so that sodium chloride is uniformly distributed in ammonium nitrate crystals in a lattice doping manner, a molecular-level dispersion effect is realized, and the flame inhibitor is more uniformly dispersed in an inner phase; secondly, the eutectic inorganic salt has a synergistic decomposition peak at 210-240 DEG C, and chloride ions are released in advance to interact with active groups generated by explosion; under the combined action of the two factors, sodium chloride is used as a flame inhibitor to play a role more effectively at the flame front, the flame temperature is reduced, and flame propagation is inhibited.