438 results about "Caprolactone" patented technology

The invention discloses a biodegradable polylactic acid composite material and a preparation method thereof, and relates to the technical field of polylactic acid materials. The method comprises the steps that firstly, chitosan activated through hydrochloric acid is subjected to graft modification through a KH550 silane coupling agent, meanwhile, nano-zinc oxide is subjected to surface modification through stearic acid, the chitosan and the nano-zinc oxide are mixed, spray drying is conducted, and antibacterial composite powder is prepared; the preparation method comprises the following steps: performing hydrochloric acid activation and KH570 silane coupling agent modification on nano silicon dioxide, performing hydroxypropylation modification on alkali lignin, and performing reflux crosslinking reaction on the modified alkali lignin, KH570 modified nano silicon dioxide, polycaprolactone, methyl methacrylate and azodiisobutyronitrile to prepare a heat-resistant reinforcer; uniformly mixing polylactic acid, poly (butylene succinate), the antibacterial composite powder, the heat-resistant reinforcer, tributyl citrate, polyethylene glycol and talcum powder, and extruding and granulating by using a twin-screw extruder to obtain the heat-resistant antibacterial material. The composite material prepared by the invention has excellent antibacterial property, heat resistance and biodegradability.

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

The invention provides a preparation method of an acoustic / photosensitizer-manganese dioxide nanoparticle and a product thereof. According to the method, firstly, a potassium permanganate reduction method is adopted to precisely synthesize the high-purity MnO2 nano-substrate, and according to the method, the size uniformity and dispersion stability of nano-particles can be precisely controlled by regulating and controlling the pH value and temperature of a reaction system and the concentration of a reducing agent. On the basis, amphiphilic high-molecular polyethylene glycol-polycaprolactone (PEG-PCL) is modified on the surface of the MnO2 nanometre. The whole preparation process is green and mild, and complex equipment is not needed; the reaction conditions are mild, nanoparticles are uniform, and the acoustic / photosensitizer can be combined and applied to an imaging technology to realize real-time monitoring.

The present invention belongs to the technical field of petrochemical catalysis, and relates to a preparation method for improving the stability of a Cu-Beta zeolite catalyst for preparing caprolactam from caprolactone, and the use thereof. In the present invention, a cavity-modified dealuminated Beta zeolite is used as a carrier, and copper is loaded in pore channels of the zeolite carrier by means of an improved ammonia distillation method. The cavity modification refers to subjecting the dealuminated Beta zeolite carrier to a desiliconization technique controlled by the use of a weak organic base so as to enlarge silanol nests generated by dealumination of the dealuminated Beta zeolite carrier, thereby better accommodating and stabilizing the nano and sub-nano copper particles. The core of the improved ammonia distillation method involves impregnating a zeolite carrier with an equal volume of a copper-ammonia complex solution, such that the copper-ammonia complex mainly undergoes, during ammonia distillation, a reaction of depositing copper hydroxide in zeolite pore channels, thereby improving the sintering resistance. The Cu-Beta catalyst prepared using the method provided by the present invention exhibits high activity, selectivity and stability when applied to the reaction of caprolactam prepared from caprolactone via gas-solid phase hydroamination.

The application discloses a degradable cotton soft towel and a preparation method thereof, relates to the technical field of fiber composite materials, and belongs to the patent classification D01F8 / 02. The preparation method comprises the following steps: performing alkali treatment and enzymolysis on Egyptian long-staple cotton fibers to obtain pretreated cotton fibers, and preheating, stretching and setting poly-caprolactone fibers to obtain pretreated poly-caprolactone fibers; mixing and opening the two kinds of fibers, and then air-laying to form a fiber web; constructing a super water-absorbing network by impregnating a main network solution carboxymethyl chitin and oxidized cellulose nanofilament and an auxiliary network dispersion liquid calcium alginate gel microspheres and a hyaluronic acid crosslinking body; forming micron protrusions through hexagonal nickel template hot pressing, and obtaining a base by electrostatic spraying modification of nano silicon dioxide; and obtaining the cotton soft towel through vacuum drying, slitting and sterilization after spraying of an essence liquid. The cotton soft towel has excellent water absorption performance through the synergistic effect of multistage pores, a super water-absorbing network and micro-nano surface modification, and the poly-caprolactone fibers and the cotton fibers used in the cotton soft towel are mixed, and both have good biodegradability.

The invention discloses polycaprolactone dihydric alcohol containing maleimide groups and a preparation method and application thereof, and the preparation method of the polycaprolactone dihydric alcohol comprises the following steps: adding N-(2, 3-dihydroxy propyl) maleimide, caprolactone and a catalyst into a reaction container, carrying out high-temperature reaction for 12-18 hours, filtering, washing, and drying to obtain the polycaprolactone dihydric alcohol containing the maleimide groups. And cooling and discharging to obtain the polycaprolactone diol containing the maleimide group. The polycaprolactone diol containing the maleimide group is used as a raw material to prepare a polyurethane prepolymer, so that the side chain of the prepolymer is provided with the maleimide group, and then a difuran compound is introduced as a dynamic cross-linking agent to obtain the self-repairing polyurethane elastomer containing the Diels-Alder bond. Through the reversible Diels-Alder (D-A) reaction effect of the functional components, the polyurethane elastomer can be remodeled and recycled, and the polyurethane elastomer has excellent and stable mechanical properties, self-repairing efficiency and repeated self-repairing capability.

The invention provides a composite antifouling system coating as well as a use method and application thereof. The coating sequentially comprises a bottom layer, a copper-containing middle layer and a surface layer in the direction from near to far away from a base material, wherein the copper-containing middle layer comprises 20-30 parts of self-polishing acrylic silicon resin, 5-10 parts of lime rosin, 8-12 parts of zinc oxide, 30-50 parts of cuprous oxide, 2-3 parts of a compound antifouling agent, 0.5-1 part of a thixotropic agent and a first diluent. The surface layer is prepared from 30 to 35 parts of caprolactone and lactic acid grafted linear polyester, 5 to 10 parts of highly hydrolyzed N-(hydroxymethyl) acrylamide (NMA) modified acrylic resin, 15 to 20 parts of copper-free organic antifouling agent, 5 to 12 parts of polytetrafluoroethylene micro powder, 2 to 3 parts of dispersing agent and second diluent. The high-hydrolysis copper-free surface layer forms an isolation barrier, so that the copper-containing middle layer is prevented from being in direct contact with air, and the problem that the antifouling efficiency is reduced due to the fact that water is not discharged for a long time after coating is solved; the stable hydrolysis rate of the surface layer resin can ensure the continuous release of the organic antifouling agent, and the copper-containing intermediate layer can provide deep antifouling guarantee and synergistically realize long-acting antifouling.

The invention relates to the technical field of high-performance polyester, and discloses a modified preparation method of functionalized antibacterial polyester fibers, which comprises the following steps: S1, graphene is treated by oxygen-argon mixed plasma to obtain hydroxylated graphene; s2, after hydroxylated graphene is dispersed, cerium nitrate and sodium citrate are added, and cerium-based metallized graphene is obtained; s3, carrying out a reaction on the cerium-based metallized graphene and 3-(2-aminoethylamino) propyltrimethoxysilane, so as to obtain aminated graphene; s4, aminated graphene dicyandiamide, ammonium chloride tetraethoxysilane and hexadecyl trimethyl ammonium bromide are subjected to a reaction, and guanidyl-meso-porous silicon-metal composite graphene is obtained; s5, reacting the product with epsilon-polylysine and polycaprolactone to obtain a modified composite antibacterial agent; s6, treating the polyester fibers with a mixed solution of alkali and a surfactant; s7, the polyester fibers react with a solution containing an antibacterial agent, tetrabutyl titanate, an initiator and a dispersing agent, and a finished product is obtained.

The application belongs to the field of solid waste plastic resource utilization, and discloses a method for depolymerization and recovery of polycaprolactone by low-temperature plasma coupling catalysis. Polycaprolactone particles are subjected to plasma discharge treatment together with a catalyst to make the polycaprolactone particles depolymerize, thereby realizing the depolymerization and recovery of polycaprolactone. The application utilizes the Joule heat generated by plasma discharge to liquefy polycaprolactone, and after liquefaction, the polycaprolactone fully contacts the active sites of the catalyst, and meanwhile, under the action of active free radicals generated by plasma treatment and the catalyst, realizes fast polycaprolactone depolymerization and recovery without external heat source, solvent and pressure. The complete conversion of polycaprolactone is realized within 1 hour, and the yield of gamma-caprolactone monomer can be as high as 88.9%, which is significantly better than the current solvent thermal method.

This invention discloses a method for preparing poly(glycolic acid-caprolactone) copolymers, belonging to the field of polymer synthesis technology. The method includes: prepolymerizing ε-caprolactone with a catalyst and initiator at 40–60°C below the melting point of glycolide under an inert atmosphere; adding glycolide and heating to 160–220°C for the main polymerization reaction; after the reaction, dissolving, precipitating, washing, and drying to obtain the poly(glycolic acid-caprolactone) copolymer. This invention utilizes the physical difference in melting points between glycolide and ε-caprolactone, preferentially prepolymerizing ε-caprolactone at a temperature below the melting point of glycolide, resulting in a higher conversion rate of ε-caprolactone than glycolide in the initial stage of the main polymerization, effectively controlling the copolymerization reaction pathway. Using this method, copolymers with a weight-average molecular weight of not less than 100,000 Da and an intrinsic viscosity of 1.8–3.5 dL / g can be obtained within a wide range of glycolide molar content from 15% to 85%, and the degradation behavior is stable and controllable. This method is simple and requires no special equipment or chain extender, making it suitable for the large-scale preparation of medical materials such as absorbable sutures and tissue repair scaffolds.

The application provides a preparation method of a polyurethane foaming material. The preparation method comprises the following steps: firstly, pre-polymerization of polytetrahydrofuran ether glycol and hexamethylene diisocyanate; then, mixing, extruding, and granulating of polyhexalactone dihydric alcohol and a catalyst to obtain polyurethane granules. The granules are dried and injection molded into a small embryo to be foamed. The small embryo is immersed in supercritical carbon dioxide, nitrogen is introduced for auxiliary foaming, and gradient pressure relief control is implemented in the foaming process. After foaming, curing treatment is performed to obtain the polyurethane foaming material. The preparation method is beneficial to improving the cell uniformity of the polyurethane foaming material and improving the performance stability of the material after rebound, compression, and aging.

The invention provides a high-pressure wear-resistant valve rubber. The valve rubber is prepared from the following raw materials in parts by weight: 100 parts of a polyurethane prepolymer, 20 to 30 parts of a chain extender, 12 to 18 parts of a polycaprolactone coated boron nitride / molybdenum disulfide composite material and 0.5 to 2 parts of an antioxidant. Wherein the polycaprolactone coated boron nitride / molybdenum disulfide composite material is obtained by polymerizing an amino silane coupling agent modified boron nitride / molybdenum disulfide composite material, triethyl aluminum and epsilon-caprolactone in an organic solvent at 35-45 DEG C in an inert atmosphere. A polycaprolactone-coated boron nitride / molybdenum disulfide composite material is used as a filler, and boron nitride / molybdenum disulfide as an inner core forms a synergistic structure of a reinforced substrate and a lubricating surface layer, so that high-pressure load bearing and friction coefficient reduction are facilitated; and the polycaprolactone flexible shell layer is compatible with the matrix, so that the filler is uniformly dispersed in the matrix.

The utility model relates to the technical field of production and processing of polycaprolactone microspheres, and discloses an emulsifying device which comprises a support, an emulsifying device body is fixedly mounted on the support, a first transmission pipe and a second transmission pipe are symmetrically arranged in the emulsifying device body, and a plurality of nozzles are mounted on the top surface in the emulsifying device body; the stirring structure is rotatably arranged in the emulsifying device body, the stirring structure comprises a rotating rod, a wall scraping rod, a filter cone, a stirring rod, a filter plate, a vortex plate and a vortex blade, the nozzle uniformly sprays a polycaprolactone solution into the emulsifying device body, and then rapid emulsification of the polycaprolactone solution and an emulsifying additive is accelerated by stirring and filtering of the filter plate and the filter cone. Therefore, the emulsification process is accelerated; the wall scraping rod scrapes off a polycaprolactone solution attached to the inner wall of the emulsifying device body, and centrifugal force eddy current formed by the vortex plates and the vortex blades accelerates emulsification, so that the polycaprolactone solution and an emulsifying additive are more sufficiently and uniformly emulsified.

The invention relates to the technical field of preparation of polycaprolactone porous membranes, in particular to a polycaprolactone porous membrane and a preparation method and application thereof.The polycaprolactone porous membrane is of a porous structure with macropores and small pores coexisting, the pore walls of the macropores and the small pores are all composed of polycaprolactone particles, and the polycaprolactone porous membrane is provided with pores with the pore walls composed of micron-sized particles. The polycaprolactone porous membrane is prepared from polycaprolactone, a composite hierarchical pore structure containing small pores in macropores is formed, a three-dimensional pore network internally communicated with one another is formed, the specific surface area is increased by the porous structure, the number of adhered cells is further increased, the interconnected porous structure allows cells to migrate into the polycaprolactone porous membrane, and meanwhile, the porous structure is convenient for conveying substances.

The invention discloses corrosion-resistant waterproof aluminum foil glass fabric and a preparation method thereof, and belongs to the technical field of aluminum foil composite glass fabric. The corrosion-resistant waterproof aluminum foil glass fabric sequentially comprises a waterproof glass fabric, a high-temperature-resistant adhesive layer and an aluminum foil from bottom to top, the waterproof glass fabric is obtained by padding a waterproof finishing agent; the waterproof finishing agent is mainly prepared from the following raw material components: a silane coupling agent, hydroxyl-terminated fluorine-containing dihydric alcohol, isophorone diisocyanate and polycaprolactone; the high-temperature-resistant adhesive is mainly prepared from the following raw material components: 4, 4 '-oxydiphthalic anhydride, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 3, 3'-diaminodiphenyl sulfone, 1, 3-bis (3-aminopropyl)-1, 1, 3, 3-tetramethyldisiloxane, 4-amino-2-hydroxybenzaldehyde and o-phenylenediamine, and the high-temperature-resistant adhesive is prepared from the following raw material components: 4, 4 '-oxydiphthalic anhydride, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 4, 4-(hexafluoroisopropyl) bis (p-phenoxy) diphenylamine, 3, 3'-diaminodiphenyl sulfone, 1, 3-bis (3-aminopropyl) The corrosion-resistant waterproof aluminum foil glass fiber cloth prepared by the invention is relatively good in high temperature resistance, corrosion resistance and waterproofness.

The invention discloses a degradable antibacterial anti-inflammatory polyurethane sponge and a preparation method thereof. The preparation method of the polyurethane sponge comprises the following steps: preparing caprolactone / lactide copolymer diol by taking epsilon-caprolactone, DL-lactide and 1, 4-butanediol as raw materials under the action of an organic zinc catalyst ZCAT-T50, and then preparing the polyurethane sponge by taking polyethylene glycol and the caprolactone / lactide copolymer diol as raw materials and 4, 4 '-dicyclohexylmethane diisocyanate as a cross-linking agent under the action of the organic zinc catalyst ZCAT-T50. And finally, sequentially adding an organic zinc catalyst ZCAT-T50, a chitosan oligosaccharide emulsion and a budesonide ethanol solution into the polyurethane prepolymer, and carrying out chain extension, foaming and curing, so as to prepare the budesonide-modified polyurethane composite material. The polyurethane sponge prepared by the invention has excellent mechanical properties, degradability and antibacterial and anti-inflammatory properties, is suitable for making medical hemostatic sponge, and has remarkable economic value and social benefit.

The invention discloses a gradient degradation type personalized absorbable sternum fracture fixing plate and a preparation process, and belongs to the technical field of medical implant materials. Comprising an anatomical adaptive plate body and an integrated locking assembly, the plate body is of a partitioned structure of a middle supporting area and an edge buffering area, a gradient pore array penetrating through the thickness direction is formed in the surface of the plate body, and a hydroxyapatite-collagen composite coating is loaded on the inner wall of a pore; the plate body is made of a composite absorbable material through 3D printing forming and hot pressing post-treatment, and the composite absorbable material comprises, by weight, 60%-70% of polylactic acid-glycolic acid copolymer (PLGA, LA / GA = 75 / 25), 15%-20% of silanized magnesium alloy microwires, 5%-10% of hydroxyapatite nano-particles and 5%-10% of polycaprolactone (PCL). Space-time matching of the degradation rate and the bone healing process is achieved through the partition gradient structure, the magnesium alloy microwires enhance the mechanical property and release active ions to promote osteogenesis, and the method has the advantages of personalized adaptation, gradient degradation, bone regeneration promotion and the like.

The invention discloses a process method for co-production of caprolactone and 2, 4-dimethyl benzoic acid. According to the method, cyclohexanone is taken as a raw material, oxygen is introduced as an oxidant, 2, 4-dimethyl benzaldehyde is added as a pro-oxidant, and caprolactone and 2, 4-dimethyl benzoic acid are generated through oxidation reaction. According to the technological method, oxygen and 2, 4-dimethyl benzaldehyde are used as a co-oxidation system, in the presence of the carbon framework material loaded Ti-based catalyst, cyclohexanone can be subjected to oxidation reaction under mild conditions to generate caprolactone, the reaction is safe and efficient, the selectivity of the product caprolactone and the co-product 2, 4-dimethyl benzoic acid is high, the raw material conversion rate is high, and the method is suitable for industrial production. The product yield can be obviously improved, and the economic applicability is good.

The invention discloses a composition for relieving, repairing and promoting skin regeneration as well as a preparation method and application of the composition. The composition is prepared from the following raw materials in parts by weight: 0.1 to 5 parts of mandelic acid, 0.5 to 10 parts of a cynanchum atratum extract, 1 to 8 parts of a xylitol compound, 0.5 to 15 parts of regenerated silicon, 1 to 10 parts of a starfish regeneration repair factor, 0.3 to 1.5 parts of trimethylolpropane tri (3-mercaptopropionic acid) ester, 0.05 to 0.5 part of calcium chloride, 0.1 to 1 part of an additive, 0.2 to 2 parts of chitosan-polycaprolactone, 0.2 to 1 part of a pH regulator and 5 to 15 parts of a solvent. 0.3 to 0.8 part of an antioxidant and 3 to 10 parts of a humectant; the additive is hyaluronic acid or formylated hyaluronic acid. Through a multi-channel synergistic effect, the effects of relieving, repairing and promoting skin regeneration are improved.

This invention discloses a denitrification biological carrier, its preparation method, and its application. The raw materials for preparing the denitrification biological carrier include an iron agent, modified activated carbon, polycaprolactone, sodium dodecyl sulfate, and a hydrogel binder. The modified activated carbon is 3-chloro-2-hydroxypropyltrimethylammonium chloride-modified activated carbon. The iron agent not only removes dissolved oxygen from water but also reduces total nitrogen in wastewater. The modified activated carbon improves its adsorption affinity for nitrogen-containing compounds. Polycaprolactone serves as a slow-release carbon source for denitrification, exhibiting high carbon source utilization. Sodium dodecyl sulfate, through its foaming properties, together with the modified activated carbon, iron agent, and polycaprolactone, forms a high-mechanical-strength, rough, and porous biological carrier structure, providing excellent attachment conditions for heterotrophic denitrifying bacteria. Therefore, applying the denitrification biological carrier of this invention to wastewater treatment systems can achieve good nitrogen removal efficiency and economic benefits.

This invention relates to a dual-mode polycaprolactone (PCL) building energy-saving film and its preparation method. The dual-mode PCL building energy-saving film of this invention uses a temperature-sensitive PCL and hydrogel composite layer as the outer layer, and adds VO2-based materials. It can automatically reflect near-infrared light during high summer temperatures and automatically project sunlight during low winter temperatures; it requires no external power supply and is purely passively regulated. Furthermore, a PCL-based triboelectric nanogenerator array serves as the middle layer, which can collect mechanical energy from the building surface environment to power low-power sensors within the building, and can also connect surplus energy to the grid or store it. The transparent PCL and nanocellulose composite layer provides better mechanical support and is easy to install.

The invention discloses a printing scratch-resistant composition as well as a preparation method and application thereof, and the printing scratch-resistant composition is prepared from the following components: polycaprolactone glycol modified polyester polyol resin, a compound solvent, organic treatment matting powder, an organic silicon hand feeling aid, polyurethane elastic powder, a compound drier and the like. According to the formula, caprolactone glycol modified polyester polyol resin is used as a basis, and is matched with a compound drier compounded by a modified polyurethane polymer and organic bismuth to replace a traditional harmful organic tin drier, so that the harm of a tin element to a human body and the environment is eliminated, and the drying efficiency and the construction life of a coating are effectively balanced; the construction life is prolonged to 4 h or above, the window period of the spraying process is remarkably prolonged, the problem that the construction life is short under a traditional high-viscosity system is solved, and the method is suitable for batch silk-screen production.

The invention discloses a biodegradable polyester composition with controllable degradation time and a preparation method of the biodegradable polyester composition, and relates to the technical field of biodegradable materials. 20-40 parts by weight of carboxyl-terminated polylactic acid; 0.5 to 3.0 parts by weight of a bifunctional chain extender containing an acetal bond; 5 to 15 parts by weight of a polyethylene glycol-b-polycaprolactone block copolymer; 1-5 parts by weight of modified cellulose nanocrystals; and 0.1-0.5 part by weight of metal organic framework loaded lipase. By reasonably matching the components and optimizing the preparation process, the degradation time of the biodegradable polyester composition can be accurately controlled, and the degradation induction period and the complete degradation time can be adjusted as required. The compatibility of the components is good, the mechanical property and the processing stability of the material can be effectively improved, and the problem of inactivation or uneven dispersion of the components in the processing process is avoided.

The invention relates to the field of ink printing and spraying, and provides salt-fog-resistant and damp-heat-resistant ink as well as a preparation method and application of the salt-fog-resistant and damp-heat-resistant ink. The salt-fog-resistant damp-heat-resistant ink comprises the following components in percentage by mass: 10%-30% of acrylate containing a caprolactone open-loop structure, 40%-80% of a reactive diluent, 0-10% of an acrylate oligomer A, 5%-15% of a photoinitiator, 0.5%-2% of an auxiliary agent and 0-5% of a pigment, the acrylate containing the caprolactone ring-opening structure comprises an acrylate oligomer B containing the caprolactone ring-opening structure or an acrylate monomer containing the caprolactone ring-opening structure. According to the UV LED curing ink-jet printing ink, the acrylate containing the caprolactone open-loop structure and the reactive diluent (and the optionally added acrylate oligomer A) are matched for use, so that the problems of poor salt mist resistance and wet heat resistance of an ink film existing in the UV LED curing ink-jet printing ink are effectively solved on the basis of ensuring that the ink has proper viscosity and surface tension.

The invention discloses a beta-ketimine type binuclear aluminum complex and a preparation method thereof. The binuclear aluminum complex can be used for catalyzing ring opening polymerization of caprolactone, lactide, glycolide, valerolactone, butyrolactone or ethylene carbonate. The invention further discloses a preparation method and application of the binuclear aluminum complex. The preparation method is simple, the reaction condition is mild, the prepared beta-ketimine type binuclear aluminum complex is used as a catalyst, the catalytic activity is high, the stability is good, the service life is long, the molecular weight distribution of the obtained polymerization product is narrow, and the beta-ketimine type binuclear aluminum complex can be well applied to the ring-opening polymerization reaction of cyclic ester.

The application discloses a preparation method of a self-emulsifying type wet spinning raw silk oil agent and a preparation method of high-uniformity carbon fibers, and belongs to the technical field of carbon fibers. In the application, polyglycerol and epsilon-caprolactone are catalytically prepared into PG-PCL; then the PG-PCL is reacted with acrylate to obtain acrylated PG-PCL; finally, the PG-PCL, the acrylated PG-PCL and perfluoropolyether acrylate are uniformly dissolved in acetone; then carboxylated cellulose nanocrystals and iron phthalocyanine are added and high-speed shearing emulsification is carried out, and water is gradually added to form a nanoemulsion; and the high-uniformity carbon fibers are obtained by combining a low-temperature preparation method of the carbon fibers. The method synchronously solves the problems of emulsion stability, fiber uniformity and carbonization compatibility, shortens a production cycle, is suitable for high-end fields such as aerospace and new energy vehicles, and has the advantages of high performance and green manufacturing.

This invention provides a PMMA-PCL-based composite solid electrolyte, its preparation method, and its applications. The composite solid electrolyte comprises the following components: polymethyl methacrylate, polycaprolactone, lithium salt, active lithium-containing filler, and an unsaturated alkynyl compound with photoinduced secondary self-enhancing properties. This invention promotes supramolecular homogeneous integration within the electrolyte through magnetic field-microwave coupling and, for the first time, introduces an unsaturated alkynyl compound with photoinduced secondary self-enhancing properties to anchor solvent molecules and anions, thereby regulating the local coordination environment of lithium ions at the interface to improve lithium-ion transport and interfacial stability of the PMMA-PCL-based composite solid electrolyte at room temperature. This results in the PMMA-PCL-based composite solid electrolyte provided by this invention exhibiting excellent room-temperature performance and significantly improving the performance of symmetric cells at 0.1 mA cm⁻¹. ‑1 The time it takes for the current density to allow for stable cycling.

The invention belongs to the field of biomedical materials, also belongs to the field of medical cosmetology, and particularly relates to a composite gel carrier material for loading an injection type soft tissue filler as well as preparation and application of the composite gel carrier material. The composite gel is prepared from carboxymethyl cellulose and carboxymethyl chitosan under the physical crosslinking action of citric acid, the carboxymethyl cellulose accounts for 2-4% of the total mass, the carboxymethyl chitosan accounts for 0-4% of the total mass and is not equal to 0, the citric acid accounts for 0.1-0.3% of the total mass, and the balance is water. Compared with a carboxymethyl cellulose gel carrier traditionally used in an injection type soft tissue filling material, the composite gel can support and uniformly load the polycaprolactone microspheres, on the premise that the needle passing performance is not affected, the mechanical supporting force of the gel is improved, the degradation speed is slowed down, the filling time of a polycaprolactone microsphere filling agent is prolonged, and the filling efficiency of the polycaprolactone microsphere filling agent is improved. And the high inflammatory reaction and the falling period of the filling effect caused by poor supporting force and rapid degradation of the carrier are effectively avoided.

The invention relates to the field of lubricating oil additives, in particular to a sulfur-phosphorus-free non-toxic ester polymer lubricating oil extreme pressure anti-wear additive, which is prepared from the following components in parts by mass: 18 to 22 parts of modified epsilon-caprolactone monomer, 3.5 to 4.5 parts of 5-carboxybenzotriazole, 0.3 to 0.4 part of catalyst 4-dimethylaminopyridine and the like. According to the invention, a stable organic-inorganic hybrid system is constructed by innovatively performing molecular modification and compounding on a functional ester polymer, a heterocyclic compound and a two-dimensional nano material. Compared with the prior art, the additive has the advantages that harmful elements such as sulfur and phosphorus are completely abandoned, synergistic improvement of multiple properties such as extreme pressure antiwear, friction reduction and corrosion resistance is realized, the service life of equipment is effectively prolonged, the environmental burden is reduced, and the additive has a wide application prospect in the fields of high-end equipment manufacturing, new energy automobiles and the like with strict requirements on lubricating materials.

The invention discloses a preparation method of a PLA / PCL-based bio-based enhanced degradable medical monofilament, which mainly comprises the following steps: grafting a sulfonic acid group in a PLA chain segment to modify a PLA material so as to promote degradation, and introducing aminated nano cellulose as a reinforcing filler. And carrying out melt blending on the PLA grafted with the sulfonic acid group, the PCL, the aminated nanocellulose and the bio-based compatibilizer to prepare the bio-based enhanced degradable medical monofilament. The polylactic acid (PLA) / polycaprolactone (PCL) composite fiber disclosed by the invention has the advantages of high mechanical property, rapid degradability and excellent biocompatibility.