293 results about "Isosorbide" patented technology

The invention relates to the technical field of high-performance polyester, in particular to a high-strength low-shrinkage polyester fiber and a preparation method thereof. The defects that existing polyester fibers are poor in strength and shrinkage resistance are overcome. The preparation method comprises the following steps: mixing the modified resin, the modified nano silicon dioxide, the composite antioxidant, the composite nucleating agent and the composite lubricant, and carrying out melt spinning. Wherein the modified resin is prepared from the following raw materials: dimethyl terephthalate, isophthalic acid, ethylene glycol and isosorbide; the modified nano silicon dioxide comprises nano silicon dioxide, KH570 and silver nitrate; the composite antioxidant comprises an antioxidant 1010, an antioxidant 168 and an antioxidant 1222; the composite nucleating agent comprises sodium benzoate and nano montmorillonite; the composite lubricant is prepared from ethylene bis stearamide and pentaerythritol stearate. The prepared polyester fiber is high in strength, high in shrinkage resistance and suitable for manufacturing of outdoor equipment.

The invention discloses a bio-based isosorbide carbonate plasticizer and a preparation method and application thereof, and relates to the technical field of plastic processing assistants.The preparation method of the bio-based isosorbide carbonate plasticizer comprises the steps that in the atmosphere of protective gas, diester carbonate and isosorbide serve as raw materials to be subjected to transesterification with a catalyst; and after the reaction is completed, carrying out post-treatment to obtain the isosorbide carbonate plasticizer. The isosorbide carbonate plasticizer disclosed by the invention can effectively reduce the melting temperature and melt viscosity of a material, improve the processability of the material, increase the flexibility of the material and improve the optical transmittance of the material. The preparation method disclosed by the invention has the characteristics of being simple in process, green and environment-friendly, easily available in raw materials, easy in catalyst separation and relatively high in product yield, and is an efficient and environment-friendly preparation process of isosorbide carbonate.

The invention relates to the technical field of catalysts, and provides a supported sulfonated phenolic resin solid acid catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out hydrophobic modification on the surface of a carrier by adopting a silane coupling agent to obtain a modified carrier; then carrying out polymerization in-situ growth on soluble phenolic resin and a curing agent on the modified carrier to obtain a phenolic resin-loaded modified carrier; the preparation method of the supported sulfonated phenolic resin solid acid catalyst provided by the invention has the advantages that the process is simple, the cost is low, and the utilization rate of phenolic resin is high; the prepared catalyst is uniform in size, high in mechanical strength, not easy to crush, small in resistance and good in stability during liquid-phase flow catalytic continuous reaction, has good catalytic activity and high isosorbide yield when being used for catalyzing dehydration of sorbitol to prepare isosorbide, and can be recycled.

The invention relates to the technical field of self-healing agents, in particular to a well cementation cement slurry self-healing agent and a preparation method thereof. The modified polyethylene glycol terephthalate polymer comprises the following components in parts by weight: 30-50 parts of modified polyethylene glycol terephthalate polymer, 2-10 parts of metal oxide, 5-15 parts of lithium silicate, 0.5-2 parts of persulfate, 0.1-1 part of bacillus subtilis and 1-5 parts of calcium lactate. The isosorbide can react with ester bonds in polyethylene glycol terephthalate, so that more hydroxyl groups are introduced, and the hydroxyl groups can interact with cement hydration products or metal oxides and lithium silicate to promote formation of new mineral phases at cracks. The generation of the new mineral phase is beneficial to filling and repairing cracks, and the self-healing of the cement paste is realized, so that the long-term stability of a well cementation structure is improved. Tetraethyl orthosilicate can cooperate with other components such as the modified polyethylene glycol terephthalate polymer to jointly promote the self-healing process of set cement.

The invention discloses a preparation method of a polyurethane material with a shape memory function, biocompatibility and degradability, which comprises the following steps: (1) melting and mixing hydroxyl-terminated polyether or polyester polyol and isosorbide in a nitrogen atmosphere, and then adding diisocyanate for prepolymerization; (2) adding hexahydro-1, 3, 5-tris (hydroxyethyl)-s-triazine into the pre-polymerized solution, stirring, dissolving and reacting, and then pouring the mixed solution into a mold; and (3) placing the mold under the condition of 80 DEG C to volatilize the solvent, and curing to obtain the polyurethane film. The polyurethane film prepared by the invention has excellent mechanical properties. Meanwhile, the polyurethane film has good biocompatibility, a shape memory function and dual degradability. Compared with the traditional polyurethane material, the polyurethane material prepared by the method disclosed by the invention takes the biomass-based compound isosorbide as a raw material, integrates excellent comprehensive performance, functionality and degradability, and is a novel sustainable material with wide application.

The invention belongs to the field of fine chemical engineering, and particularly relates to a continuous production device and method of high-purity isosorbide. The device comprises a reaction unit, a separation unit and a purification unit which are sequentially connected, the reaction unit comprises a preheater and a reactor, the separation unit comprises a settling tank, a filter, a dehydrating tower and a distillation tower, and the purification unit comprises a decolorizing tower, a rectifying tower and a crystallizing tower. A sorbitol raw material enters a preheater to be preheated, the preheated material enters a reactor to be subjected to a dehydration reaction, the reacted material flows out of a discharging port in the upper portion of the reactor to enter a shell pass of a dehydration tower to be subjected to heat exchange and cooling, the cooled material enters a settling tank to settle solid waste, supernate enters a filter to be filtered, and a liquid phase flows into the dehydration tower to be subjected to water removal and concentration; and distilling out crude isosorbide in a distillation tower, and purifying the isosorbide crude product through a decolorizing tower, a rectifying tower and a crystallizing tower to obtain the high-purity isosorbide. The method has the outstanding characteristics of continuous production, separation and purification, and continuous production of high-purity isosorbide can be realized.

The invention relates to the technical field of high polymer materials, and discloses self-repairing bio-based polyester resin for a matte powder coating as well as a preparation method and application of the self-repairing bio-based polyester resin. The bio-based polyester resin is prepared from the following preparation raw materials in percentage by mole: 20 mol% to 40 mol% of bio-based flexible diol, 20 mol% to 35 mol% of bio-based furandicarboxylic acid, 10 mol% to 25 mol% of isosorbide, 5 mol% to 25 mol% of itaconic acid, 1 mol% to 15 mol% of long-chain bio-based aliphatic dibasic acid, 1 mol% to 10 mol% of bio-based citric acid, 0.1 mol% to 2.0 mol% of zinc acetylacetonate, 0.1 mol% to 1.0 mol% of a microcapsule corrosion inhibitor, 0.1 mol% to 1.0 mol% of an esterification catalyst and 0.1 mol% to 1.5 mol% of an antioxidant. The bio-based polyester resin does not contain petroleum-based monomers and is high in biochar content.

The invention discloses isosorbide type block copolycarbonate as well as a preparation method and application thereof, and belongs to the technical field of organic polymer materials. The problems that isosorbide polycarbonate in the prior art is low in molecular weight, deep in color and luster, fragile in material and the like are solved. The preparation method comprises the following steps: carrying out melt ester exchange polycondensation reaction on dihydric alcohol and isosorbide carbonate serving as raw materials to obtain dihydroxyl-terminated isosorbide ester glycol; rigid amorphous dihydroxyl-terminated isosorbide ester glycol and oligomeric flexible chain dihydric alcohol are connected together, and a molecular chain is reformed, arranged and branched to a certain extent, so that the isosorbide type block copolycarbonate is effectively synthesized. According to the method, the oligomeric flexible chain dihydric alcohol can be effectively introduced to improve the molecular weight and the mechanical property of the isosorbide polycarbonate, so that the problems that the isosorbide polycarbonate is too strong in structural rigidity, fragile in material, deep in color and the like in production and application are solved.

The invention provides a low-molecular soluble chelating collector as well as a preparation method and application thereof, and belongs to the technical field of mineral processing. According to the collecting agent, low-molecular-weight ethylene glycol terephthalate serves as a precursor, and isosorbide is introduced for a copolymerization reaction; glutamic acid is introduced as a branched chain unit, and the branching degree and reaction active site density of the molecular structure are remarkably improved by utilizing the polyfunctional group characteristic of glutamic acid. A rigid ring structure and an ether bond of the isosorbide endow the medicament with good water solubility and dispersity, and invalid curling of a macromolecular chain is avoided; the introduction of glutamic acid branched chains greatly increases the number of hydroxyl groups and amino groups capable of reacting with carbon disulfide, so that each molecule carries more xanthate groups, and the adsorption stability and coverage density of the molecule on the surface of arsenopyrite are enhanced. By means of the structure, xanthate functional groups are fully exposed, multi-tooth chelation is easily conducted on the xanthate functional groups and iron and arsenic ions on the surface of arsenopyrite, a strong hydrophobic surface layer is formed, and therefore the collecting selectivity is remarkably improved.

The invention discloses a catalyst for preparing isosorbide, a preparation method of the catalyst and a method for preparing isosorbide through reaction of sorbitol and dimethyl carbonate. The catalyst for preparing the isosorbide comprises macroporous ion exchange resin, and the macroporous ion exchange resin is provided with spherical or sphere-like pore channels and comprises a styrene type resin matrix and functional groups, the functional group is derived from a product obtained by carrying out chloromethylation on the styrene type resin matrix and then reacting the chloromethylated styrene type resin matrix with a heterocyclic compound containing more than two N atoms and a derivative of the heterocyclic compound. The catalyst can efficiently catalyze the reaction of sorbitol and dimethyl carbonate to prepare isosorbide, and has the characteristics of easy separation and high selectivity.

The invention relates to the technical field of cosmetics, in particular to an efficient anti-aging composition and a skin care product containing the composition. The invention discloses an efficient anti-aging composition which is prepared from the following raw materials in parts by mass: 12-15 parts of oil-based concentrated active ingredients, 25-35 parts of base collagen liquid, 15-18 parts of Ectoine, 12-16 parts of TWEEN 20 and 22-25 parts of isosorbide dimethyl ether, and the oil-based concentrated active ingredients are prepared from safflower seed oil, an extract of flowers / leaves / stems of herba lysimachiae, an extract of radix astragali membranaci, ubiquinone and vitamin E; the base collagen liquid comprises XVII type collagen, VII type collagen and IV type collagen. Aiming at the problems that an existing skin care product cannot effectively reduce skin wrinkles, improve skin compactness, reduce skin sagging and prevent skin aging for a long time, the composition disclosed by the invention realizes long-term aging resistance from epidermis to dermis, effectively reduces wrinkles, improves compactness and improves skin sagging.

The invention relates to the technical field of automobile coatings, and discloses an environment-friendly impact-resistant water-based automobile coating and a preparation method thereof.The environment-friendly impact-resistant water-based automobile coating is prepared by taking 4-carboxyphenylboronic acid, diethanol amine and isosorbide as raw materials to initiate polymerization with itaconic acid-based unsaturated polyester, acrylic acid and the like; dispersing with light calcium carbonate and auxiliaries to obtain the environment-friendly impact-resistant water-based automobile coating. The isosorbide is used as an ideal bio-based monomer, has a rigid spiral ring structure of a V-shaped bridge ring, and can better disperse and absorb energy when being impacted, reduce stress concentration during impact and improve the impact resistance of a coating film; a cyclic borate structure in the environment-friendly alkenyl borate monomer can form a layer of compact protective film on the metal surface, so that the metal is effectively prevented from reacting with substances such as acid and alkali in the external environment; the prepared water-based paint is low in VOC content, free of organic solvent residues and good in industrial application prospect.

The invention discloses an isosorbide-based heat-resistant yellowing-resistant biodegradable polyester and a preparation method thereof.The preparation method comprises the following steps that under the condition of an esterification catalyst, dibasic acid and dihydric alcohol are subjected to an esterification reaction, the dibasic acid is composed of terephthalic acid and 1, 1-cyclohexanedicarboxylic acid, and the dihydric alcohol is composed of 1, 1-cyclohexanedicarboxylic acid; the dihydric alcohol is composed of isosorbide and aliphatic dihydric alcohol; after the esterification reaction is finished, adding a polycondensation catalyst, a stabilizer and a toner into an esterification reaction product to carry out polycondensation reaction; after the polycondensation reaction is finished, the polycondensation product is subjected to bracing and grain-sized dicing, and the isosorbide-based heat-resistant and yellowing-resistant biodegradable polyester is obtained. 1, 1-cyclohexanedicarboxylic acid is introduced to replace part of terephthalic acid, aromatic ring structures on polyester chains are reduced, the yellowing resistance of polyester is improved, meanwhile, biomass-sourced isosorbide is added as a heat-resistant modified component, and the isosorbide-based heat-resistant and yellowing-resistant biodegradable polyester is obtained through a direct esterification method.

The invention discloses a colchicine external preparation with high intradermal residual quantity and percutaneous transmittance as well as a preparation method and application thereof, and belongs to the technical field of pharmaceutical preparations. The invention provides a colchicine external preparation with high intradermal residue and transdermal transmittance. The colchicine external preparation comprises: a) colchicine or a pharmaceutically acceptable salt thereof; b) a penetration enhancer; c) pharmaceutically acceptable excipients and / or excipients; the penetration enhancer is at least one of polyglycerol oleate or isosorbide dimethyl ether. The drug loading capacity and the percutaneous transmittance of the colchicine external preparation disclosed by the invention are remarkably improved. When polyglycerol oleate is selected as a penetration enhancer to prepare colchicine gel, the intradermal retention volume can reach 358.08 micrograms within 20 hours. When isosorbide monomethyl ether is selected as a penetration enhancer to prepare ethosome gel, the accumulated penetration amount can reach 106.87 mu g / cm < 2 >, and the intradermal residual amount can reach 90.58 mu g or above.

The invention relates to a composition with a permeation enhancing effect and application thereof. The composition is prepared from the following components in parts by weight: 10 to 15 parts of ethoxydiethylene glycol, 10 to 15 parts of isosorbide dimethyl ether, 5 to 10 parts of folium artemisiae argyi extract and 1 to 6 parts of tea tree essential oil. According to the permeation enhancing composition, traditional azone easy to sensitize and ethyl alcohol easy to cause stimulation are abandoned, the efficient, safe and lasting permeation effect is finally achieved, and the permeation enhancing composition meets the high-activity component delivery requirement of cosmetics.

The invention provides a bio-based spraying-free material and a preparation method thereof. The bio-based spraying-free material is prepared from the following raw materials in parts by weight: 30 to 65 parts of bio-based isosorbide polycarbonate, 15 to 25 parts of ASA (Acrylonitrile Styrene Acrylate) high rubber powder, 15 to 40 parts of acrylonitrile-styrene polymer, 0 to 10 parts of compatilizer, 0.1 to 0.5 part of antioxidant, 0.1 to 0.5 part of lubricant and 0.2 to 0.5 part of weather-resistant agent. The adopted bio-based isosorbide polycarbonate is non-toxic and has a rigid ester ring structure, the ASA high rubber powder and the acrylonitrile-styrene polymer provide flexibility and impact resistance, and through a rigid-flexible molecular chain structure, the impact resistance is good while the strength and hardness are maintained; besides, through the synergistic effect of all the components, while the bio-based source and environmental friendliness are maintained, the composition also has excellent heat resistance, aging resistance and weather resistance, and can meet the requirements of automobile exterior decorations.

The invention discloses a preparation method of a high-toughness transparent plastic cup, and belongs to the technical field of plastic preparation, and the preparation method comprises the following steps: 1, preparing a modified elastomer toughening agent from 16.4-21.9% of an isosorbide-based plasticizer, 2.2-2.6% of polydimethylsiloxane, 1.5-2.2% of citric acid and the balance of polycaprolactone; 2, preparing a cinnamyl aldehyde bamboo pulp antibacterial reinforcing agent from 4.8 to 8.2 percent of cinnamyl aldehyde, 22 to 36 percent of bamboo pulp, 7.5 to 10.6 percent of bio-based 1, 3-propylene glycol (PO3G) and the balance of water; 3, weighing the cinnamyl aldehyde bamboo pulp antibacterial reinforcing agent, the modified elastomer toughening agent and polylactic acid to prepare high-toughness polylactic acid; and 4, preparing the high-toughness transparent plastic cup from the high-toughness polylactic acid. The high-toughness transparent plastic cup is prepared by compounding the modified elastomer flexibilizer, the cinnamyl aldehyde bamboo pulp antibacterial enhancer and the polylactic acid, and has the advantages of high strength, excellent toughness, good staphylococcus aureus inhibition effect, biodegradability and the like.

The application discloses a kind of nano zinc oxide enhanced UV curing luminous ink and preparation method thereof, belong to ink technical field, the nano zinc oxide enhanced UV curing luminous ink, including the following raw materials: nano zinc oxide 15-21 parts;2-hydroxybenzophenone 3.6-7.8 parts;Isosorbide dimethyl ether 78-95 parts;Epoxy acrylate resin 18-27 parts;Polyester acrylate resin 32-38 parts;Acrylate 47-65 parts;Luminous powder 17-23 parts;Defoaming agent 0.6-1.2 parts;Dispersing agent 0.8-2.1 parts;Leveling agent 1.4-1.8 parts;Photoinitiator 0.6-0.9 parts.The application is short in total preparation time, and production efficiency is greatly improved;In addition, the application speeds up the curing speed, and the water resistance is also significantly improved;The dispersion rate of luminous powder is improved by the way of nano zinc oxide coated with luminous powder, so that the prepared nano zinc oxide enhanced UV curing luminous ink presents more uniform fluorescent effect.

The invention provides isosorbide-based copolyester as well as a preparation method and application thereof, and relates to the technical field of high polymer materials. According to the preparation method, a step-by-step esterification method is adopted, firstly, isosorbide, excessive aromatic dicarboxylic acid and an acylating agent are subjected to a first esterification reaction, so that the acylating agent can efficiently and specifically activate secondary hydroxyl of isosorbide, and the initial esterification rate of isosorbide is greatly increased. Meanwhile, the excessive aromatic dicarboxylic acid ensures that the generated isosorbide prepolymer takes carboxyl as a terminal group, so that isosorbide molecules are'locked 'in the middle of a polymer chain segment. Due to the fact that the isosorbide is embedded in the middle of the chain segment in advance, the problem that the isosorbide falls off in the ester exchange reaction due to the fact that the isosorbide is located at the chain end and low in reaction activity in the subsequent polycondensation stage is effectively solved, and therefore the retention rate of the isosorbide in the final polymer is greatly increased, and the glass-transition temperature of the isosorbide is greatly increased.

The invention relates to a method for preparing bio-based isosorbide dimethyl ether through resin catalysis, and belongs to the technical field of organic synthesis. Adding corn starch into a sulfuric acid solution, hydrolyzing into glucose, and filtering to obtain a glucose solution; adding a solid acid catalyst into the concentrated glucose solution, and filtering after reaction; carrying out reduced pressure distillation on the filtrate to obtain an isosorbide crude product, and purifying through recrystallization; the preparation method comprises the following steps: adding isosorbide, a methylation reagent and a basic catalyst into a reaction kettle, stirring for reaction, cooling and filtering; and distilling the filtrate, and collecting fractions to obtain high-purity isosorbide dimethyl ether. The solid acid catalyst is sorbic acid based styryl macroporous cation exchange resin; the styryl macroporous cation exchange resin is soaked in sulfuric acid to be activated and then is mixed with sorbic acid chloride, 2-thiophenecarbonyl chloride and zinc chloride to react, and then washing and drying are performed to prepare the solid acid catalyst; the isosorbide dimethyl ether prepared by the method disclosed by the invention is high in purity and relatively high in yield.

The invention provides a high-heat-resistance copper-clad plate and a preparation process thereof, and belongs to the technical field of copper-clad plates. The preparation process comprises the following steps: pretreating the polyimide film; preparing a mixed glue solution; preparing a prepreg; and hot-pressing and curing. The preparation method comprises the following steps: carrying out a reaction on m-diacetylene benzene, methyl phenyl dichlorosilane and the like used as raw materials to prepare a silicon-containing resin, and carrying out a reaction on isosorbide bis (terephthalate), bisphenol A and dibenzoate used as raw materials under the catalysis of 4-dimethylaminopyridine to prepare a modifier. When the modifier is used for modifying the silicon-containing resin to prepare the modified silicon-containing resin, as the modifier can improve the thermal conductivity of the silicon-containing resin, facilitate uniform distribution of heat and further improve the heat resistance of the silicon-containing resin, after the modified silicon-containing resin is added into a modified glue solution, the heat resistance of the modified glue solution can be effectively improved, and the service life of the modified glue solution is prolonged. Therefore, the effect of improving the heat resistance of the copper-clad plate is achieved.

The invention relates to an anti-UV isosorbide polycarbonate copolymer and a preparation method thereof, and belongs to the technical field of high-molecular polycarbonate. The technical problem to be solved by the invention is to provide the anti-UV isosorbide polycarbonate copolymer. Polymeric monomers of the copolymer comprise isosorbide, a hydroxyl-containing triazine compound and diester carbonate, and the molar ratio of the isosorbide to the hydroxyl-containing triazine compound to the diester carbonate is (0.9-0.5): (0.1-0.5): 1. According to the invention, isosorbide and a hydroxyl-containing triazine compound are taken as polyhydric alcohols and are copolymerized with diester carbonate, so that the efficient anti-UV bio-based polycarbonate is obtained, and the properties such as UV resistance, thermal stability and aging resistance of the polycarbonate are obviously improved. According to the preparation method of the anti-UV isosorbide polycarbonate, the reaction raw materials are wide in source, the reaction process is green and environment-friendly, and the preparation method is worthy of being widely popularized and applied.

The invention discloses bio-based polycarbonate and a preparation method thereof, and belongs to the technical field of high polymer materials. The method comprises the following steps: dissolving isosorbide in an organic solvent, adding a catalyst, continuously introducing carbon dioxide, carrying out condensation polymerization at specific temperature and pressure, and after the reaction is finished, precipitating, washing and drying to obtain a finished product. By optimizing reaction conditions, the biomass source proportion of the material is increased, the hardness and mechanical properties of the material are remarkably improved, and a feasible technical scheme is provided for replacing traditional bisphenol A polycarbonate.

The invention discloses a polyester material with excellent thermal stability and optical transmittance, the structural formula of the polyester material is # imgabs0 #, and n: m = (0: 100)-(100: 0). The preparation method of the polyester material comprises the following steps: heating terephthalic acid, an alcoholic solution, a catalyst and an additive to 50-100 DEG C in a nitrogen environment, and pulping to be uniform; raising the temperature to 150-220 DEG C, and carrying out esterification reaction until the esterification rate reaches 95% or above; vacuumizing to 100 Pa or below, heating to 230-260 DEG C, and carrying out condensation polymerization for 2-3 hours; and adding isosorbide, heating to 260-270 DEG C, reacting for 20-60 minutes, discharging, crushing and drying to obtain the target product. The polyester material prepared in the invention has good thermal stability and optical transmittance.

The invention relates to the technical field of catalysts, and provides a supported sulfonated polystyrene-divinylbenzene catalyst as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: carrying out hydrophobic modification on the surface of a carrier by adopting a silane coupling agent, then growing polystyrene-divinylbenzene on the modified carrier in situ, and carrying out sulfonation treatment to prepare the supported sulfonated polystyrene-divinylbenzene catalyst. The preparation method of the supported sulfonated polystyrene-divinylbenzene catalyst provided by the invention is simple, the utilization efficiency of resin can be improved, and the cost of the catalyst is reduced; the prepared catalyst is uniform in size, good in strength, not easy to crush, small in resistance and good in stability during liquid-phase flow catalytic continuous reaction, has good catalytic activity and high isosorbide yield when being used for catalyzing dehydration of sorbitol to prepare isosorbide, and can be recycled for multiple times.

The invention discloses a bio-based polycarbonate copolymer and a preparation method thereof, and belongs to the technical field of new materials. The bio-based polycarbonate copolymer is prepared from isosorbide and isomeride thereof, crystallizable oligomer diol, amide diol, carbonic acid diester and a catalyst through a transesterification process and a polycondensation process. The problems that the plasticity and toughness of bio-based polycarbonate are poor, and the strength, toughness and heat resistance cannot be balanced are successfully solved, and finally, the high-strength, high-toughness and high-heat-resistance bio-based polycarbonate polymer is successfully prepared through copolymerization of isosorbide, amide diol and crystallizable oligomer diol.

The invention discloses a polyurethane material with a shape memory function and dual degradability as well as a preparation method and application thereof, and belongs to the field of functional polyurethane materials. The preparation method of the polyurethane material comprises the following steps: melting and mixing isosorbide and polycaprolactone glycol in a nitrogen atmosphere, then adding a diisocyanate monomer to react for 9-12 hours, finally adding a chain extender hexahydro-1, 3, 5-tris (hydroxyethyl)-s-triazine, stirring for 30 minutes, pouring a reaction mixed solution into a polytetrafluoroethylene mold, and curing at 80 DEG C to obtain a polyurethane film. According to the invention, the ratio of an isosorbide rigid structure unit to a hexahydrotriazine cross-linked structure unit is finely regulated and controlled, so that the dual-degradability polyurethane with both chemical degradability and biodegradability is obtained. The polyurethane prepared by the invention also has good mechanical properties and biocompatibility and shows a good shape memory function, and the shape fixation rate (Rf) and the shape recovery rate (Rr) are both greater than 90%.

The invention discloses a PBAT copolymerization modified material preparation method, which comprises: weighing terephthalic acid, adipic acid, furandicarboxylic acid and lactic acid according to a certain ratio, putting into a reaction container a, and uniformly stirring; the preparation method comprises the following steps: weighing 1, 4-butanediol and isosorbide, adding the 1, 4-butanediol and the isosorbide into a reaction container a, and continuously stirring; adding catalysts of zinc acetate, tetrabutyl titanate and triphenyl phosphate; vacuumizing the reaction container a, filling nitrogen or argon, and replacing inert gas for three times; heating the reaction container a, and adding a catalyst antimony trioxide; vacuumizing is started; continuously raising the temperature to 210 to 240 DEG C, and continuously reacting for 2 to 10 hours; and introducing inert gas, stopping heating, and cooling to obtain the modified PBAT material. The novel degradable material is obtained from the aspects of improving the material performance and reducing the cost, and the obtained material has the characteristics of high tensile strength and good toughness.

This invention discloses a method for preparing bio-based polycarbonate, belonging to the field of polymer materials technology. This method introduces a highly efficient catalyst (nano-cerium oxide) into the polyisosorbate preparation system through specific steps, precise control of reactant ratios, pre-activation treatment, and the use of antioxidants, achieving the preparation of high-bio-based, high-hardness, and high-performance polyisosorbate. This method not only simplifies the traditional polycarbonate material preparation process and reduces production costs, but also improves the environmental friendliness and sustainability of the product, solving many problems faced by traditional polycarbonate materials in the current market.

The present disclosure relates to a polyester film and a preparation method of the same. Since the polyester film includes a resin layer formed from a mixture comprising a polyester resin, which includes a first diol moiety derived from isosorbide and a second diol moiety derived from cyclohexanedimethanol in a controlled ratio, and polyethylene terephthalate in a specific ratio, it is possible to exhibit improved heat resistance and adhesion with excellent light transmittance.