83 results about "Polyfuran" patented technology

The invention discloses a bio-based PEF fiber with a cool feeling and a quick-drying function as well as a preparation method and application thereof, and belongs to the field of textile functional materials. The bio-based PEF fiber with the cool feeling and the quick-drying function is prepared by spinning bio-based poly (ethylene 2, 5-furandicarboxylate) with an epoxy group and a sulfonic acid group; the bio-based PEF fiber has a profiled fiber cross section and / or a hollow structure. The bio-based poly (ethylene 2, 5-furandicarboxylate) with an epoxy group and a sulfonic acid group is adopted, the hydrophilicity is improved, and the PEF fiber with the special-shaped section and / or the hollow structure is constructed to achieve the cool feeling, so that the moisture absorption and quick drying effects of the fiber are improved. The heat dissipation effect of the fiber can be improved, the moisture absorption and quick-drying effect of the fiber can be improved, and therefore dual improvement of the cool feeling and the quick-drying function is achieved. When the PEF fiber with the cool feeling and the quick-drying function is prepared, the mechanical property, the biodegradability and the like can be considered.

The invention provides a synthesis method of bio-based poly (ethylene 2, 5-furandicarboxylate) (poly (ethylene 2, 5-furandicarboxylate) for short) and performance application of the bio-based poly (ethylene 2, 5-furandicarboxylate). According to the method, 2, 5-furandicarboxylic acid (FDCA) derived from renewable resources and ethylene glycol (EG) are used as main raw materials, and the high-molecular-weight PEF is prepared through microwave-assisted esterification-polycondensation reaction under the action of a metal catalyst. The prepared PEF has excellent thermal mechanical property and gas barrier property, the glass transition temperature is about 58.6 DEG C, the melting temperature is about 187.4 DEG C, and the thermal decomposition 18% weight loss temperature exceeds 400 DEG C. The PEF material can be biologically degraded under the industrial composting condition, and the degradation speed is higher compared with that of traditional petroleum-based PET polyester. The PEF provided by the invention is suitable for the fields of food packaging films, beverage bottles and fiber materials, has the advantages of biodegradability, heat resistance stability and high barrier property, can partially replace polyethylene glycol terephthalate (PET) and other petrochemical plastics, and meets the requirements of sustainable development.

The invention provides nickel-carbon conductive shielding foam. The nickel-carbon conductive shielding foam sequentially comprises a conductive layer, foam, a bonding layer and an isolating layer from top to bottom, the foam comprises 25 to 40 parts of nickel-carbon nanotube-cerium oxide composite powder, 1 to 5 parts of an ionic liquid dispersant, 10 to 25 parts of organic silicone oil, 20 to 40 parts of silicone rubber, 5 to 10 parts of polyfuran, 5 to 10 parts of maleimide, 0.5 to 3 parts of a silane coupling agent, 0.01 to 0.1 part of a platinum catalyst and 0.2 to 1.5 parts of a cross-linking agent. The conductive foam can effectively restrain high-frequency electromagnetic interference generated in modern electronic equipment and ensure normal work of the equipment. A self-repairing system is constructed by adding polyfuran and maleimide. When the foam generates cracks under the action of mechanical stress or thermal cycle in the using process, the self-repairing material can automatically repair a conductive network through a reverse Diels-Alder reaction, and the shielding performance and the conductivity of the material are recovered.

The present invention belongs to the technical field of the preparation of bio-based functional fibers, and relates to a preparation method of highly shrinkable polyethylene furandicarboxylate fibers. Preparation method: The polyethylene furandicarboxylate chips are dried and then melt-blended and spun to obtain highly shrinkable polyethylene furandicarboxylate fibers. The linear density of the fibers is 2.22 - 4.44 dtex, and the linear density deviation rate is -5% - 5%. The breaking strength of the fibers is 3.5 - 4.5 cN / dtex, the breaking elongation rate is 53.5 - 68.5%, the content of ultra-long fibers is 0 - 3 mg / 100 g, the content of defects is 3 - 20 mg / 100 g, the number of crimps is 12 - 15 per 25 mm, the crimp rate is 14% - 18%, and the boiling water shrinkage rate is 60 - 80%. The highly shrinkable polyethylene furandicarboxylate fibers prepared by the present invention are 100% highly shrinkable polyester fibers, and the fiber properties far exceed those of conventional highly shrinkable fibers, and can become an alternative product to PET.

The invention relates to a method for preparing high-molecular-weight polyethylene furandicarboxylate by a one-step method, and belongs to the technical field of bio-based polyester materials. The method comprises the following steps: weighing raw materials including 2, 5-furandicarboxylic acid, ethylene glycol, an end group regulator, a protective agent, a decarboxylation inhibitor and a catalyst, mixing and adding into a reaction container, introducing nitrogen, maintaining the pressure of the nitrogen in the reaction container to be 50-150 kPa, carrying out esterification reaction, heating and vacuumizing until the pressure is less than or equal to 50 Pa after the esterification reaction is completed, and carrying out polycondensation reaction to obtain the 2, 5-furandicarboxylic acid. And carrying out extrusion and drying so as to obtain the high-molecular-weight polyethylene furandicarboxylate, wherein the high-molecular-weight polyethylene furandicarboxylate is obtained. According to the method, the FDCA conversion rate is larger than or equal to 98%, the number-average molecular weight of the obtained product is larger than or equal to 32 kg / mol, no heavy metal residues exist, and the method is suitable for large-scale production of high-end bio-based packaging materials.

The invention particularly relates to a glass fiber reinforced composite plastic and a preparation method thereof, and the composite plastic comprises the following raw materials in parts by weight: 55-65 parts of PBT, 30-40 parts of PC, 25-35 parts of glass fiber, 2-4 parts of poly (2, 2, 6-trimethyl-1, 3-pentanediol monoisobutyrate), 1-3 parts of a compatilizer, 1- The material is prepared from the following components in parts by weight: 10-15 parts of ethylene glycol furandicarboxylate, 5-10 parts of a compatilizer, 4-10 parts of maleic anhydride grafted polyolefin elastomer, 3-8 parts of a silane coupling agent, 2-6 parts of an antioxidant, 1-5 parts of a lubricant and 5-12 parts of a synergistic aid. The PBT, the PC and the poly (ethylene 2, 5-furandicarboxylate) are compounded to serve as matrix plastic, the glass fibers are added for reinforcement, and the matrix plastic and the compatilizer, the maleic anhydride grafted polyolefin elastomer, the synergistic additive and other raw materials have a synergistic effect, so that the prepared glass fiber reinforced composite plastic has good mechanical properties, chemical resistance and wear resistance, and the service life of the plastic is prolonged. The preparation method is stable in process, convenient to control and high in production efficiency.

An environmentally friendly fresh-keeping can and a method of manufacturing the same are provided. The environmentally friendly fresh-keeping can includes a housing, an inner container, an easy-open lid, and a bottom cover. The housing, the inner container, the easy-open lid, and the bottom cover are respectively made of a spiral paper tube, bio-based polyethylene 2,5-furanoate (PEF), aluminum, and biodegradable plastic. The inner container is mounted into the housing through an inner opening on a top of the inner container. Then the easy-open lid and the bottom cover are respectively used to seal the inner opening of the inner container and a bottom opening of the housing. The respective components are made of biodegradable, recyclable and reusable materials and able to be disassembled for recycling and reuse. Thereby the can meets requirements for environmental protection and recycling.

The invention belongs to the technical field of blown film preparation, and relates to a bio-based poly (butylene furandicarboxylate) blown film and a preparation method thereof, and the blown film is prepared from poly (butylene furandicarboxylate) with specific molecular weight and functional master batch. The preparation method comprises the following steps: step A, preparing polybutylene furandicarboxylate; and step B, preparing the polyfurandicarboxylic acid butanediol blown film. The butanediol furandicarboxylate blown film not only shows excellent thermal stability and mechanical strength, but also has good antibacterial and barrier properties, so that the film is applicable to the fields of food, medicine packaging, agricultural films and the like. The invention aims to provide an environment-friendly high polymer material blown film completely derived from biomass, so as to reduce plastic pollution and provide a sustainable material choice.

The present invention discloses a furandicarboxylate bio-based crosslinkable elastomer and a preparation method thereof. The preparation method comprises: uniformly mixing furandicarboxylate or furandicarboxylate, a linear saturated dibasic acid or linear saturated dibasic acid ester, a linear unsaturated dibasic acid or linear unsaturated dibasic acid ester, and a diol; adding a catalyst and an antioxidant; heating the mixture to above 150°C; gradually heating the mixture under an inert atmosphere; and reacting the mixture at 150-190°C for 3-7 hours to obtain an intermediate product; stirring the intermediate product for a polycondensation reaction at a vacuum degree of 30-400 Pa and a temperature of 200-260°C for 3-8 hours to obtain a crude product; and dissolving, washing, and drying the crude product to obtain a finished product. The polyfurandicarboxylate bio-based elastomer prepared by the present invention has good mechanical properties and processing properties; and the composite material after crosslinking and filler reinforcement can greatly improve tensile strength, good resilience, low permanent deformation, and high tensile strength.

The invention relates to the field of textile fabrics, and discloses a polylactic acid fabric and a preparation method thereof. The polylactic acid fabric is prepared by weaving polylactic acid fibers, the polylactic acid fibers are prepared by melt spinning of a polylactic acid material body, and the polylactic acid material body is prepared from the following raw materials in parts by weight: 100-120 parts of polylactic acid resin, 12-20 parts of a heat-resistant moisture absorbent, 6-10 parts of a toughening agent and 0.2-0.4 part of an antioxidant; the heat-resistant moisture absorbent is prepared from lignin fibers, poly (ethylene 2, 5-furandicarboxylate), poly (butylene adipate-co-terephthalate) and a dispersing agent. The preparation method comprises the following steps of melt spinning, rib knitting, heat setting, dyeing and aftertreatment. The polylactic acid fabric prepared by the invention has better heat resistance, moisture absorption and shrink deformation resistance, and is suitable for scenes with higher requirements on heat resistance and moisture absorption, such as underwear or infant clothes.

The invention relates to polyfurandicarboxylic acid glycol ester resin as well as a preparation method and application thereof, and belongs to the technical field of organic high-molecular compounds. The preparation method of the polyethylene furandicarboxylate resin provided by the invention comprises the following steps: S1, mixing 2, 5-furandicarboxylic acid, ethylene glycol, a catalyst and an inhibitor, and carrying out esterification reaction to obtain an ester; and S2, carrying out low-pressure condensation polymerization on the ester obtained in the step S1 to obtain the polyethylene furandicarboxylate resin, the inhibitor is ethylene carbonate; according to the GB / T14571.2-2018 standard, based on the chromatographic purity of the ethylene glycol, the chromatographic peak area of the inhibitor in the mixture of the ethylene glycol and the inhibitor is 0.05%-0.6% of the sum of the chromatographic peak area of the inhibitor and the chromatographic peak area of the ethylene glycol. The preparation method can effectively reduce the content of acetaldehyde in the polyethylene furandicarboxylate resin.

The present invention provides a novel means for degrading PEF. Provided is a method for degrading polyethylene furanoate that includes causing an enzyme comprising a polypeptide which has an amino acid sequence having at least 90% identity with the amino acid sequence of SEQ ID NO: 1 and has one or more amino acid substitutions selected from the group consisting of H129W, F208S, A172C, and A209C to act on polyethylene furanoate.

The application discloses a colored poly(ethylene-2,5-furandicarboxylate) fiber, which comprises 2,5-furandicarboxylic acid, ethylene glycol, a catalyst, a crosslinking agent and a pigment, and the pigment is a bio-based dye or a colorant. The application further discloses a preparation method of the colored poly(ethylene-2,5-furandicarboxylate) fiber. Bio-based dyes treated by ultrasonic waves are used to efficiently dye poly(ethylene-2,5-furandicarboxylate) fibers obtained by polymerization and spinning of poly(2,5-furandicarboxylic acid) and ethylene glycol. In the dyeing process of the poly(ethylene-2,5-furandicarboxylate) fiber, dyeing carriers or dyeing auxiliaries are added, so that the affinity between the bio-based dyes and the fiber can be improved, the dyeing performance is further improved, and a pre-mordanting treatment is performed through metal ions, so that the dyes and the metal ions form a coordination, the energy level interval of an electron transition of a dye color system is changed, and then the color and the dyeing fastness of the dyes are effectively changed.

The invention discloses a bio-based low-carbon environment-friendly functional furan polyester fiber and a preparation method thereof. The invention belongs to the technical field of macromolecules, and particularly relates to a polyfurandicarboxylic acid cyclohexanedimethanol-ethylene glycol copolyester fiber. The invention also provides a preparation method of the bio-based furan copolyester, and the bio-based furan copolyester obtained according to the preparation method provided by the invention has higher crystallinity and crystallization rate, excellent fiber mechanical properties and remarkable antibacterial property, and is a sustainable environment-friendly fiber with good comprehensive properties. The bio-based furan copolyester fiber and the like can be widely applied to the related fields of conventional clothes, home textiles and the like.

The application relates to the field of protective films, and discloses a printed stretch film and a preparation method thereof. The printed stretch film is prepared from the following raw materials in parts by weight: 95-105 parts of polyethylene resin, 5-10 parts of nano-barium sulfate, 15-20 parts of tackifying masterbatch, 4-8 parts of stabilizer, 3-5 parts of lubricant and 2-4 parts of antioxidant; the tackifying masterbatch is composed of poly(ethylene-2,5-furandicarboxylate), dibutyl itaconate, polyhydroxyalkanoate and cyclohexane-1,2-dicarboxylic acid diglycidyl ester; the printed stretch film prepared by the application has good printability, scratch resistance, elongation at break and resistance to shrinkage and deformation, and has good applicability in protective films requiring printing ink; when the printed stretch film is used in packaging cartons, PET film and other packaging materials requiring color printing, the printed stretch film has good protective property and scratch resistance.

A method of producing an oligofuran moiety-containing polycarbosilane, the method including a polymerization step of reacting a dihydrosilyloligofuran compound with a diene compound and / or diyne compound in the presence of ahydrosilylation catalyst in which method the dihydrosilyloligofuran compound being a compound having a 2- to 256-mer of a furan ring and a hydrosilyl group at the α-position of each of both terminal furan rings of the 2- to 256-mer of the furan ring.

The invention relates to the technical field of biomass-based polyfuran polymer materials, in particular to a flexibility-adjustable biomass-based polyfuran polymer material and a preparation method thereof. A molecular structure of a conventional bio-based fat chain high-molecular polymer lacks a rigid structure, so that the heat resistance and the mechanical property are obviously lower than those of a petroleum-based high-molecular material. Aiming at the technical problems, the invention provides the flexibility-adjustable biomass-based polyfuran high-molecular material which is a product obtained by carrying out aldol condensation reaction on furan dicarboxaldehyde and diketone or polyketone under the action of a catalyst, and a molecular skeleton of the flexibility-adjustable biomass-based polyfuran high-molecular material consists of aromatic rings and carbon-carbon chains and does not contain heteroatoms; the biomass-based polyfuran polymer material is similar to a molecular skeleton of phenolic resin and has a lower carbon footprint, an aromatic furan ring in a molecular structure is connected with a double bond, and the flexibility of the biomass-based polyfuran polymer material can be adjusted by changing the type of diketone or polyketone.

The invention discloses a bio-based polyester / aramid fiber composite paper-based material and a preparation method thereof, relates to the technical field of paper-based materials, and solves the problems that an existing aramid paper-based material product is poor in appearance, mechanical property and insulating property. The aramid fiber composite material comprises the following components in parts by weight: 40-70 parts of aramid chopped fiber, 20-50 parts of aramid fibrid and 10-40 parts of poly (ethylene 2, 5-furandicarboxylate) (PEF) fiber. The length of the aramid chopped fibers is 5-7 mm, and the length of the PEF fibers is 3-6 mm. The composite paper-based material is quantified to be 25-250 g / m < 2 >, and the thickness is 0.04-0.25 mm. Uniformly mixing the aramid chopped fiber pulp, the PEF fiber pulp and the aramid fibrid pulp, and carrying out wet papermaking forming, squeezing and drying to obtain raw paper; and carrying out hot pressing treatment through multiple groups of temperature increasing type preheating rollers, hot pressing rollers and multiple groups of temperature decreasing type heat preservation rollers. The method can be used in the fields of aerospace, rail transit, new energy, national defense and military industry and the like.

Low-density, thermoplastic foams comprising: (a) thermoplastic polymer cells comprising cell walls comprising polyethylene furanoate, wherein at least about 50% by volume of the cells are closed cells

The invention provides a preparation method of low-color-value polyethylene furandicarboxylate. The germanium-titanium composite catalyst is used as the catalyst for preparing the polyethylene furandicarboxylate, so that the problems of slow reaction and dark color of the polyethylene furandicarboxylate are solved. According to the preparation method of the polyethylene furandicarboxylate, all the raw materials are only added before the reaction, additives or other catalysts do not need to be added in the middle process, the process is very simple, the process is environment-friendly, and industrialization is facilitated.

Disclosed is a method for oxidative pre-treatment of carbohydrate dehydration products, which involves the discovery that the functional groups of humins (such as functional groups that generate or lead to color formation (e.g. aldehyde groups and / or groups with conjugated double bonds)) can be more easily converted by oxidation (in some cases "bleached") compared to furanic compounds that form FDCA. This selective oxidation of humins can use milder oxidation conditions and / or different reaction systems compared to corresponding conditions and systems for oxidation of furan ring containing compounds. The oxidative pre-treatment can advantageously facilitate the selective oxidation of humin functional groups over furanic compounds that form FDCA, with the overall result that the humins are modified in a way that can provide a number of improvements. These can be particularly present in the further processing of the obtained pre-treated dehydration products, such as in the overall manufacture of bio-based poly(alkylene furandicarboxylate) copolymers, a notable example of which are poly(ethylene furandicarboxylate) or PEF.

The present invention provides a novel means for efficiently degrading PEF. Provided is a method for degrading polyethylene furanoate and polyethylene terephthalate that includes causing an enzyme comprising a polypeptide that has an amino acid sequence having at least 90% identity with the amino acid sequence of SEQ ID NO: 1 to act on polyethylene furanoate and polyethylene terephthalate in a buffer solution having a pH of 8.5 to 11.

This application discloses a method for synthesizing polyethylene (2,5-furandicarboxylate), comprising the following steps: mixing 2,5-furandicarboxylic acid and ethylene glycol in a molar ratio of 1:2, adding zinc acetate as an esterification catalyst, and carrying out an esterification reaction at 195°C and a pressure not exceeding 0.3 MPa until the water content reaches 98% of the theoretical amount; adding antimony trioxide as a polymerization catalyst and triphenyl phosphate as a stabilizer to the esterification product, and reacting for 1 hour at a low vacuum of 800-1000 Pa and a temperature of 215°C to carry out pre-condensation; and carrying out a condensation reaction of the pre-condensation product at a high vacuum of less than 200 Pa and a temperature of 235°C until the torque reaches 4.2 A / 65 rpm to obtain polyethylene (2,5-furandicarboxylate). By reducing the amount of antimony trioxide to 0.045% and triphenyl phosphate to 0.1%, the amount of stabilizer was reduced, releasing catalyst activity. This shortened the polymerization time from 300 min to 230 min, reduced the color value b from 12-13 to 10, and improved the intrinsic viscosity to 0.507~0.517 dL / g. This achieved a reduction in production costs and heavy metal residues while improving the product's color.

The present invention relates to a spun yarn comprising polyethylene 2,5-furandicarboxylate (PEF) filaments, which exhibits a breaking strength at least equal to 4 cN / dtex and a breaking energy at least equal to 40 cN / dtex, the breaking energy being defined as the product of the breaking strength (cN / dtex) and the breaking elongation (%), the breaking strength and breaking elongation being measured according to ASTM standard D885-03, and to a method for preparing the same.

The invention relates to the technical field of hot melt adhesives, and discloses a hot melt adhesive composition and a preparation method thereof. The hot melt adhesive composition is prepared from polyethylene furandicarboxylate-co-polylactic acid, a terpene-isoprene copolymer, a phosphite ester-hindered phenol compound antioxidant, triglycidyl isocyanurate, elastomer modified polycaprolactone, a hydroxyapatite nanorod, a lignin-graphene compound, dopamine modified nano cellulose, an antioxidant, a coupling agent, a coupling agent, a coupling agent and a lubricant. The nano-montmorillonite modified silicone oil is composed of a nano-zinc oxide-montmorillonite compound and polyether modified silicone oil, the peel strength is up to 9.2 N / mm, the elongation at break is 520%, the biodegradation rate is 93%, the ultraviolet aging resistance strength retention rate is 95%, and the cytotoxicity is level 1. The problems of insufficient mechanical property, poor environmental protection property and limited application scene are solved. The method can be widely adapted to the fields of electronic packaging, medical dressings, environment-friendly packaging and the like, and has technical advantages and environment-friendly value.

The invention belongs to the technical field of high polymer materials, and particularly relates to a modified polyethylene furandicarboxylate material as well as a preparation method and application thereof. The modified polyethylene furandicarboxylate material comprises a PEF main chain and fused ring end groups chemically grafted to the end part of the PEF main chain, and the fused ring end groups are stacked through pi-pi, so that a three-dimensional physical cross-linked network node is formed. According to the invention, through combination of a terminal functionalization strategy and a pi-pi stacking effect and a three-dimensional physical cross-linked network, synergistic enhancement of tensile strength and elongation at break of the polyester material is successfully realized, and excellent processability and oxygen barrier property are maintained at the same time. In a preferable scheme, the impact toughness of the material can be improved by 120-180% at most, meanwhile, the crystallization rate is improved by 3-5 times through a plasticizing effect, and the oxygen barrier property retention rate is 7 times or above that of PEF. The problems of narrow processing temperature window and poor melt strength of bio-based polyester PEF are effectively solved, and a new way is provided for developing high-performance sustainable packaging materials.

The invention relates to the technical field of stainless steel surface treatment, and discloses a chromium-free stainless steel passivator and a passivating treatment method.The passivator is prepared from, by mass, 5-10 parts of urea and inorganic ceramic graphene oxide mixture; 2-5 parts of a silane coupling agent; 3 to 7 parts of iron doped nano titanium dioxide Fe-TiO2; 2-6 parts of a mixture of molybdenum disulfide and titanium dioxide; 5 to 10 parts of poly (ethylene 2, 5-furandicarboxylate); 2 to 5 parts of thiosulfate; 3-8 parts of a water-soluble derivative of alginic acid; 1-3 parts of hydrogen peroxide; the passivating agent is prepared from the raw materials, the surface of a stainless steel workpiece is cleaned, electrophoresis passivating treatment is conducted, the passivated stainless steel workpiece is washed with deionized water and put into a drying box to be dried, and quality detection is conducted on the stainless steel workpiece subjected to post-treatment. And it is detected that the formed passive film has the advantages of ideal thickness, excellent corrosion resistance, high hardness and good adhesive force and chemical stability.

The invention belongs to the technical field of foaming materials, and relates to a super-hydrophobic ultralow-dielectric microporous PEF / PTEF foaming material as well as a preparation method and application thereof. The invention discloses a preparation method of a super-hydrophobic ultra-low dielectric microporous PEF / PTEF foam material, which comprises the following steps: (1) carrying out melt blending on 100 parts of PEF, 0.1-3 parts of PTEF and 0-0.1 part of an auxiliary agent at 180-240 DEG C to obtain a PEF / PTFE composite material; (2) carrying out hot press molding on the PEF / PTFE composite material in the step (1) to obtain a PEF / PTFE sheet; and (3) carrying out supercritical carbon dioxide foaming on the PEF / PTFE sheet in the step (2), saturating for 1-30 minutes, cooling to 70-95 DEG C, and rapidly decompressing and foaming within 1-5 seconds to obtain the super-hydrophobic ultra-low dielectric microporous PEF / PTEF foaming material. The super-hydrophobic and ultra-low dielectric microporous PEF / PTEF foaming material disclosed by the invention has relatively good super-hydrophobic performance and low dielectric performance.

The invention provides an application of an antibacterial agent in a poly (ethylene 2, 5-furandicarboxylate) material. The antibacterial agent adopted by the invention is hydrophobic organic salt with a double-bond, benzene ring or furan ring structure, and the antibacterial agent contains the double-bond, benzene ring or furan ring structure, so that the antibacterial agent has good compatibility with a material also containing a furan ring, and the antibacterial agent is not easy to dissolve out from a polyester main body; on the other hand, the water solubility of the organic salt is poor, and the stability of the organic salt can be kept without dissolving when the organic salt is boiled in high-temperature water, so that the antibacterial material can keep efficient and long-acting antibacterial performance when serving under high-temperature and humid conditions.