41 results about "Polyfuran" patented technology

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.

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 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 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.

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 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.

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 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 a far-infrared heating fiber based on bio-based polyester and a preparation method of the far-infrared heating fiber, and relates to the technical field of fibers. According to the preparation method, azido polycaprolactone is prepared, azido groups and the side wall of a far-infrared material carbon nanotube are subjected to a cyclization addition reaction, the polycaprolactone is modified on the surface of the carbon nanotube, the dispersity of the carbon nanotube in a matrix is improved, and then terminal hydroxyl groups of the polycaprolactone and hydrophilic chain segment polyethylene glycol are used for participating in bio-based poly (2, 2, 6-trimethyl-1, 3-pentanediol). The preparation method comprises the following steps: carrying out polycondensation reaction on a carbon nanotube and 2, 5-furandicarboxylic acid copolyester to finally prepare a carbon nanotube / copolyester composite material with good hydrophilic performance and excellent antistatic performance, introducing the composite material into polyester chips for melt spinning, and improving the moisture absorption and antistatic performance of polyester fibers by utilizing the synergistic effect between hydrophilic chain segments in the copolyester and carbon nanotubes. Meanwhile, the fiber is endowed with a far infrared heating function.

The application discloses a one-step method for preparing high-molecular-weight polyethylene furandicarboxylate, and belongs to the technical field of bio-based polyester materials.The method comprises the following steps: weighing raw materials, i.e., 2,5-furandicarboxylic acid, ethylene glycol, an end-group regulator, a protective agent, a decarboxylation inhibitor and a catalyst, mixing and adding the raw materials into a reaction container, introducing nitrogen, maintaining the nitrogen pressure in the reaction container at 50-150 kPa, performing esterification, increasing the temperature after the esterification is completed, and performing vacuumization to less than or equal to 50 Pa to perform polycondensation, obtaining a high-molecular-weight polyethylene furandicarboxylate melt, extruding, drying and obtaining the high-molecular-weight polyethylene furandicarboxylate.The conversion rate of FDCA is greater than or equal to 98%, the number-average molecular weight of the obtained product is greater than or equal to 32 kg / mol, there is no heavy metal residue, and the method is suitable for large-scale production of high-end bio-based packaging materials.

The invention relates to the technical field of high polymer materials, in particular to a full-bio-based polyether ester block copolymer as well as a preparation method and application thereof. The full bio-based polyether ester block copolymer is a poly (2, 5-furandicarboxylic acid propylene glycol ester)-b-poly (trimethylene ether glycol) block copolymer, and is prepared from bio-based 2, 5-furandicarboxylic acid, bio-based 1, 3-propylene glycol and bio-based poly (trimethylene ether glycol) as raw materials. The FDCA, PDO and PO3G raw materials adopted by the invention are all derived from biomass, the full-bio-based polyether ester elastomer is successfully prepared, and the requirements of green chemistry and sustainable development are met. Besides, by introducing a flexible PO3G chain segment into a PTF molecular chain, the brittleness problem of a pure PTF material is effectively overcome, the copolymer shows typical elastomer behavior, the highest elongation at break can reach 264.31%, good combination of rigidity and toughness is realized, and the application prospect is wide.

This invention relates to the field of bio-based injection molding technology, specifically to a bio-based injection molding compound and its production process, comprising the following raw materials in parts by weight: 80-95 parts matrix resin, 4-6 parts modified reinforcing components, 2-3 parts bio-based crosslinking components, and 2.5 parts bio-based functional additives. The matrix resin is based on polylactic acid (PLA), compounded with polybutylene furanate and polyhydroxyalkanoates to form a ternary bio-based polyester system. This system compensates for the brittleness of PLA at the matrix level, improving elongation at break. The addition of modified reinforcing components enhances the material's rigidity and heat resistance through nanoscale reinforcement. Furthermore, the ionic liquid modification improves the compatibility with the matrix interface, preventing the mechanical properties from decreasing due to reinforcing phase agglomeration. Nanocellulose replaces traditional glass fiber reinforcement, avoiding wear on the screw and mold, and extending equipment lifespan.

Barrier layer (101) against migration of a substance, wherein the barrier layer (101) is arranged in a cable (121, 123) and / or around an electrical conductor (105, 107, 109, 111), and the barrier layer (101) comprises or consists of polyethylene furanoate, characterized in that the barrier layer (101) is manufactured by extrusion together with a sheath layer (103) in one operation, such that the barrier layer (101) is permanently bonded to the sheath layer (103).

The object of the present invention is to provide a polyester that can be manufactured from biomass-derived raw materials and has excellent heat resistance, gas barrier properties, and blow moldability, a polyester composition containing the same, and a bottle using the same that has excellent heat resistance, gas barrier properties, and impact resistance. [Solution] A polyethylene furanoate having an intrinsic viscosity of 0.95 dl / g or more and 1.50 dl / g or less. However, the intrinsic viscosity is measured at 30°C using an Ubbelohde viscometer after dissolving 0.25 g of the polyethylene furanoate in 50 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 50 / 50 (weight ratio) (Huggins constant is assumed to be 0.32).

A method for preparing a polyethylene furanoate fiber, comprising: drying polyethylene furanoate chips and then performing melt-blending spinning, wherein after the drying, the moisture content of the polyethylene furanoate chips is less than or equal to 200 ppm, the crystallinity is 30% to 50%, and the softening temperature is 120-140°C; the melt-blending spinning comprises a screw extruder melt extrusion process, a spinning process, an annular cross-flow cooling process, a two-stage drawing process, and a tension heat setting process; process parameters of the melt-blending spinning comprise: a screw rotation speed of 28-35 r / min, a spinning beam temperature of 265-280°C, an annular cross-flow air supply-return pressure difference of 600-800 Pa, a first-stage drawing temperature of 70-80°C, a second-stage drawing temperature of 100-120°C, a total drawing ratio of 2.94-3.52, and a tension heat setting temperature of 140-160°C. The polyethylene furanoate fiber has excellent mechanical properties.

The present application relates to the technical field of bio-based polyester synthesis, and particularly to a preparation method of poly(ethylene 2,5-furandicarboxylate). The method comprises the following steps: purification of 2,5-furandicarboxylic acid: sequentially using activated carbon, de-aldehyde resin and modified adsorbent to purify 2,5-furandicarboxylic acid, which can effectively reduce the content of acylfuranic acid, furfuryl acid and aldehyde impurities, reduce the occurrence of side reactions and reduce the colority of the finished product. In a reaction container, the purified 2,5-furandicarboxylic acid, ethylene glycol, a composite catalyst and a composite stabilizer are added, and after esterification and polycondensation, poly(ethylene 2,5-furandicarboxylate) is prepared; using a mixture of aluminum acetylacetonate, triphenyl antimony diacetate and zinc acetate as the catalyst of poly(ethylene 2,5-furandicarboxylate) can effectively improve the color of PEF.

A mechanical part (2, 3) including a functional surface intended to come into frictional contact with another functional surface, wherein the functional surface of the mechanical part (2, 3) is made of polyethylene furanoate.

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

This polyethylene furanoate has an intrinsic viscosity of 0.95-1.50 dl / g. Said intrinsic viscosity is measured (the Huggins constant is defined as 0.32) at 30°C by using a Ubbelohde viscometer, after dissolving 0.25 g of the polyethylene furanoate in 50 ml of a solvent mixture of phenol / 1,1,2,2-tetrachloroethane=50 / 50 (weight ratio).

The invention relates to the technical field of bio-based materials, and particularly discloses a bio-based three-dimensional crimped elastic fiber and a preparation method thereof. The fiber is of an integrated structure formed by parallel composite spinning of a polylactic acid component and a polyethylene furandicarboxylate component according to a specific mass ratio, and comprises a parallel hollow section and a permanent three-dimensional spiral curled form; the preparation method comprises the following steps: drying the raw materials, carrying out melt extrusion on the dried raw materials, carrying out composite spinning, carrying out cooling molding, and finally carrying out stretching setting to obtain the fiber. According to the fiber disclosed by the invention, the intrinsic shrinkage difference of two bio-based materials is utilized, and spontaneous high-elastic recovery is realized while the advantages of the whole bio-based material are maintained through structural design and process collaboration; the preparation method effectively solves the technical bottlenecks of poor elastic recovery and the like of the traditional bio-based fiber by accurately controlling the thermal history and the stress field, thereby being suitable for the fields of high-end textile and medical auxiliary materials.

Provided is a multilayered hollow container comprising: a poly(ethylene terephthalate) layer including poly(ethylene terephthalate); and a poly(ethylene furanoate) layer including poly(ethylene furanoate). When the height of the multilayered hollow container is expressed by H, the lower end of the poly(ethylene furanoate) layer is positioned in the range of 0.05H-0.15H in terms of distance from the grounding portion of the multilayered hollow container and the upper end of the poly(ethylene furanoate) layer is positioned in the range of 0.90H-1.00H in terms of distance from the grounding portion of the multilayered hollow container.

Disclosed herein is a process comprising: a) contacting a mixture comprising a dialkyl furandicarboxylate, 1, 3-propanediol, and a metal catalyst at a temperature in the range of from 160 DEG C to 220 DEG C to form a prepolymer wherein the molar ratio of the dialkyl furandicarboxylate to the 1, 3-propanediol is in the range of from 1: 1.3 to 1: 2.2, and the concentration of the metal catalyst is in the range of from 20 ppm to 400 ppm based on the total weight of the mixture; b) removing at least a portion of the unreacted 1, 3-propanediol; and c) heating the prepolymer under reduced pressure to a temperature in the range from 230 DEG C to 260 DEG C to form a poly (trimethylene furandicarboxylate) polymer while removing 1, 3-propanediol. The poly (trimethylene furandicarboxylate) polymer is disclosed.

A waterproof membrane based on biomass modified asphalt and a biomass polyester base is provided. A method for preparing the waterproof membrane using the prepared raw materials includes following steps: a, heating the modified biomass asphalt, adding the heavy calcium filler into the modified biomass asphalt, and stirring uniformly to obtain a composition, then pumping the composition into a modified biomass asphalt tank; b, immersing the bio-based polyethylene furanoate (PEF) base into the modified biomass asphalt tank for saturation; c, scraping off excess asphalt from the bio-based PEF base saturated with the modified biomass asphalt; d, after removing the excess modified biomass asphalt from the surface of the bio-based PEF base, cooling treatment is conducted; and e, after cooling, applying a silicon oil-coated polyethylene (PE) isolation layer on a surface to obtain a finished waterproof membrane.

A polyethylene furanoate having an intrinsic viscosity of 0.95 dl / g or more and 1.50 dl / g or less. Herein, the intrinsic viscosity is measured by dissolving 0.25 g of the polyethylene furanoate in 50 ml of a mixed solvent of phenol / 1,1,2,2-tetrachloroethane = 50 / 50 (weight ratio) using an Ubbelohde viscometer at 30°C (Huggins constant is set to 0.32).