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Bio-based 2, 5-furandicarboxylic acid copolyester fiber as well as preparation method and application thereof

A technology of furandicarboxylic acid-based copolyester and furandicarboxylic acid, which is applied in the field of fibers, can solve the problems of low dyeing rate and lack of normal pressure dyeing, and achieve extended application range, excellent normal pressure dyeability, high The effect of dye uptake

Active Publication Date: 2021-05-07
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Importantly, there is no report on 2,5-furandicarboxylic acid-based polyester fibers with higher tensile strength and elongation at break than PET fibers with the same molecular weight and molecular weight distribution
[0005]On the other hand, due to the lack of hydrophilic groups, high stereoregular chain structure and high crystallinity of PET fiber, the dyeing rate of PET fiber is low in normal pressure dyeing , can only be dyed under high temperature and high pressure conditions
Copolymerization is one of the main means to improve the dyeing performance of PET fibers, but the existing technology usually sacrifices the mechanical properties of PET fibers to improve the dyeing rate
For example, PTA, EG, neopentyl glycol and bishydroxyethyl isophthalate-5-sodium sulfonate are copolymerized to obtain copolyester and spun into fibers (The Journal of the Textile Institute, 2017, 11, 1949-1956 ), when the content of neopentyl glycol in the copolyester was 9mol%, the dye uptake rate of the copolyester fiber was 95.91%, which was 79.3% higher than that of PET fiber, but the tensile strength was only 2.03cN / dtex, compared with 36.7% reduction in PET fibers

Method used

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  • Bio-based 2, 5-furandicarboxylic acid copolyester fiber as well as preparation method and application thereof
  • Bio-based 2, 5-furandicarboxylic acid copolyester fiber as well as preparation method and application thereof
  • Bio-based 2, 5-furandicarboxylic acid copolyester fiber as well as preparation method and application thereof

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preparation example Construction

[0037] Another aspect of the embodiments of the present invention also provides the preparation method of the aforementioned bio-based 2,5-furandicarboxylate copolyester fiber, which includes:

[0038] Under a protective atmosphere, make containing 2,5-furandicarboxylic acid, terephthalic acid, ethylene glycol, C 12 -C 20 A mixed reaction system of glycol ether composition, esterification catalyst, polycondensation catalyst, stabilizer and antioxidant is reacted to prepare 2,5-furandicarboxylic acid-based copolyester;

[0039] Drying the obtained 2,5-furandicarboxylate copolyester so that at least the moisture content of the 2,5-furandicarboxylate copolyester is below 70ppm;

[0040] And, spinning the dried 2,5-furandicarboxylic acid-based copolyester to obtain 2,5-furandicarboxylic acid-based copolyester as-spun fibers, and then heat-drawing to obtain 2,5-furandicarboxylate copolyester fiber.

[0041] In some more specific embodiments, the preparation method includes: maki...

Embodiment 1

[0084] First, 2,5-furandicarboxylic acid (FDCA), terephthalic acid (PTA), ethylene glycol (EG), hexaethylene glycol and nonaethylene glycol composition (the molar ratio of the two is 1:1), anhydrous acetic acid Add zinc into the reactor according to the molar ratio of 0.01:0.99:1.6:0.0003:0.002, and gradually raise the temperature to 185°C under the protection of vacuum atmosphere and nitrogen for 3 hours; then add 0.12% of the total molar weight of FDCA and PTA into the reactor. Antimony trioxide, 0.20% triphenyl phosphate, 0.15% antioxidant-176, slowly evacuated to 0.03MPa, and pre-polymerized at 198°C for 1h; finally, gradually raised the temperature to 260°C, and continued to evacuate to React below 200Pa for 4h to obtain 2,5-furandicarboxylic acid-based copolyester. After testing, the intrinsic viscosity of copolyester is 0.70dL / g; Weight average molecular weight (M w ) and molecular weight distribution (DI) are 23700g / mol, 1.63 respectively; entanglement molecular weigh...

Embodiment 2

[0088] First, 2,5-furandicarboxylic acid (FDCA), terephthalic acid (PTA), ethylene glycol (EG), decaethylene glycol, and anhydrous zinc acetate are added to the reaction according to the molar ratio of 0.10:0.90:1.6:0.003:0.002 In the still, under the protection of vacuum atmosphere and nitrogen, the temperature was gradually raised to 185° C. and the reaction was stirred for 3 h; then 0.12% tetrabutyl titanate, 0.20% triphenyl phosphate, 0.15% antioxidant-1010, slowly evacuated to 0.03MPa, prepolymerized at 190°C for 1 hour; finally, gradually raised the temperature to 260°C, and continued to evacuate below 200Pa for 4 hours to obtain 2,5-furandicarboxylic acid Copolyester. After testing, the intrinsic viscosity of copolyester is 0.75dL / g; Weight average molecular weight (M w ) and molecular weight distribution (DI) are 27910g / mol, 1.55 respectively; entanglement molecular weight (M e ) is 1180 g / mol.

[0089] Continuously blow the copolyester with hot air at 130°C for 10 ...

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Abstract

The invention discloses a bio-based 2, 5-furandicarboxylic acid-based copolyester fiber as well as a preparation method and application thereof. The 2, 5-furandicarboxylic acid-based copolyester fiber is mainly prepared by polymerizing 2, 5-furandicarboxylic acid, terephthalic acid, ethylene glycol and a C12-C20 glycol ether composition to form 2, 5-furandicarboxylic acid-based copolyester, and then carrying out melt spinning and hot drawing treatment to prepare the bio-based 2, 5-furandicarboxylic acid-based copolyester fiber. Compared with the existing PET fiber with the same molecular weight and molecular weight distribution, the 2, 5-furandicarboxylic acid-based copolyester fiber prepared by the invention has higher tensile strength and elongation at break, breaks through the performance bottleneck of low tensile strength of the conventional copolyester fiber, and expands the application range of the furanyl copolyester fiber; and under the condition that a disperse dye is used for dyeing, the dye-uptake is higher, the normal-pressure dyeability of the disperse dye is excellent, the problem that the fiber quality is damaged by high-temperature dyeing is solved, and the energy consumption during dyeing is remarkably reduced.

Description

technical field [0001] The invention belongs to the field of fiber technology, and relates to a bio-based 2,5-furandicarboxylate copolyester fiber and a preparation method and application thereof. Background technique [0002] In the past few decades, synthetic fibers have been widely used in various fields such as textiles, biomedicine and agriculture. Polyester such as polyethylene terephthalate (PET) is one of the commonly used polymers in these fields, but it is petroleum based. With the global emphasis on environmental protection and sustainable development in recent years, the research and development of bio-based or partially bio-based polyesters is in the ascendant. Representative varieties include polylactic acid (PLA), polyhydroxyalkanoate (PHA), polysuccinic acid Butanediol ester (PBS), etc. However, the above-mentioned bio-based polyesters are all aliphatic, lack rigid rings in the chain structure, and have insufficient performance in terms of strength, heat re...

Claims

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Application Information

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IPC IPC(8): D01F6/84C08G63/58
CPCD01F6/84C08G63/58
Inventor 陈鹏王鹏
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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