Degradable fiber containing PHBV (polyhydroxybutyrate-hydroxyvalerate) and preparation method of degradable fiber

A technology for degrading fibers and molar content, applied in the direction of melt spinning, conjugated synthetic polymer rayon, etc., can solve the problems of unfavorable mechanical strength of fibers, unfavorable long-term continuous production, clogging of spinning components, etc. The effect of strength, meeting the requirements of use and improving production efficiency

Active Publication Date: 2011-08-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But CO 2 The polymer is an amorphous polymer, which is not conducive to the improvement of the mechanical strength of the fiber; the melting point of PCL is about 60 o C, and PHBV melting point (150 ~ 160 o C) The difference is large, at the PHBV spinning temperature (170-175 o C) The degradation of PCL is also not conducive to the preparation of higher st

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take polyhydroxybutyrate-valerate (PHBV) with a weight average molecular weight of 300,000 and a molar content of hydroxyvalerate of 3%, and polylactic acid with a weight average molecular weight of 120,000 and a molar content of L optical isomer of 98%. Carry out vacuum drying with the 3-hydroxybutyric acid / 4-hydroxybutyric acid copolymer [P(3HB-co-4HB)] that weight-average molecular weight is 390,000, 4-hydroxybutyric acid molar content is 12%, drying temperature is 60 ±5 o C, the drying time is 16 hours, and the vacuum is 100Pa; 45 kilograms of PHBV after drying, 49.5 kilograms of polylactic acid after drying and 5.5 kilograms of P(3HB-co-4HB) after drying are physically mixed in a high-speed mixer; The mixture is injected into a single-screw extruder to melt, extruded into fibers through metering pumps and spinneret holes, and collected to obtain degradable continuous long fibers. The spinning temperature is 204 o C. The spinning speed is 1500m / min; at 56 o C draf...

Embodiment 2

[0039] Take polyhydroxybutyrate-valerate (PHBV) with a weight average molecular weight of 510,000 and a molar content of hydroxyvalerate of 23%, and polylactic acid with a weight average molecular weight of 180,000 and a molar content of L optical isomer of 70%. and polybutylene succinate (PBS) with a weight average molecular weight of 130,000 for vacuum drying at a drying temperature of 60±5 o C, the drying time is 16 hours, and the vacuum is 100Pa; 9 kilograms of dried PHBV, 9.1 kilograms of dried polylactic acid and 81.9 kilograms of dried PBS are physically mixed in a high-speed mixer; the mixture is injected into a twin-screw extruder It is melted in the machine, extruded into fibers through metering pumps and spinneret holes, and collected to obtain degradable continuous long fibers. The spinning temperature is 172 o C. The spinning speed is 500m / min; at 55 o C draft 2.5 times, and then at 60 o The thermal setting was carried out at C, and the measured tensile strength...

Embodiment 3

[0041] Take polyhydroxybutyrate-valerate (PHBV) with a weight average molecular weight of 300,000 and a molar content of hydroxyvalerate of 3%, and polylactic acid with a weight average molecular weight of 60,000 and a molar content of L optical isomer of 42%. Vacuum dry with polybutylene terephthalate (PBAT) with a weight average molecular weight of 50,000, and the drying temperature is 60±5 o C, the drying time is 16 hours, and the vacuum degree is 100Pa; take 5 kg of dried PHBV, 47.5 kg of dried polylactic acid and 47.5 kg of dried PBAT for physical mixing in a high-speed mixer; inject the mixture into a single-screw extruder It is melted in the machine, extruded into fibers through metering pumps and spinneret holes, and collected to obtain degradable continuous long fibers. The spinning temperature is 188 o C. The spinning speed is 1000m / min; at 54 o C draft 2.4 times, and then at 60 o The heat setting was carried out at C, and the measured tensile strength of the long ...

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Abstract

The invention relates to a degradable fiber containing poly (hydroxybutyrate-hydroxyvalerate) (PHBV) and a preparation method of the degradable fiber. At present, the preparation technology of the PHBV fiber has various defects. The degradable fiber is a mixture of PHBV and polylactic acid-containing binary mixture, and 100 mass parts of degradable fiber contains 1 to 89 parts of PHBV and 11 to 99 parts of polylactic acid-containing binary mixture. The polylactic acid-containing binary mixture is a binary mixture of polylactic acid and P (3HB-co-4HB) or poly (butylene succinate) (PBS ) or polybutylene terephthalate (PBAT). The preparation method comprises the following steps of: performing vacuum drying on the PHBV and the polylactic acid-containing binary mixture respectively, then performing physical mixing in a ratio, performing melt spinning, and finally performing post treatment. The degradable fiber has good spinning property at low spinning temperature and high spinning temperature, and has high mechanical strength and sustained stable soft handfeel; and the preparation method can effectively improve the production efficiency and reduce the cost.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a degradable fiber containing PHBV and a preparation method thereof. Background technique [0002] Chemical fiber has become an indispensable and huge amount of chemical products in people's daily life, industrial and agricultural production. The waste of traditional chemical fibers is usually not easy to degrade, which brings a burden to the ecological environment. In order to solve the above problems, there is an urgent need to develop and utilize degradable fibers. [0003] In the family of degradable polymers, polyhydroxybutyrate-valerate (PHBV) has attracted more and more attention due to its good biodegradability, biocompatibility and mechanical properties. PHBV can decompose into carbon dioxide, water and biomass under soil or compost conditions. Using PHBV as a raw material to prepare degradable fibers is conducive to providing a chemical fiber variety that mee...

Claims

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Application Information

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IPC IPC(8): D01F8/14D01D5/08
Inventor 陈鹏顾群黎俊周坚王宗宝苟曲廷严庆
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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