Method for preparing celluloses and modified biodegradable polymer blend fibers

A technology of blending fibers and polymers, applied in the direction of cellulose/protein conjugated rayon, fiber chemical characteristics, rayon manufacturing, etc., can solve problems such as difficult to dissolve and melt, limit blending spinning, etc., and achieve improved combination force, improve meltability and spinnability, and improve mechanical properties

Inactive Publication Date: 2013-09-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cellulose contains a large number of hydroxyl groups and other polar groups, which are easy to form intramolecular and intermolecular hydrogen bonds, and are difficult to dissolve and melt, which limits the blending and spinning of cellulose and other polymers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Vacuum-dry degradable polymer PEG (Dow, PEG-200) at 60°C and vacuum degree of 100Pa for 24 hours, 300g of degradable polymer PEG after vacuum drying, 30g of active small molecule MA (Sinopharm Group, 10013128) and 0.5g initiator DCP (Sinopharm Group, 800486712) are blended and then extruded by a co-rotating twin-screw extruder. The temperature of each section of the screw is 100°C, 110°C, 120°C, 130°C , 140°C and 140°C, the screw speed is 300rpm, the screw aspect ratio of the twin-screw extruder is 1:45, and the unreacted MA is extracted and removed with acetone to obtain PEG-g-MA.

[0023] (2) Cotton cellulose with a degree of polymerization of 500 (Jiangsu Longma, M500) and PEG-g-MA were vacuum-dried for 24 hours at 60°C and a vacuum of 115Pa, and 400g of cotton cellulose after vacuum drying, After 200g vacuum-dried PEG-g-MA, 1000g [BMIM] C1 (Shanghai Chengjie, LM1039) was blended evenly, it was extruded by a co-rotating twin-screw extruder, defoamed, and filtered...

Embodiment 2

[0025] (1) The degradable polymer PLA (NatureWorks, USA, 4032D) was vacuum-dried for 12 hours at 70°C and the vacuum degree was 110Pa, and 400g of the degradable polymer PLA after vacuum drying, 40g of the active small molecule AA (Sinopharm Group, 80001428) and 0.4g initiator BPO (Sinopharm Group, 80016028) were blended and then extruded with a co-rotating twin-screw extruder. and 120°C, the screw speed is 200rpm, the screw length-to-diameter ratio of the twin-screw extruder is 1:50, and unreacted AA is extracted and removed with ethanol to obtain PLA-g-AA.

[0026] (2) Cotton cellulose with a degree of polymerization of 500 (Jiangsu Longma, M500) and PLA-g-AA were vacuum-dried for 12 hours at 70° C. and a vacuum of 100 Pa, and 400 g of cotton cellulose after vacuum drying, 300g vacuum-dried PLA-g-AA, 1000g [BMIM]Cl (Shanghai Chengjie, LM1039) were blended evenly, extruded by co-rotating twin-screw extruder, defoamed, filtered, and then sprayed by the spinning assembly. Silk...

Embodiment 3

[0028] (1) The degradable polymer PLA (NatureWorks, USA, 4032D) was vacuum-dried for 12 hours at 70°C and the vacuum degree was 110Pa, and 400g of the degradable polymer PLA after vacuum drying, 40g of the active small molecule GMA (Sinopharm Group, 39254470) and 0.4g initiator DCP (Sinopharm Group, 800486712) were blended and then extruded with a twin-screw extruder. °C, the screw speed is 200 rpm, the screw aspect ratio of the twin-screw extruder is 1:50, unreacted GMA is extracted and removed with acetone to obtain PLA-g-GMA.

[0029](2) Cotton cellulose (Jiangsu Longma, M500) and PLA-g-GMA with a degree of polymerization of 500 were vacuum-dried for 12 hours at 70° C. and a vacuum degree of 105 Pa, and 400 g of cotton cellulose after vacuum drying, After 300g vacuum-dried PEG-g-GMA, 1200g [EMIM]Ac (Shanghai Chengjie, LM1132) was blended uniformly and then extruded by a twin-screw extruder, defoamed and filtered, the spinneret of the spinning assembly Spinning, the screw a...

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Abstract

The invention provides a method for preparing celluloses and modified biodegradable polymer blend fibers. The method is characterized by comprising the concrete steps: step one, vacuum-drying biodegradable polymers, and blending 80-90 weight percent of the vacuum-dried biodegradable polymers, 9.8-19.9 weight percent of active small molecules and 0.1-0.2 weight percent of initiating agent and then adopting a double-screw extruder to extrude to obtain graft-modified biodegradable polymers; step two, vacuum-drying celluloses and the graft-modified biodegradable polymers obtained in the step one, blending 20-30 weight percent of the vacuum-dried celluloses, 40-60 weight percent of ionic liquid and 20-30 weight percent of the vacuum-dried graft-modified biodegradable polymers and then adopting the double-screw extruder to extrude, and spinning out through a spinneret plate of a spinning pack; and washing off the ionic liquid of the obtained fibers through a water tank, then stretching and winding through the spinning pack, and finally obtaining the celluloses and the modified biodegradable polymer blend fibers. According to the method, the materials have good processing properties and biological properties.

Description

technical field [0001] The invention belongs to the field of novel green processing and modification of polymer materials, and relates to high-temperature blending melt spinning of cellulose and degradable polymers. Background technique [0002] Cellulose is a common natural polymer material. The research and development of this most abundant renewable resource in nature, especially the research on its modification, has aroused people's widespread attention this year. Currently commonly used cellulose modification methods include: derivatization modification, graft copolymerization modification, and blending modification. Among them, the effect of graft copolymerization modification is better, but graft copolymerization modification does not affect the process conditions. The requirements are very strict. The graft modification of existing cellulose and cellulose derivatives mostly stays in the laboratory stage, and it is still very difficult to further realize the expansion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/02D01F8/16D01F8/14D01F1/10C08F283/06C08F283/02
Inventor 余木火张玥李欣达李海峰钟璇黎欢韩克清
Owner DONGHUA UNIV
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