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Polylactic acid-based biomass composite material and preparation method thereof

A composite material, polylactic acid-based technology, applied in the field of environmentally friendly polylactic acid-based biomass composite materials and its preparation, can solve problems such as poor mechanical properties, low thermal stability, and high price

Active Publication Date: 2022-03-18
TANGSHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of poor mechanical properties, low thermal stability, high price, and slow degradation of existing PLA and PHBH, the present invention provides an environmentally friendly, inexpensive PLA / PHBH / PLA with good mechanical properties and biodegradability. KGM Biomass Composites

Method used

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  • Polylactic acid-based biomass composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 300g of PHBH, 3g of maleic anhydride and 2g of stannous octoate were premixed in a high-speed mixer for 10 minutes and then added to a twin-screw extrusion granulator for extrusion and granulation to obtain modified PHBH. The temperature of each section from the feed area to the die of the twin-screw extruder is 150°C, 155°C, 160°C, 160°C, 160°C, 158°C, 155°C, the main engine speed is 85rpm, and the feeding speed is 8.2rpm.

[0021] Premix 300g konjac glucomannan and 90g epoxidized soybean oil under the action of an electric mixer for 2 hours, add the premixed material to a twin-screw extrusion granulator to melt and plasticize and extrude to obtain thermoplastic konjac glucomannan sugar. The temperature of each section from the feed area to the die of the twin-screw extruder is 135°C, 140°C, 145°C, 145°C, 145°C, 145°C, 142°C, the speed of the main engine is 85rpm, and the speed of feeding is 8.2rpm.

[0022] Weigh 2000g PLA, 250g modified PHBH, 180g thermoplastic konj...

Embodiment 2

[0024] 400g of PHBH, 10g of maleic anhydride and 3g of stannous octoate were premixed in a high-speed mixer for 10 minutes and then added to a twin-screw extrusion granulator for extrusion and granulation to obtain modified PHBH. The temperature of each section from the feed area to the die of the twin-screw extruder is 152°C, 155°C, 158°C, 162°C, 162°C, 165°C, 162°C, the speed of the main engine is 95rpm, and the speed of feeding is 9.3rpm.

[0025] Premix 400g konjac glucomannan and 150g epoxidized soybean oil under the action of an electric mixer for 3 hours, add the premixed material to a twin-screw extrusion granulator to melt and plasticize and extrude to obtain thermoplastic konjac glucomannan sugar. The temperature of each section from the feed area to the die of the twin-screw extruder is 135°C, 138°C, 140°C, 140°C, 142°C, 142°C, 140°C, the speed of the main engine is 95rpm, and the speed of feeding is 9.3rpm.

[0026] Weigh 2500g PLA, 500g modified PHBH, 300g thermo...

Embodiment 3

[0028] 250g of PHBH, 7g of maleic anhydride and 0.6g of stannous octoate were premixed in a high-speed mixer for 10 minutes and then added to a twin-screw extrusion granulator for extrusion and granulation to obtain modified PHBH. The temperature of each section from the feed area to the die of the twin-screw extruder is 155°C, 155°C, 158°C, 160°C, 162°C, 160°C, 158°C, the speed of the main engine is 110rpm, and the speed of feeding is 10.5rpm.

[0029] 280g konjac glucomannan and 130g epoxidized soybean oil were premixed for 2.5h under the action of an electric mixer, and the premixed material was added to a twin-screw extrusion granulator for melt plasticization and extrusion to obtain thermoplastic konjac glucomannan polysaccharides. The temperature of each section from the feed area to the die of the twin-screw extruder is 140°C, 142°C, 145°C, 145°C, 145°C, 145°C, 143°C, the speed of the main engine is 98rpm, and the speed of feeding is 9.5rpm.

[0030]Weigh 1800g PLA, 35...

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Abstract

The invention relates to the technical field of environment-friendly high polymer materials, in particular to an environment-friendly polylactic acid-based biomass composite material and a preparation method thereof. The PLA / PHBH composite material comprises the following components in parts by weight: 100 parts of PLA, 10-30 parts of modified PHBH, 5-20 parts of thermoplastic konjac glucomannan, 1 part of 1, 3: 2, 4-bis (p-methylbenzylidene) sorbitol, 1-15 parts of a plasticizer and 0.1-0.5 part of a lubricant. PLA, the modified PHBH, thermoplastic konjac glucomannan, 1, 3: 2, 4-bis (p-methylbenzylidene) sorbitol, a plasticizer and a lubricant are stirred in a high-speed mixer for 8-15 min and then put into a hopper of a twin-screw extrusion granulator, and extrusion and granulation are performed after melt blending. Compared with the prior art, the modified PHBH has high thermal stability and good flexibility, and the brittleness of PLA can be improved. And the regenerated KGM is introduced, so that the processing cost of the composite material is reduced, and the biodegradability of the composite material is improved.

Description

technical field [0001] The invention relates to the technical field of environment-friendly polymer materials, in particular to an environment-friendly polylactic acid-based biomass composite material and a preparation method thereof. Background technique [0002] PLA (full name: polylactic acid) is a bio-based polymer obtained by fermenting lactic acid from corn starch and then polymerizing it. It is non-toxic, non-irritating, good biocompatibility and biodegradability. Under the action of microorganisms, it can be completely degraded into water and carbon dioxide, and will not cause any harm to the environment. The application of PLA can reduce the pollution of petroleum-based polymer materials to the environment and reduce the dependence on non-renewable resources. However, PLA is a linear aliphatic polyester, which has the disadvantages of brittleness, poor impact resistance, slow degradation and high cost, which greatly limits its application. [0003] PHBH (full name...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L5/00C08L91/00C08K5/053
CPCC08L67/04C08L2201/06C08L2205/24C08L5/00C08L91/00C08K5/053
Inventor 张青高永光杨笑春刘会媛
Owner TANGSHAN NORMAL UNIV