Bamboo fiber/polylactic acid composite material and preparation method thereof

A composite material and bamboo fiber technology, applied in the field of bamboo fiber/polylactic acid composite material and its preparation, can solve the problems of bamboo fiber not easy to disperse, poor compatibility, black spots on the surface, etc., and achieve excellent surface appearance, phase The effect of improved capacitance and improved hydrophobicity

Inactive Publication Date: 2018-06-05
浙江明江新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still many problems in the composite process of polylactic acid and bamboo fiber, for example, bamboo fiber is not easy to disperse in polylactic acid resin, the compatibility of the two is not good, carbonization of bamboo fiber occurs during processing, etc.
As a result, the final product has rough appearance, silver threads, black spots on the surface, poor heat resistance, poor toughness, etc.

Method used

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  • Bamboo fiber/polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh respectively 600g of polylactic acid, 100g of talcum powder with a particle size of 2 microns, 30g of 20 mesh modified bamboo fiber, 20g of toughening agent, 1g of coupling agent, 1g of antioxidant, 2g of auxiliary antioxidant, 2g of lubricant, Nucleating agent 2g, anti-floating agent 1g and anti-hydrolysis agent 5g;

[0044] The preparation steps of modified bamboo fiber:

[0045] a. the bamboo fiber is alternately washed 2 times with sodium hydroxide solution and water, and dried after washing;

[0046] b. According to the mass ratio of 1:10, add the dried bamboo fiber into the polyethylene glycol solution with a mass fraction of 5% and add liquid paraffin wax with a mass of 5% of the bamboo fiber, heat up to 100°C, stir mechanically for 20 minutes, and add sixteen Alkyl sodium sulfate, the addition is 10% of the liquid paraffin mass, stirred at 800r / min to obtain a mixed solution;

[0047] c. Add 1% citric acid by mass of the mixed solution to the mixed solut...

Embodiment 2

[0060] Weigh respectively 700g of polylactic acid, 200g of talc powder with a particle size of 3 microns, 100g of modified bamboo fiber of 100 mesh, 100g of toughening agent, 2g of coupling agent, 2g of antioxidant, 4g of auxiliary antioxidant, 4g of lubricant, Nucleating agent 8g, anti-floating agent 2g and anti-hydrolysis agent 10g;

[0061] The preparation steps of modified bamboo fiber:

[0062] a. the bamboo fiber is alternately washed 2 times with sodium hydroxide solution and water, and dried after washing;

[0063] b. According to the mass ratio of 1:10, add the dried bamboo fiber into the polyethylene glycol solution with a mass fraction of 5% and add liquid paraffin wax with a mass fraction of 7% of the bamboo fiber, raise the temperature to 110°C, stir mechanically for 25 minutes, and add sixteen Alkyl sodium sulfate, the addition is 15% of the liquid paraffin quality, stirred at a speed of 900r / min to obtain a mixed solution;

[0064] c. Add 2% citric acid of the...

Embodiment 3

[0077] Weigh respectively 800g of polylactic acid, 300g of talc powder with a particle size of 4 microns, 150g of 200 mesh modified bamboo fiber, 150g of toughening agent, 3g of coupling agent, 3g of antioxidant, 6g of auxiliary antioxidant, 5g of lubricant, Nucleating agent 10g, anti-floating agent 3g and anti-hydrolysis agent 30g;

[0078] The preparation steps of modified bamboo fiber:

[0079] a. Bamboo fibers are washed 3 times alternately with sodium hydroxide solution and water, and dried after washing;

[0080] b. According to the mass ratio of 1:10, add the dried bamboo fiber into the polyethylene glycol solution with a mass fraction of 5% and add liquid paraffin wax with a mass fraction of 10% of the bamboo fiber, raise the temperature to 120°C, stir mechanically for 30 minutes, and add sixteen Alkyl sodium sulfate, the addition is 20% of the liquid paraffin quality, stirred at a speed of 1000r / min to obtain a mixed solution;

[0081] c. Add 3% citric acid of the m...

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Abstract

The invention discloses a bamboo fiber / polylactic acid composite material and a preparation method thereof. The bamboo fiber / polylactic acid composite material specifically comprises the following rawmaterials in parts by weight: 60-80 parts of polylactic acid, 10-30 parts of talcum powder, 3-15 parts of modified bamboo fibers, 2-15 parts of a flexibilizer, 0.1-0.3 part of a coupling agent, 0.1-0.3 part of an antioxidant, 0.2-0.6 part of an auxiliary antioxidant, 0.2-0.5 part of a lubricating agent, 0.2-1 part of a nucleating agent, 0.1-0.3 part of an anti-floating fiber agent and 0.5-3 partsof a hydrolysis resistance agent. According to the composite material disclosed by the invention, the bamboo fibers are modified and thermally treated, the bamboo fibers and talcum powder are treatedby using the coupling agent, and according to a certain mixing sequence and suitable extrusion process parameters, the problems that the bamboo fiber / polylactic acid composite material is rough in surface and has silver filaments and local black spots and the compatibility between the polylactic acid and the bamboo fibers is poor are solved.

Description

technical field [0001] The invention belongs to the field of polymer material modification, and in particular relates to a bamboo fiber / polylactic acid composite material and a preparation method thereof. Background technique [0002] At present, due to the white pollution caused by non-degradable plastics is becoming more and more serious, people are gradually trying to use some degradable plastics to replace some non-degradable plastics. Among them, polylactic acid is one of the main materials in the current degradable materials. , it is renewable and fully degradable, and completely harmless to the human body. It has broad application prospects in disposable tableware and food packaging. [0003] Bamboo fiber is widely used in compounding with polymers because of its low price. Among the many composite materials of bamboo fiber and polymers, polylactic acid can completely replace some petroleum raw materials to produce polymers in many properties, such as polyethylene (P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08L67/02C08K13/02C08K3/34B29C47/92B29C48/92
CPCC08L67/04B29C48/92B29C2948/9258B29C2948/92704C08K2201/003C08L2201/06C08L2201/08C08L2205/035C08L2205/16C08L2205/24C08L97/02C08L67/02C08K13/02C08K3/34
Inventor 金江彬王艳宁李文龙朱淑洁
Owner 浙江明江新材料科技股份有限公司
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