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Plant fiber-reinforced polylactic acid foam material and preparation method thereof

A polylactic acid foaming and plant fiber technology, which is applied in the field of plant fiber reinforced polylactic acid foaming material and its preparation, can solve the problem that the interface compatibility between polylactic acid and fiber is not well solved, and the plant fiber reinforced polylactic acid foaming material can not be well solved. Difficult to prepare foam materials, poor compatibility between natural fibers and polylactic acid, etc., to achieve superior performance, reduce apparent density, and enhance mechanical properties and mechanical properties.

Inactive Publication Date: 2011-01-26
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents are inherently unique, but they do not solve the problem of interfacial compatibility between polylactic acid and fibers
[0006] At present, there is no patent disclosure about plant fiber reinforced polylactic acid foam material, which is mainly because of the low melt strength of polylactic acid on the one hand, and the poor compatibility of natural fibers and polylactic acid on the other hand, which makes plant fiber reinforced Polylactic acid foam material is difficult to prepare

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Weigh the ingredients according to the weight ratio of poly-DL-lactic acid, corn stalk fiber powder, talcum powder, AC foaming agent, antioxidant 1010, and maleic anhydride 84:10:1:2:1:2, and mix them uniformly Knead for 5 minutes at 160°C and 60 r / min in a Haake torque rheometer to obtain a homogeneous blend. After the blend is cooled, place it in a pulverizer and pulverize it. Put the pulverized pellets in a mold at 160°C and press them into sheets, and then place them in an oven at 200°C for free foaming for 10 minutes to obtain the plant fiber-reinforced Polylactic acid foam material, its apparent density is 0.43g / cm 3 .

Embodiment 2

[0039] Weigh the ingredients according to the weight ratio of poly-DL-lactic acid, ramie fiber powder, silicon dioxide, foaming agent DPT, antioxidant 1010, and maleic anhydride 56:40:1:1:1:1, and mix them uniformly Mix in a Haake torque rheometer at 180°C and 50r / min for 3min to obtain a homogeneous blend of materials. After the blend is cooled, place it in a pulverizer and pulverize it. Put the pulverized pellets in a mold at 180°C and press them into sheets, and then place them in an oven at 200°C for free foaming for 10 minutes to obtain a plant fiber-reinforced Polylactic acid foam material, its apparent density is 0.33g / cm 3 .

Embodiment 3

[0041] Weigh the ingredients according to the weight ratio of poly-DL-lactic acid, bamboo fiber powder, calcium carbonate, foaming agent OBSH, antioxidant 1010, and acrylic acid 74:10:5:5:1:5, and mix them uniformly Mix in a moment rheometer at 140°C and 70r / min for 5min to obtain a blend with uniform materials. After the blend is cooled, place it in a pulverizer and pulverize it. Put the pulverized pellets in a mold at 140°C and press them into sheets, and then place them in an oven at 190°C for free foaming for 10 minutes to obtain a plant fiber-reinforced Polylactic acid foam material, its apparent density is 0.45g / cm 3 .

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Abstract

The invention discloses a plant fiber-reinforced polylactic acid foam material, which is prepared from the following components: 20 to 95 percent of polylactic acid, 1 to 60 percent of plant fiber powder, 1 to 5 percent of foaming agent, 1 to 5 percent of nucleating agent, 1 to 5 percent of antioxidant and 1 to 5 percent of bulking agent. The invention also discloses a preparation method for the material. The foam material has the advantages of low apparent density, biodegradability, no environmental pollution, capacity of replacing polyolefin foam materials, wide application in the fields of heat insulation, buffer and packaging, simple preparation process and high production efficiency.

Description

technical field [0001] The invention discloses a plant fiber reinforced polylactic acid (PLA) foaming material and a preparation method thereof, belonging to the technical field of polymer processing. Background technique [0002] At present, expanded polystyrene (EPS) occupies the main market share of daily plastic consumption due to its advantages of light weight, low price, oil resistance and waterproof. However, waste polystyrene is not degradable under natural conditions, causing serious "white pollution" and bringing huge pressure to the environment; moreover, polystyrene uses non-renewable petrochemical resources as raw materials, and petrochemical resources are facing facing the crisis of increasing energy shortage. Therefore, this is undoubtedly a material that is contrary to low-carbon economy and sustainable development, and it is urgent to seek a new, degradable and environmentally friendly material. [0003] Polylactic acid is a thermoplastic biodegradable mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08K13/02C08J9/08C08J9/10
Inventor 高德张萍王瑜
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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