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A plant fiber starch biomass composite material with open cell structure and its preparation method and application

A technology of plant fiber starch and composite materials, which is applied in the field of green production and preparation, can solve the problems of insufficient compressive strength, uneven and fine cells, and long degradation cycle, etc., to improve the overall use effect, improve various properties, and simple adding sequence Effect

Active Publication Date: 2021-07-23
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Plastic products are widely used, which brings great convenience to people's life. At the same time, it causes huge environmental pollution due to its non-degradability. In order to reduce and limit the use of plastic products, people are looking for alternatives to plastic products worldwide. Products, such as PLA / PHA / PVA, etc., the use of these materials has problems such as long production cycle, long degradation cycle, and complicated process preparation. The new generation of plant fiber / starch-based biomass composite materials has also been widely proposed. With the In the development of products, people have proposed to study and prepare a new type of plant fiber / starch composite material with fully degradable biomass and fully open cell structure with low cost and good water resistance.
[0004] However, the inventors found that the products of biomass materials with fully open cell structure currently prepared by people have the disadvantages of insufficient compressive strength, high moisture absorption rate and low cushioning performance caused by insufficiently uniform and fine cells.

Method used

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  • A plant fiber starch biomass composite material with open cell structure and its preparation method and application
  • A plant fiber starch biomass composite material with open cell structure and its preparation method and application
  • A plant fiber starch biomass composite material with open cell structure and its preparation method and application

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preparation example Construction

[0040] A kind of preparation method of the plant fiber / lignin fiber / starch biomass composite material of open cell structure, comprises the following steps:

[0041] (1) The plant fibers are mechanically pulverized to obtain 2-5mm fibers, then soaked with hydrogen peroxide for 20-30 minutes, washed with water, and dried to obtain modified plant fibers.

[0042] (2) Take starch and calcium carbonate by weight, put starch, calcium carbonate and hydrogen peroxide into water for gelatinization, the gelatinization temperature is 80-90°C, and the gelatinization time is 20-30 minutes. With even stirring.

[0043] (3) Add foaming agent to the slurry prepared in step (2) and stir evenly for 5 minutes, then add modified sisal fiber, and stir the filler evenly for 35 minutes to obtain the final slurry.

[0044] (4) Put the mixed slurry in step (4) into the mold, set the temperature of the upper mold at 190-210°C, the stability of the lower mold at 190-210°C, and keep the pressure at 6-8...

Embodiment 1

[0049] (1) The sisal fiber was mechanically pulverized to obtain a 5mm fiber, then soaked with 6 parts of hydrogen peroxide for 25 minutes, washed with water until PH = 7, and dried to obtain the modified sisal fiber.

[0050] (2) Take 50 parts of cornstarch and 5 parts, 10 parts, 15 parts of calcium carbonate by weight, starch is put into water with calcium carbonate of different weight parts and 5 parts of hydrogen peroxide respectively and carry out gelatinization treatment, gelatinization temperature The temperature is 85°C, the gelatinization time is 30 minutes, and this process has been accompanied by uniform stirring.

[0051] (3) In the gelatinized starch prepared in step (2), first add 7 parts of azodicarbonamide and stir for 5 minutes, then add 50 parts of modified sisal fibers, and 70 parts of talc powder for 35 minutes, and obtain a uniform Quality mixed slurry.

[0052] (4) Put the mixed slurry in step (4) into the mold, set the temperature of the upper mold to 2...

Embodiment 2

[0064] (1) The rice straw fiber was mechanically pulverized to obtain a fiber of 2 mm, then soaked with 3 parts of urea for 30 minutes, washed with water until PH = 7, and dried to obtain the modified rice straw fiber.

[0065] (2) Take 75 parts of wheat starch and 12 parts of calcium carbonate by weight, put starch, calcium carbonate and 6 parts of sodium hypochlorite into water for gelatinization treatment, the gelatinization temperature is 80°C, and the gelatinization time is 30 minutes. Keep stirring evenly.

[0066] (3) In the gelatinized starch prepared in step (2), first add 5 parts of azodicarbonamide and stir for 8 minutes, then add 30 parts of modified rice straw fibers, and 50 parts of bentonite and stir for 40 minutes to obtain homogeneous Mix slurry.

[0067] (4) Put the mixed slurry in step (4) into the mold, set the temperature of the upper mold to 210°C, the stability of the lower mold to 205°C, and keep the pressure at 6MPa after mold closing to avoid air pre...

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Abstract

The invention belongs to the field of green production and preparation, and relates to a plant fiber starch biomass composite material with an open cell structure and a preparation method and application thereof. The present invention adopts the inorganic material calcium carbonate, uses the natural characteristics of calcium carbonate as a nucleating agent to cooperate with starch gelatinization and molded foaming, and utilizes the physical change characteristics in the material hot-pressed foaming process to improve the internal cell structure of the material Uniformity, etc., simple operation and low cost.

Description

technical field [0001] The invention relates to introducing an inorganic material into a plant fiber / starch biomass composite material with an open cell structure to improve the cushioning performance, cushioning strength, and water resistance of the material. It belongs to the field of green production preparation. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Plastic products are widely used, which brings great convenience to people's life. At the same time, it causes huge environmental pollution due to its non-degradability. In order to reduce and limit the use of plastic products, people are looking for alternatives to plastic products worldwide. Products, such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L97/02C08L97/00C08K3/26C08K3/34C08J9/10
CPCC08J9/0061C08J9/0066C08J9/0085C08J9/009C08J9/10C08J9/103C08J9/107C08J2203/04C08J2205/05C08J2303/02C08J2403/02C08J2497/00C08J2497/02
Inventor 李建勇李方义李剑峰满佳孙凯强纪冒丞张传伟
Owner SHANDONG UNIV
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