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Degradable starch-fiber composite foam material and preparation method thereof

A fiber composite and foam material technology, which is applied in the field of degradable starch fiber composite foam materials and its preparation, can solve the problems of complex preparation process, polluted foam material performance, etc., and achieves wide raw material sources, uniform cell distribution, and resilience performance. Good results

Inactive Publication Date: 2020-05-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a degradable starch fiber composite foam material and its preparation method, which solves the problems in the prior art that the preparation process of the starch-based foam material is complicated, causing pollution and poor performance of the prepared foam material

Method used

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  • Degradable starch-fiber composite foam material and preparation method thereof
  • Degradable starch-fiber composite foam material and preparation method thereof
  • Degradable starch-fiber composite foam material and preparation method thereof

Examples

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preparation example Construction

[0040] The preparation method of the degradable starch fiber composite foam material of the present invention has the following steps:

[0041] 1) Prepare small fibers for use;

[0042] 2) Mix starch and plasticizer, add distilled water and stir evenly, stir at 85℃~100℃, and perform gelatinization treatment to obtain gelatinized starch;

[0043] 3) Take the filler and ultrasonically disperse it in water to obtain a dispersion, add the dispersion to the gelatinized starch and stir evenly to obtain sample A;

[0044] 4) Add the fiber to sample A, stir evenly to obtain sample B;

[0045] 5) Pour sample B into a mold, cool it to room temperature, and refrigerate it at 0-5°C for 24 hours, adjust the freezing temperature to -15~-30°C, and freeze for 12-25 hours to obtain sample C;

[0046] 6) After thawing, sample C is sequentially placed in ethanol solutions with a concentration gradient of 20%, 40%, 60%, 80% and 100%, and the water in the system is removed and dried to obtain a degradable st...

Embodiment 1

[0054] 1) The cotton fiber is decomposed, refined to 45°SR, and sieved to obtain fine fibers for use;

[0055] 2) Mix 100 parts of tapioca starch, 15 parts of sorbitol and 15 parts of azodicarbonamide, add an appropriate amount of distilled water and stir evenly, and use a stirrer at 85℃ to stir at a speed of 600r / min until gelatinization is obtained. Cassava starch;

[0056] 3) Take 5 parts of calcium carbonate and ultrasonically disperse it in water to obtain a dispersion, add the dispersion to the gelatinized tapioca starch and stir evenly to obtain sample A;

[0057] 4) Add 10 parts of fiber to sample A and mix uniformly at a speed of 1000r / min to obtain sample B;

[0058] 5) Pour sample B into a mold, cool to room temperature, and after refrigerating at 1°C for 24 hours, adjust the freezing temperature to -20°C and freeze for 20 hours to obtain sample C;

[0059] 6) Thaw sample C in an alcohol solution with a concentration gradient of 20%, 40%, 60%, 80%, and 100%, remove the water...

Embodiment 2

[0063] 1) The softwood fiber is deflated, refined to 67°SR, and sieved to obtain fine fibers for use;

[0064] 2) Mix 100 parts of potato starch and 10 parts of azodicarbonamide, add an appropriate amount of distilled water and stir evenly, and stir with a mixer at a speed of 600r / min at 100°C until gelatinized to obtain gelatinized potato starch;

[0065] 3) Take another 2.5 parts of talc powder and ultrasonically disperse it in water to obtain a dispersion, and add the dispersion to the above gelatinized potato starch and stir evenly to obtain sample A;

[0066] 4) Add 20 parts of fine fibers to sample A and mix them evenly with a stirrer at a speed of 600r / min to obtain sample B;

[0067] 5) Pour sample B into a mold, cool it to room temperature, and after refrigerating at 0°C for 24 hours, adjust the freezing temperature to -25°C and freeze for 14 hours to obtain sample C;

[0068] 6) Thaw sample C in an alcohol solution with a concentration gradient of 20%, 40%, 60%, 80%, and 100%,...

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Abstract

A degradable starch fiber composite foam material and a preparation method thereof are disclosed. According to the material, fibers and starch are mixed. Compared with traditional petroleum-based rawmaterials, the used raw materials are environmentally friendly, degradable, safe and non-toxic; compared with extrusion and mould pressing process methods, the method adopts a freezing replacement method, has low requirements on operation equipment, and is simple and safe to operate. A gradient ethanol replacement method is used in a drying mode, after starch paste is frozen, water in a system isreplaced with a volatile solvent with low surface tension, so that surface structure change caused by sudden loss of material moisture can be avoided, and foam holes are protected against collapse. The prepared starch-fiber composite foam material is uniform in foam hole distribution, high in porosity, good in rebound resilience, high in mechanical property and low in density.

Description

Technical field [0001] The invention belongs to the field of polymer material preparation, and relates to a degradable starch fiber composite foam material and a preparation method thereof. Background technique [0002] Traditional foam materials are mainly made of petroleum, which is easy to process. They are often prepared by extrusion and blow molding. They are used in large quantities in production and daily life. However, this material is not easy to rot and degrade in nature. If it cannot be processed reasonably Will cause great pollution to the environment. In addition, petroleum raw materials are non-renewable resources, and long-term use of these materials is not conducive to sustainable development. [0003] Both starch and fiber are renewable resources with a wide range of sources, low prices, and fully degradable. Foam materials prepared from starch fiber composites are low-cost, easy to process, degradable, and renewable, and are the hotspot in the research and develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L1/02C08L97/02C08K3/26C08K3/34C08J9/28
CPCC08J9/0061C08J9/0066C08J9/28C08J2303/02C08J2401/02C08J2497/02C08K3/34C08K2003/265
Inventor 殷学风袁枚林涛王瑞晨张希娟范晶李静段敏
Owner SHAANXI UNIV OF SCI & TECH
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