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Biodegradable composite material prepared by excessive processing materials of high-starch crops and preparation method thereof

A technology of biodegradable and composite materials, applied in the field of biodegradable composite materials and their preparation, can solve the problems of undisclosed biodegradable composite materials, achieve performance balance, avoid environmental damage, and improve economic benefits

Active Publication Date: 2015-01-28
常州龙骏天纯环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art has not disclosed biodegradable composite materials made from high starch crop processing residues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0027] The processing residue of high-starch crops described in this embodiment is the remaining residue after the sweet potato starch is extracted by the existing technology. At present, the extraction process of mechanized sweet potato starch mainly includes steps such as material selection, cleaning, crushing, screening, sand removal, sedimentation, dehydration, drying, and packaging; wherein the crop processing residues described in this embodiment are in the screening step get in. When sieving, since the sweet potato dross is a long and thin fiber, its volume is larger than that of starch granules, its expansion coefficient is also larger than that of starch granules, and its specific gravity is lighter than that of starch granules. The starch slurry water contained in the slag is filtered out from the sieve, and the starch slurry above the sieve is the sweet potato processing residue. The main chemical components of sweet potato processing residues are cellulose and hem...

Embodiment 2）

[0038] The processing residue of high-starch crops described in this embodiment is the residue left after starch is extracted from artichokes by existing techniques. Similar to the sweet potato residue in Example 1, the potato residue of the crop processing residue in this embodiment is obtained in the screening step. When sieving, because the potato residue is a long and thin fiber, its volume is larger than that of starch granules, its expansion coefficient is also larger than that of starch granules, and its specific gravity is lighter than that of starch granules. The starch slurry water contained in the slag is filtered out from the sieve, and the starch slurry above the sieve is the potato processing residue. The main chemical components of potato processing residues are cellulose and hemicellulose.

[0039] Pretreatment is carried out on the processing leftover potato residue obtained after sieving, and the pretreatment is to dry the potato residue so that the moisture...

Embodiment 3）

[0049] The processing residue of high starch crops described in this embodiment is the remaining residue after starch is extracted from konjac by existing technology. Similar to the sweet potato dregs in Example 1, the konjac dregs of the crop processing residue in this embodiment are obtained in the screening step. When sieving, because konjac residue is a long and thin fiber, its volume is larger than that of starch granules, its expansion coefficient is also larger than that of starch granules, and its specific gravity is lighter than that of starch granules. The starch slurry water contained in the slag is filtered out from the sieve, and the residue above the sieve after the starch slurry is filtered is the konjac processing residue. The main chemical components of konjac processing residues are cellulose and hemicellulose.

[0050] Pretreatment is carried out on the konjac slag obtained after sieving, wherein the pretreatment is to dry the konjac slag in the shape of ko...

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Abstract

The invention discloses a biodegradable composite material prepared by excessive processing materials of high-starch crops and a preparation method thereof. The preparation method for the composite material comprises the following steps: subjecting PLA (polylactic acid), PBS (polybutylene succinate), the excessive materials of the crops, and a cross-linking agent to vacuum drying respectively, and enabling the temperature to be lower than 65 DEG C; sufficiently mixing the dried raw materials in an agitating pan, feeding the uniformly mixed material to a double-screw extruder; and mixing and extruding the material through screws in the double-screw extruder to obtain a granulous product which is the biodegradable composite material prepared by the excessive processing materials of the high-starch crops. The toughness of the biodegradable composite material is better than that of PLA, the tensile strength is slightly poorer than that of PLA but does not affect the utilization, and the material can be subjected to secondary forming processing by a frequently-used plastic processing manner such as injection molding, performing and the like.

Description

technical field [0001] The invention relates to the field of materials, in particular to a biodegradable composite material prepared from high-starch crop processing residues and a preparation method thereof. Background technique [0002] High-starch crops such as sweet potatoes, taro, and potatoes are widely planted in my country. According to the current processing methods, after the starch is extracted from these crops, there will still be a large amount of crop processing residue. However, there is no large-scale and high-efficiency utilization method for these crop processing residues except that they are used as roughage after drying; and when some starch extraction plants are small in scale or there are no large farms around the factory, these residues are often used directly. Throw it away as garbage, which on the one hand causes a waste of resources, and on the other hand causes environmental pollution after the leftover material rots. The above-mentioned high-star...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L67/02C08L1/02C08L5/14C08L97/00C08K5/103C08K5/3492B29C47/92B29C48/92
CPCB29C47/92B29C48/04B29C48/40B29C48/92B29C2948/92514B29C2948/92704B29C2948/92895
Inventor 支朝晖吴迪
Owner 常州龙骏天纯环保科技有限公司
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