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Biodegradable blend and preparation method and application thereof

A biodegradable and blended technology, applied in the direction of conjugated rayon, conjugated synthetic polymer rayon, chemical characteristics of fibers, etc., can solve the problem of low elongation, poor mechanical properties, product application limitations, etc. problems, to achieve the effect of good compatibility, good mechanical properties, and a wide range of sources

Active Publication Date: 2013-05-15
东莞市绿睿塑胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used thermoplastic starch preparation method is to blend and extrude starch and plasticizer to prepare biodegradable plastics. However, the current thermoplastic starch-based degradable plastics have poor mechanical properties and low elongation. The application of products is limited

Method used

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  • Biodegradable blend and preparation method and application thereof
  • Biodegradable blend and preparation method and application thereof
  • Biodegradable blend and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Weigh 80 parts by weight of cornstarch and 5 parts by weight of α-amylase and stir and mix them in a high-speed mixer for 10 minutes, leave to stand for 10 minutes to prepare dextrin, stir and mix the prepared dextrin with 15 parts by weight of glycerin at a low speed and then place in a dense The thermoplastic dextrin was prepared by kneading in a mill for 5 minutes.

[0064] Get thermoplastic dextrin, polylactic acid, PBSA and other materials to join in the blender mechanical blending according to the weight portion shown in Table 1, then join the material after mixing in the twin-screw extruder extruding granulation, obtain Biodegradable blend. The tensile strength, elongation at break, notched impact strength, flexural strength and flexural modulus of the biodegradable blends were tested, and the test results are listed in Table 1.

Embodiment 2

[0066] Weigh 60 parts by weight of cornstarch and 10 parts by weight of beta-amylase and mix them in a high-speed mixer for 10 minutes, leave to stand for 10 minutes to prepare dextrin, and prepare the resulting dextrin with 25 parts by weight of glycerol and 5 parts by weight of acetylcitric acid The tributyl ester was stirred and mixed uniformly at a low speed, and then kneaded in an internal mixer for 8 minutes to prepare thermoplastic dextrin.

[0067] Get thermoplastic dextrin, polylactic acid, PBSA and other materials to join in the blender mechanical blending according to the weight portion shown in Table 1, then join the material after mixing in the twin-screw extruder extruding granulation, obtain Biodegradable blend. The tensile strength, elongation at break, notched impact strength, flexural strength and flexural modulus of the biodegradable blends were tested, and the test results are listed in Table 1.

Embodiment 3

[0069] Weigh 78 parts by weight of cornstarch and 2 parts by weight of α-amylase, stir and mix in a high-speed mixer for 10 minutes, leave to stand for 10 minutes to prepare dextrin, and stir the prepared dextrin with 15 parts by weight of glycerin and 5 parts by weight of water at a low speed After mixing evenly, it is plasticized in a single-screw extruder to obtain thermoplastic dextrin.

[0070] Get thermoplastic dextrin, polylactic acid, PBSA and other materials to join in the blender mechanical blending according to the weight portion shown in Table 1, then join the material after mixing in the twin-screw extruder extruding granulation, obtain Biodegradable blend. The tensile strength, elongation at break, notched impact strength, flexural strength and flexural modulus of the biodegradable blends were tested, and the test results are listed in Table 1.

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Abstract

The invention provides a biodegradable blend and a preparation method and application thereof. The biodegradable blend mainly comprises thermoplastic dextrin, polylactic acid, PBSA (poly(butylene succinate-co-adipate)), a chain extender, a lubricating agent and inorganic filler, wherein a preparation method of the thermoplastic dextrin comprises the following steps of: 1) mixing starch and amylase, and standing for 10-20 minutes to obtain dextrin, wherein the weight ratio of the starch to the amylase is (52-80):(2-10); and 2) uniformly mixing the dextrin obtained in the step 1) and a plasticizer and mixing to obtain the thermoplastic dextrin, wherein the weight ratio of the dextrin to the plasticizer is (60-85):(5-40). The blend provided by the invention is an environment-friendly completely-biodegradable material which is widely available and is a renewable resource; and the biodegradable blend provided by the invention has good compatibility, better mechanical property and wider application fields.

Description

technical field [0001] The invention relates to the field of degradable plastics, in particular to a biodegradable blend, a preparation method and an application thereof. Background technique [0002] The increasing severity of white pollution has led to efforts to research and develop new biodegradable bioplastics to replace ordinary non-degradable plastics. Starch has a wide range of sources, a variety of varieties, low cost, and can be completely degraded in various natural environments without causing any pollution to the environment. It has become the most researched and developed type of biodegradable plastics at home and abroad. Native starch exists in the state of small granules with a crystalline structure inside, and its molecular structure has two types: straight chain and branched chain. [0003] The commonly used thermoplastic starch preparation method is to blend and extrude starch and plasticizer to prepare biodegradable plastics. However, the current thermop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L67/04C12P19/14C08K13/02B29B9/06D01F8/14D01F8/18
Inventor 熊凯焦建钟宇科苑仁旭赵巍徐依斌曾祥斌蔡彤旻夏世勇
Owner 东莞市绿睿塑胶科技有限公司
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