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Starch-based fully-degradable nano antibacterial material and preparation method thereof

A nanometer antibacterial material and a fully degradable technology, applied in the field of starch-based fully degradable nanometer antibacterial materials and preparation, can solve the problems of poor mechanical properties, brittleness, bacterial contamination, etc., and achieve the effect of strong compression resistance

Pending Publication Date: 2020-09-22
上海麟定生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this material is brittle, fragile, poor mechanical properties, extensive use of chemical additives, poor environmental adaptability, and bacterial contamination, which cannot meet the requirements of most industrial, food, and sanitary products. scene application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Material ratio (by weight):

[0043] 100 parts of corn starch, 5 parts of cane pulp fiber, 0.5 part of nano-chitosan, 0.02 part of carbon nanotube, 0.003 part of cellulose nanocrystal, 0.2 part of surfactant, and 120 parts of water.

[0044] 2. Mix 40 parts of sugarcane pulp fibers, carbon nanotubes, cellulose nanocrystals, surfactants and water of the above components and stir at 85 degrees and 2000 rpm for 30 minutes for later use.

[0045] 3. Add 15 parts of starch and nano-chitosan to the above-mentioned components into a mixer, and knead at 85 degrees for 30 minutes to modify and set aside.

[0046] 4. After adding 80 parts of water at 100 degrees to the material obtained in step 3, stir at 1500 rpm for 20 minutes to obtain a nano starch solution.

[0047] 5. Add the materials obtained in step 4 to 2, and stir for 15 minutes at 90 degrees and 1500 rpm.

[0048] 6. Add 75 parts of starch into step 5, and stir for 30 minutes at 80 degrees and 1000 rpm.

[0049]...

Embodiment 2

[0052] 1. Material ratio (by weight):

[0053] 100 parts of corn starch, 45 parts of cane pulp fiber, 0.5 part of nano-chitosan, 0.02 part of carbon nanotube, 0.003 part of cellulose nanocrystal, 0.2 part of surfactant, and 200 parts of water.

[0054] 2. Mix 120 parts of sugarcane pulp fibers, carbon nanotubes, cellulose nanocrystals, surfactants, and water of the above components and stir at 85 degrees and 2000 rpm for 30 minutes for later use.

[0055] 3. Add 20 parts of starch and nano-chitosan to the mixer, and knead at 85 degrees for 30 minutes for modification.

[0056]4. After adding 80 parts of water at 100 degrees to the material obtained in step 3, stir at 1500 rpm for 20 minutes to obtain a nano starch solution.

[0057] 5. Add the materials obtained in step 4 to 2, and stir for 15 minutes at 90 degrees and 1500 rpm.

[0058] 6. Add 80 parts of starch to step 5, and stir for 30 minutes at 80 degrees and 1000 rpm.

[0059] 7. Inject part of the materials obtained...

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Abstract

The invention discloses a starch-based fully-degradable nano antibacterial material and a preparation method thereof. The starch-based fully-degradable nano antibacterial material is prepared from thefollowing substances in parts by weight: 80 to 100 parts of starch, 5 to 50 parts of plant fibers, 0.1 to 3 parts of nano chitosan, 0.01 to 0.1 part of carbon nanotubes, 0.001 to 0.1 part of cellulose nanocrystals, 0.1 to 1 part of a surfactant and 65 to 200 parts of water. According to the invention, a plurality of methods such as starch modification, nano chitosan, carbon nanotubes, cellulose nanocrystalline, plant fiber modification, injection molding, micro-explosion foaming and the like are combined to obtain the light-weight, antibacterial and fully-degradable nano material; meanwhile,the material has stronger pressure resistance and bursting strength than common starch products; the whole production process is free of wastewater, waste gas and waste residues, safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of nano antibacterial new materials, and in particular relates to a starch-based fully degradable nano antibacterial material and a preparation method. Background technique [0002] Due to the deteriorating global ecological environment due to the extensive use of non-degradable petroleum-based plastics and their derivatives, countries have introduced policies and legislation to restrict or prohibit the use of non-degradable plastic products, which has spawned a large number of plastic substitute products bio-based plastics. [0003] Bio-based plastics have been widely used for a long time due to the limitations of limited raw material sources, high production costs, the need for biocomposting to effectively degrade and difficult recycling. Therefore, some substitutes for vegetable starch modification and adding petroleum-based or bio-based plastics have emerged on the market; these products have disintegrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L97/02C08L5/08C08L1/02C08K3/04C08J9/30
CPCC08J9/0061C08J9/0071C08J9/0085C08J9/30C08J2303/02C08J2401/02C08J2405/08C08J2497/02
Inventor 邓小勇何曙光孙美常庆
Owner 上海麟定生物科技有限公司
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