Starch-PBAT degradable composite material and preparation method thereof

A composite material and starch technology, which is applied in the field of starch-PBAT degradable composite material and its preparation, can solve the problems of poor gas barrier performance, poor compatibility, and unsatisfactory use of packaging bags, so as to improve toughness and enhance tensile strength , Improve the effect of comprehensive performance

Active Publication Date: 2022-03-01
宁夏青林华源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 113121964 A discloses an environmentally friendly degradable packaging bag and its preparation method. The raw materials include 5-10 parts of polylactic acid (PLA) and 60-70 parts of polybutylene adipate / terephthalate (PBAT). , 25-30 parts of corn starch, and 0.1-0.3 parts of cross-linking agent; however, the compatibility between ordinary starch and PBAT interface is poor, resulting in poor gas barrier performance of the prepared packaging bag, which cannot meet the use of specific scenarios, such as cold Chain food vacuum packaging

Method used

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  • Starch-PBAT degradable composite material and preparation method thereof
  • Starch-PBAT degradable composite material and preparation method thereof
  • Starch-PBAT degradable composite material and preparation method thereof

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Embodiment 1

[0038] A kind of preparation method of starch-PBAT degradable composite material, comprises the steps:

[0039] Preparation of S1 ultra-fine starch: Dry corn starch in an oven at 55°C for 16 hours to reduce the moisture content to 5%, and use a fluidized bed jet milling system for crushing, set the feed amount to 12kg, feed frequency to 2Hz, and grind The pressure of the working medium is 0.6MPa, the rotating speed of the classifier is 3500r / min, and the crushing time is 90min to obtain superfine cornstarch;

[0040] Preparation of S2 starch-PBAT degradable composite material: get 30 parts by weight of superfine cornstarch prepared in step S1, 40 parts by weight of polybutylene adipate / terephthalate, 25 parts by weight of double crosslinked regenerated cellulose, 5 parts of epoxidized soybean oil, 3 parts by weight of zinc stearate, and 1 part by weight of oleic acid are mixed in a high-speed mixer, mixed for 15 minutes at 110 ° C, and then the mixed material is cooled to 35 °...

Embodiment 2

[0043] A kind of preparation method of starch-PBAT degradable composite material, comprises the steps:

[0044] Preparation of S1 ultra-fine starch: Dry corn starch in an oven at 55°C for 16 hours to reduce the moisture content to 5%, and use a fluidized bed jet milling system for crushing, set the feed amount to 12kg, feed frequency to 2Hz, and grind The pressure of the working medium is 0.6MPa, the rotating speed of the classifier is 3500r / min, and the crushing time is 90min to obtain superfine cornstarch;

[0045] Preparation of S2 starch-PBAT degradable composite material: get 30 parts by weight of superfine cornstarch prepared in step S1, 40 parts by weight of polyadipate / butylene terephthalate, 22.5 parts by weight of double crosslinked regenerated cellulose, 2.5 parts by weight of frankincense powder, 5 parts of epoxidized soybean oil, 3 parts by weight of zinc stearate, and 1 part by weight of oleic acid are mixed in a high-speed mixer, mixed for 15 minutes at 110 ° C,...

Embodiment 3

[0049] A kind of preparation method of starch-PBAT degradable composite material, comprises the steps:

[0050] Preparation of S1 ultra-fine starch: Dry corn starch in an oven at 55°C for 16 hours to reduce the moisture content to 5%, and use a fluidized bed jet milling system for crushing, set the feed amount to 12kg, feed frequency to 2Hz, and grind The pressure of the working medium is 0.6MPa, the rotating speed of the classifier is 3500r / min, and the crushing time is 90min to obtain superfine cornstarch;

[0051] Preparation of S2 starch-PBAT degradable composite material: get 30 parts by weight of superfine corn starch prepared in step S1, 40 parts by weight of polybutylene adipate / terephthalate, 25 parts by weight of frankincense powder, 5 parts of epoxy Mix soybean oil, 3 parts by weight of zinc stearate, and 1 part by weight of oleic acid into a high-speed mixer, mix at 110°C for 15 minutes, then cool the mixed material to 35°C, and place it at room temperature for 48 ...

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Abstract

The invention discloses a starch-PBAT degradable composite material and a preparation method thereof. The starch-PBAT degradable composite material comprises the following main raw materials in parts by weight: 20-40 parts of superfine starch, 40-50 parts of PBAT, 18-27 parts of bi-crosslinked regenerated cellulose, 2-3 parts of frankincense powder, 5-8 parts of a plasticizer, 3-5 parts of a lubricant, 1-3 parts of a dispersant and 1-3 parts of ionic liquid. Compared with the prior art, the starch-PBAT degradable composite material prepared according to the formula has good tensile property, hydrophobic property, antibacterial property and degradability.

Description

technical field [0001] The invention relates to the technical field of degradable plastics, in particular to a starch-PBAT degradable composite material and a preparation method thereof. Background technique [0002] As a new type of lightweight chemical material, plastics, together with steel, wood, and cement, are called the four pillars of the material field. Because of its advantages of light weight, durability, good formability and low processing cost, its usage has leapt to the first place in the world in terms of volume. Plastic products, often used as food packaging materials, play an important role in extending food shelf life, protecting food quality and hygiene. While plastic products are widely used in life and production, they have brought a lot of pressure to the living environment of human society. On the one hand, with the excessive exploitation and utilization of petrochemical resources, the reserves of petrochemical resources are gradually decreasing, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L3/02C08L1/08C08L93/00
CPCC08L67/02C08L2201/06C08L3/02C08L1/08C08L93/00
Inventor 林梦真
Owner 宁夏青林华源科技有限公司
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