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Biodegradable polyester/cellulose composite film blowing material and preparation method thereof

A technology for biodegrading polyester and cellulose, which is applied in the field of composite materials, can solve the problems of high molecular weight of modifiers and poor plasticizing effect of starch, and achieve the effects of excellent product performance, reduced strength, and not easy to age

Pending Publication Date: 2020-06-16
SHENZHEN HONGCAI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the fully degradable thermoplastic composite material prepared by the invention can reduce the production cost, the modifier used in the preparation of thermoplastic starch has a high molecular weight and the plasticizing effect of the starch is poor. Therefore, there is still room for improvement

Method used

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  • Biodegradable polyester/cellulose composite film blowing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. The influence of the content of different compatibilizer components on the properties of biodegradable polyester / cellulose composite blown film materials

[0028] A biodegradable polyester / cellulose composite blown film material is made of the following components: 35 parts of polyadipate / butylene terephthalate PBAT, 10 parts of polypropylene carbonate polyol PPC, chain extension 0.01 parts of polylactic acid PLA, 8 parts of PLA, 25 parts of starch, 20 parts of cellulose, 2 parts of compatibilizer, 1 part of stabilizer, 1 part of anti-aging agent; of which, the compatibilizer components and their weight percentages are shown in Table 1. .

[0029] Table 1 Different components of compatibilizer and their weight percentages

[0030]

[0031] Refer to GB / T 1040.3, QB / T 2538, GB / T 1038 and GB / T 2679.3 to determine the properties of the materials obtained. See Table 2 for the results obtained.

[0032] Table 2 Material performance test results of different components of ...

Embodiment 2

[0035] Embodiment 2. Biodegradable polyester / cellulose composite blown film material and preparation method thereof

[0036] Formula: 40 parts of polyadipate / butylene terephthalate, 12 parts of polypropylene carbonate polyol, 0.02 parts of trimethylolpropane, 10 parts of polylactic acid PLA, 30 parts of starch, 21 parts of cellulose , Maleic anhydride grafted vinyl acetate copolymer 3 parts, stabilizer (calcium stearate and zinc laurate mixed in a weight ratio of 1:1) 2 parts and benzophenone-3 1.5 parts.

[0037] Among them, the compatibilizer maleic anhydride grafted vinyl acetate copolymer is polymerized from the following raw materials and their weight percentages: maleic anhydride 18%, benzoyl peroxide 8% and ethylene-vinyl acetate copolymer 35%.

[0038] Preparation:

[0039] S1. Put starch and cellulose into a high-speed mixer at a speed of 300 rpm / min and stir for 5 minutes to mix the starch and cellulose uniformly to form a premix;

[0040] S2. The stabilizer and anti-aging ag...

Embodiment 3

[0042] Example 3. Biodegradable polyester / cellulose composite blown film material and preparation method thereof

[0043] Formula: 45 parts of polyadipate / butylene terephthalate, 14 parts of polypropylene carbonate polyol, 0.025 parts of trimethylolpropane, 12 parts of polylactic acid, 33 parts of starch, 23 parts of cellulose, Maleic anhydride grafted vinyl acetate copolymer 4 parts, stabilizer (calcium stearate and zinc laurate mixed at a weight ratio of 1:1) 2.5 parts, benzophenone-3 2 parts.

[0044] Among them, the compatibilizer maleic anhydride grafted vinyl acetate copolymer is polymerized from the following raw materials and their weight percentages: maleic anhydride 15%, benzoyl peroxide 7% and ethylene-vinyl acetate copolymer 33%.

[0045] Preparation:

[0046] S1. Put the starch and cellulose into a high-speed mixer, rotate at 300 rpm / min, and stir for 7 minutes to mix the starch and cellulose uniformly to form a premix;

[0047] S2. The stabilizer and anti-aging agent are ...

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Abstract

The invention relates to the field of composite materials, and provides a biodegradable polyester / cellulose composite film blowing material and a preparation method thereof, aiming at the problems ofpoor starch plasticizing effect, low material comprehensive performance and the like. According to a technical scheme, the material is prepared from the following raw materials in parts by weight: 35to 50 parts of poly(butylene adipate-co-terephthalate) (PBAT), 10 to 15 parts of polypropylene carbonate polyol (PPC), 0.01 to 0.03 part of a chain extender, 8 to 15 parts of polylactic acid (PLA), 25to 35 parts of starch, 20 to 25 parts of cellulose, 2 to 5 parts of a compatilizer, 1 to 3 parts of a stabilizer and 1 to 3 parts of an anti-aging agent. The material is simple in formula, good in compatibility and good in mechanical property, the plasticity and strength of the composite material are improved, the degradation property is excellent, and the environment is not polluted.

Description

Technical field [0001] The invention relates to the field of composite materials, in particular to a biodegradable polyester / cellulose composite blown film material and a preparation method thereof. Background technique [0002] Biodegradable polyester is a type of polymer material that uses biological resources as raw materials. Compared with petroleum-based polymers using petrochemical resources as raw materials, biodegradable polyester can be degraded under composting conditions. At present, biodegradable polyester is biodegradable One of the most active degradable materials in plastics research and market application. [0003] Usually, the production of biodegradable composite materials such as biodegradable polyester can be achieved by combining starch, polycaprolactone (PLC), polybutylene succinate (PBS), polyadipate / butylene terephthalate Biodegradable polymers such as esters (PBAT) are mixed. The common process is to prepare graft copolymers of starch and / or polyester, and...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L69/00C08L67/04C08L1/02C08L51/00C08L3/02C08J5/18
CPCC08J5/18C08J2367/02C08J2469/00C08J2467/04C08J2401/02C08J2451/00C08J2403/02
Inventor 李积迁陈晓江郭健杨宏
Owner SHENZHEN HONGCAI NEW MATERIAL TECH
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