PBAT composite modified biodegradable material and preparation method thereof

Abstract

The invention belongs to the technical field of biodegradable materials, and particularly relates to a PBAT composite modified biodegradable material and a preparation method thereof. The PBAT composite modified biodegradable material is prepared from the following components in parts by weight: 50-70 parts of PBAT, 20-30 parts of wheat straw, 4-10 parts of PLA, 2-6 parts of a filling agent, 0.2-0.6 part of a plasticizer, 2-8 parts of a lubricating agent, 0.1-0.5 part of a chain extender and 0.2-2.0 parts of a heat stabilizer. The PBAT composite modified biodegradable material provided by the invention has better ductility and elongation at break, strong flame retardant property and low cost, and is beneficial to market promotion; and the invention also provides a preparation method thereof.

Description

technical field [0001] The invention belongs to the technical field of biodegradable materials, and in particular relates to a PBAT composite modified biodegradable material and a preparation method thereof. Background technique [0002] PBAT (a copolymer of butylene adipate and butylene terephthalate), PBAT is a thermoplastic biodegradable plastic, which has the characteristics of both PBA and PBT, and has good ductility and elongation at break , also has good heat resistance and impact performance; in addition, it also has excellent biodegradability, and is very active in the research of biodegradable plastics and one of the best degradable materials in the market. However, the product is single, expensive, and the cost of degradable plastic products is high. The raw material cost of a plastic bag is nearly one yuan, and the number of people who accept it is small. The modified PBAT products on the market are uneven and of different quality, which is not conducive to the m...

AI Technical Summary

Problems solved by technology

However, the product is single, expensive, and the cost of degradable plastic products is high. The raw material cost of a plastic bag is nearly one yuan, and the number of people who accept it is small. The modified PBAT products on the market are uneven and of different quality, which is not conducive to the market promotion of degradable plastics.

[0003] CN201910485627.3 discloses a straw powder / PLA / PBAT biomass fully degradable plastic and its preparation method, including 15-30 parts of straw powder, 35-50 parts of PLA, 35-50 parts of PBAT, 2-4 parts of plasticizer, coupling 1-3 parts of agent, 1-3 parts of chain extender, 1-3 parts of lubricant, 1-3 parts of heat stabilizer, 0.1-0.3 parts of antioxidant, first carry out alkaline hydrolysis of straw powder, sulfuric acid swelling, ultrasonic The preparation method of breaking the wall and then mixing with other additives for twin-screw extrusion granulation reduces the cost and obtains better performance, but the processing method of straw powder is complicated, the process steps are many, and the other additives are single and the formula is single. , the applicability is not wide, and at the same time, the proportion of PLA is large, which is the same as that of PBAT, and the proportion of straw powder is small. The price of PLA is high, and the cost is still high

[0004] CN201611193435.8 discloses a preparation method of lignin-modified full bio-based PBAT biodegradable plastics. The ratio of raw materials is 60-80 parts of bio-based PBAT, 20-40 parts of lignin, 0.1-0.3 parts of antioxidant, chain extension 0.5 to 1.5 parts of plasticizer, 0.1 to 0.3 parts of plasticizer, 0.2 to 0.4 parts of heat stabilizer, 0.4 to 0.6 parts of lubricant; through mixing, extrusion granulation and film blowing, lignin-modified PBAT biodegradable plastics can be obtained , enhance the mechanical properties of bio-based PBAT resin, reduce the cost of this kind of plastic, but the elongation at break and ductility of lignin-modified PBAT are still poor

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