含有玉米淀粉的PLA可降解颗粒生物降解材料如何

聚乳酸（pla）是 可降解颗粒生物降解的生物基脂肪族聚酯，衍生自可再生来源，如马铃薯、甘蔗和玉米。pla是透明的可生物降解材料，且有良好的气体阻隔性能；与羟基脂肪酸酯（pha）、聚乙二醇（peg）等生物材料相比，pla

Polylactic acid (pla) is a biodegradable bio based aliphatic polyester derived from renewable sources, such as potato, sugarcane and corn. Pla is a transparent biodegradable material with good gas barrier property; Compared with biological materials such as hydroxy fatty acid ester (pha) and polyethylene glycol (peg), pla

有更好的热加工性能，可用多种成型加工方式；pla力学性能突出，与通用塑料聚苯乙烯（ps）相似；pla对生物体无毒害作用；使用后在自然环境中一段时间内经微生物作用完全分解生成的二氧化碳和水又可被其原料来源作物（玉米、土豆等）光合作用过程吸收，维持地球上碳循环的平衡。

It has better hot working performance and can be processed in various ways; Pla has outstanding mechanical properties, which are similar to polystyrene (ps); Pla has no toxic effect on organisms; After use, the carbon dioxide and water completely decomposed by microorganisms in the natural environment for a period of time can be absorbed by the photosynthesis process of the crops from which the raw materials are derived (corn, potatoes, etc.), maintaining the balance of the carbon cycle on the earth.

因此，pla的开发符合绿色化学和工程原理，一方面在工农业、生物医学和包装等领域有广阔的应用前景，另一方面小化源头污染和对人类健康和环境产生的风险，同时减缓石油资源的压力，增强材料的可持续性。

Therefore, the development of pla conforms to the principles of green chemistry and engineering. on the one hand, it has broad application prospects in the fields of industry, agriculture, biomedicine and packaging, on the other hand, it minimizes the source pollution and risks to human health and the environment, while reducing the pressure on oil resources and enhancing the sustainability of materials.

pla在包装领域应用前景广阔，但是在室温下模量高但脆性大的缺陷导致pla制品在使用过程中易发生断裂现象，严格阻碍了pla取代传统聚合物的步伐，因此对pla进行增韧改性成为必然。

Pla has a broad application prospect in the packaging field, but the defects of high modulus but high brittleness at room temperature lead to the fracture phenomenon of pla products in the use process, which strictly hinders the pace of replacing traditional polymers with pla, so it is inevitable to toughen pla.

聚己二酸对苯二甲酸丁二酯(pbat)是柔韧性良好的脂肪族芳香族共聚酯，具有良好的生物降解性。pbat加工性能优良，可进行吹制加工和挤出涂覆，常用于增韧改性聚乳酸，以期得到成型加工性能更好柔韧性更佳的pla/pbat全生物降解复合材料，扩展pla在包装行业的应用。但是pla与pbat两相仅部分相容，直接将pla与pbat共混，只能在一定程度上提高韧性。

Poly (butylene adipate terephthalate) (pbat) is a flexible aliphatic aromatic copolyester with good biodegradability. Pbat has excellent processability and can be used for blowing processing and extrusion coating. it is often used to toughen and modify polylactic acid in order to obtain pla/pbat biodegradable composites with better molding processing performance and flexibility, and expand the application of pla in the packaging industry. However, the two phases of pla and pbat are only partially compatible. directly blending pla and pbat can only improve the toughness to a certain extent.

此外，pla的价格偏高也限制了其使用的推广。因此，可以采用玉米淀粉进行填充，但是由于淀粉羟基含量高所以极性高，直接与聚乳酸共混后两相结合力低，导致复合材料强度低。因此，有必要对现有技术进行改进以解决上述技术问题。更多相关技术内容就来我们网站 //www.ucgmex.com咨询吧！

In addition, the high price of pla also limits the promotion of its use. Therefore, corn starch can be used for filling, but the polarity of starch is high due to its high hydroxyl content, and the two-phase cohesion is low after directly blending with polylactic acid, resulting in low strength of the composite. Therefore, it is necessary to improve the existing technology to solve the above technical problems. More relevant technical content will come to our website //www.ucgmex.com Consult!