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生物降解材料的降解原理分析

生物降解材料的降解原理分析

来源网址:https://www.swjjkl.com/ 2021-04-09 15:01:44    

一类为完全生物降解材料,如天然高分子纤维素、人工合成的聚己内酯等,其分解作用主要来自:①由于微生物的迅速增长导致塑料结构的物理性崩溃;②由于微生物的生化作用、酶催化或酸碱催化下的各种水解;③其他各种因素造成的自由基连锁式降解。

One is completely biodegradable materials, such as natural polymer cellulose and synthetic polycaprolactone, whose decomposition mainly comes from: (1) the physical collapse of plastic structure due to the rapid growth of microorganisms; (2) various hydrolysis due to biochemical action of microorganisms, enzyme catalysis or acid-base catalysis; (3) free radical chain degradation caused by various other factors.
另一类为生物崩解性材料,如淀粉和聚乙烯的掺混物,其分解作用主要由于添加剂被破坏并削弱了聚合物链,使聚合物分子量降解到微生物能够消化的程度,分解为二氧化碳(CO2)和水。聚乙烯醇为可生物降解树脂,故淀粉基聚乙烯醇塑料可完全生物降解。
The other is the mixture of starch and polyethylene, whose decomposition is mainly due to the destruction and weakening of the polymer chain by additives, so that the molecular weight of the polymer is degraded to the extent that the microorganism can digest, and finally decomposes into carbon dioxide (CO2) and water. Polyvinyl alcohol is a biodegradable resin, so starch based polyvinyl alcohol plastic can be completely biodegradable.
目前生活中我们常见的塑料制品大部分是部分降解的,其中以淀粉基系的塑料制品的降解效果佳,材料不含聚烯烃塑料,具有高性价比、天然防静电性、低碳环保的特性,并且产物均是可以循环再利用的。
At present, most of our common plastic products in our life are partially degradable, among which the starch based plastic products have good degradation effect, and the materials do not contain polyolefin plastics, which have the characteristics of high cost performance, natural antistatic, low-carbon and environmental protection, and the products can be recycled.