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生物降解颗粒的降解原理分析

生物降解颗粒的降解原理分析

来源网址:https://www.swjjkl.com/ 2021-01-29 17:10:47    

生物降解颗粒按其生物降解过程大致可分为两类。

Biodegradable particles can be roughly divided into two types according to their biodegradation process.
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.
生物降解颗粒
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 can be degraded to the extent that the microorganism can digest it and decompose 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,华潍自主研发的膨润土改性淀粉复合材料(BMSC )是以淀粉为基质通过熔融插层塑化挤出工艺生产的完全生物降解材料。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 the common plastic products in our life are partially degradable, and the starch based plastic products have good degradation effect. The bentonite modified starch composite (BMSC) developed by Huawei is a completely biodegradable material based on starch by melt intercalation plasticizing extrusion process. The material does not contain polyolefin plastics, and has the characteristics of high cost performance, natural antistatic, low carbon and environmental protection, and the products can be recycled.
甚至,降解时间随不同环境变化而变化,例如在干燥环境下,降解时间则会长些,降解时间也是可控的。
Even, the degradation time varies with different environments. For example, in a dry environment, the degradation time is longer and the degradation time is controllable.