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首页> 外文期刊>Journal of Polymers and the Environment >Method Of Producing Biodegradable Reference Material And Its Biodegradability Based On International Standard Evaluation Method (iso 14855-2)
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Method Of Producing Biodegradable Reference Material And Its Biodegradability Based On International Standard Evaluation Method (iso 14855-2)

机译：基于国际标准评估方法（iso 14855-2）的可生物降解参考材料的生产方法及其可生物降解性

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摘要

Returnable cups made of poly(lactic acid) (PLA) are employed as an example of products made of biodegradable plastics. Two kinds of PLA samples plates and powders with different shapes were prepared from PLA cups. The plates were cut from a cup using nippers. Powders were prepared using a rotation mechanical mixer for 45 min. PLA powders were separated by sieves with 60 meshes (250 μm) into a size ranging from 0 to 250 μm. An average diameter of powders separated by a sieve is 169 μm. Biodegradation tests of PLA plates, PLA powders and cellulose powders in controlled compost at 58 ℃ were performed using a Microbial Oxidative Degradation Analyzer (MODA) instrument according to ISO 14855-2. PLA powders showed almost the same biodegradation curve as that of cellulose powders. PLA plates biodegraded at a slower rate than PLA powders.
机译：以聚（乳酸）（PLA）制成的可回收杯被用作可生物降解塑料制成的产品的示例。用PLA杯制备了​​两种不同形状的PLA样品板和粉末。使用钳将板从杯子上切下。使用旋转机械混合器将粉末制备45分钟。用60目（250μm）的筛子将PLA粉末分离为0至250μm的大小。用筛子分离的粉末的平均直径为169μm。根据ISO 14855-2，使用微生物氧化降解分析仪（MODA）在58℃的受控堆肥中对PLA板，PLA粉和纤维素粉进行了生物降解测试。 PLA粉末的生物降解曲线几乎与纤维素粉末相同。 PLA板的生物降解速度比PLA粉末慢。

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