生物降解颗粒的降解性能怎么样 - 常见问题

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生物降解颗粒的降解性能怎么样

生物降解颗粒的降解性能怎么样

来源网址:http://www.rsoau.com 2019-05-15 16:29:31    

  生物降解材料的降解性能,对生物降解材料的降解性能的测试目前还没有制订统一的标准,可采用包括被美国材料试验标准(ASTM)采纳或准备采纳的方法作为标准的方法,通过生物化学和微生物的实验手段来评价的主要方法有下列几种。

  At present, there is no unified standard for testing the degradation performance of biodegradable materials. The methods including those adopted by ASTM or ready to be adopted can be used as standard methods. The main methods for evaluating the degradation performance of biodegradable materials by biochemical and microbial experimental methods are as follows.
  土埋法,土埋法有室外土埋法和室内土埋法两种,其微生物源主要是土壤中的微生物群,经一定时间后,取出试样测定其失重、机械性能变化,或用电子显微镜确定其被土壤中微生物侵袭的状况。
  There are two kinds of burial methods: outdoor burial method and indoor burial method. Their microbial sources are mainly microbial groups in the soil. After a certain period of time, the samples are taken out to determine their weight loss, mechanical properties change, or the microbial invasion status in the soil is determined by electron microscopy.
  优点是能反映出自然环境条件下的生物分解性能;缺点是试验周期长,试验结果因土质不同而不同,重复性差。陪替氏培养器定量法在容器中加入试验样品和营养琼脂,接种微生物进行培养,经一定时间后,分析试样的失重情况以及某些物理变化或化学变化。
  The advantage is that it can reflect the biological decomposition performance under natural environment conditions, while the disadvantage is that the test cycle is long, the test results vary with soil quality, and the repeatability is poor. Quantitative method of Vettel incubator is to add test samples and nutrient agar to the container and inoculate microorganisms for culture. After a certain period of time, the weight loss of the sample and some physical or chemical changes are analyzed.
                             生物降解颗粒
  优点是可快速降解,在短时间内获得试验结果,重复性好,定量性好;缺点是不能反映自然界中的实际情况。酶分析法在容器中加入缓冲液和试验样品,让酶作用一定的时间后,分析试样的失重情况,目测霉菌的生长情况,显微镜分析试样物理性能或化学性能的变化。
  The advantages of this method are fast degradation, good repeatability and good quantification. The disadvantage is that it can not reflect the actual situation in nature. Enzymatic analysis added buffer solution and test sample in the container. After enzymatic action for a certain time, the weight loss of the sample was analyzed, the growth of mould was observed visually, and the changes of physical or chemical properties of the sample were analyzed by microscopy.
  优点是试验周期短,重复性好,定量性好;缺点是不能反映自然界中的实际情况。放射性C14示踪法用C14标记聚合物产品,在微生物的作用下产生CO2,用碱性溶液吸收,用滴定法测出CO2总量,再用放射性衰减率法测定C14的CO2量,用C14的CO2占产生的CO2的百分数表示微生物侵蚀的程度。优点是实验结果可信、明确。生物降解性能的测试可以检测样品生物降解性能的优劣。
  The advantages are short test cycle, good repeatability and good quantification, while the disadvantages are that it can not reflect the actual situation in nature. Radioactive C14 tracer method labels polymer products with C14, produces CO2 under the action of microorganisms, absorbs it with alkaline solution, measures the total amount of CO2 by titration, and then measures the amount of CO2 by radioactivity attenuation rate. The percentage of CO2 produced by C14 represents the degree of microbial erosion. The advantage is that the experimental results are credible and clear. The biodegradability of samples can be tested by the biodegradability test.
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