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首页> 外文期刊>Journal of Applied Polymer Science >Biodegradation of Montmorillonite Filled Oxo-Biodegradable Polyethylene
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Biodegradation of Montmorillonite Filled Oxo-Biodegradable Polyethylene

机译：蒙脱石填充的可氧化生物降解聚乙烯的生物降解

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Oxo-biodegradation of polyethylene has been well studied with different pro-oxidants and it has been shown that pro-oxidants have limited role in the oxidation of polyethylene and do not have any role in microbial growth. However, in few recent studies, montmorillonite clay has been reported to promote the growth of microbes by keeping the pH of the environment at levels conducive to growth. In an attempt to improve the overall oxo-biodegradation of polyethylene, montmorillonite nanoclay has been used in this study along with a prooxidant. Film samples of oxo-biodegradable polyethylene (OPE) and oxo-biodegradable polyethylene nanocomposite (OPENac) were subjected to abiotic oxidation followed by microbial degradation using microorganism Pseudomonas aeruginosa. The progress of degradation was followed by monitoring the chemical changes of the samples using high-temperature gel permeation chromatography (GPC) and infrared spectroscopy (FTIR). The growth of bacteria on the surface of the polymer was monitored using environmental scanning electron microscopy. GPC data and FTIR results have shown that the abiotic oxidation of polyethylene is influenced significantly by the pro-oxidant but not by nanoclay. But, the changes in molecular weight distribution and FTIR spectra for the biodegraded samples indicate that the growth rate of P. aeruginosa on OPENac is significantly greater than that on OPE. It indicates that nanoclay, by providing a favourable environment, helps in the growth of the microorganism and its utilisation of the polymer surface and the bulk of the polymer volume.
机译：聚乙烯的氧化生物降解已经用不同的助氧化剂进行了充分的研究，并且已经表明，助氧化剂在聚乙烯的氧化中作用有限，对微生物的生长没有任何作用。然而，在最近的一些研究中，据报道蒙脱石粘土通过将环境的pH值保持在有利于生长的水平来促进微生物的生长。为了改善聚乙烯的整体氧化-生物降解作用，蒙脱土纳米粘土与助氧化剂一起用于本研究中。氧可生物降解的聚乙烯（OPE）和氧可生物降解的聚乙烯纳米复合材料（OPENac）的薄膜样品经过非生物氧化，然后使用铜绿假单胞菌进行了微生物降解。通过使用高温凝胶渗透色谱（GPC）和红外光谱（FTIR）监控样品的化学变化来跟踪降解的进程。使用环境扫描电子显微镜监测细菌在聚合物表面上的生长。 GPC数据和FTIR结果表明，聚乙烯的非生物氧化受到助氧化剂的影响很大，而不受纳米粘土的影响。但是，生物降解样品的分子量分布和FTIR谱的变化表明，铜绿假单胞菌在OPENac上的生长速率明显大于在OPE上的生长速率。这表明纳米粘土通过提供有利的环境，有助于微生物的生长及其对聚合物表面和聚合物体积的利用。

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