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首页> 外文期刊>Environmental engineering and management journal >BIODEGRADATION BEHAVIOR OF POLY(VINYL ALCOHOL) - WOOD COMPOSITES
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BIODEGRADATION BEHAVIOR OF POLY(VINYL ALCOHOL) - WOOD COMPOSITES

机译：聚（乙烯醇） - 木材复合材料的生物降解行为

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摘要

A study on the biodegradability of several formulations based on poly[vinyl alcohol] (PVA) and wood flour has been carried out. Basically, all formulations are based on PVA and wood flour, and the influence of starch, glycerol and/or polyvinyl chloride (PVC) incorporated in some of them was investigated. Biodegradation was performed by incubation of the composites with a selected Aspergillus niger strain able to act as an polymer biodegrading agent. The composites biodegradation was evaluated by using SEM observations, FTIR and TGA analysis before and after incubation with microorganism. The surface morphology obtained from SEM showed that fungal strain colonizes the polymer surface of samples VACW (supplemented with glycerol and PVC), and especially of samples VAA (supplemented with glycerol and starch), developing dense hyphae networks and conidia accumulations. The microbial attack on composites with more than two components has led to the increase of the peak around 1740 cm"1, due to oxidation of PVA hydroxyl groups to carbonyl groups, proving in this way the beginning of the biodegradation process. TGA analysis demonstrated that the number of thermal decomposition steps depends on composition, from three steps for VA samples (only with the two basic components, PVA and wood flour), up to four steps for VAW samples (supplemented with glycerol) and VAA samples, and even five steps for VACW. The experiments confirmed the biodegradation process of the VAA and VACW samples that are more accessible to the fungal activity.
机译：已经进行了基于聚[乙烯醇]（PVA）和木粉的几种制剂的生物降解性研究。基本上，所有制剂都基于PVA和木粉，研究了淀粉，甘油和/或聚氯乙烯（PVC）的影响，其中一些含有它们的一些物质。通过将复合材料孵育与能够作为聚合物生物降解剂的所选曲霉菌菌株进行生物降解。通过在与微生物孵育之前和之后使用SEM观察，FTIR和TGA分析来评估复合材料生物降解。从SEM获得的表面形态表明，真菌菌株将样品的聚合物表面进行沉淀，样品VAA（补充有甘油和PVC），特别是样品VAA（补充甘油和淀粉），显影致密的菌丝网络和分枝瘤积累。由于PVA羟基氧化到羰基的氧化物，具有两种以上组分的复合材料的微生物攻击导致峰值增加约1740厘米“1，以这种方式在这种方式开始生物降解过程的开始。TGA分析证明了这一点热分解步骤的数量取决于组合物，从VA样品的三个步骤（仅用两种碱性组分，PVA和木粉），最多四个用于VAW样品（补充甘油）和VAA样品的四个步骤，甚至五个步骤用于扫地。实验证实了VAA和真菌活性更易于途径的生物降解过程。

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    Luiza Jecu; Iuliana Raut; Elena Grosu; Mariana Calin; Violeta Purcar; Marius Ghiurea; Mihaela Badea-Doni; Florin Oancea; Cristian-Andi Nicolae;

  • 作者单位

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    SC ICPE Bistrita SA 7 Parcului Street Bistrita Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

    National Research and Development Institute for Chemistry and Petrochemistry - ICECHIM Spl. Independentei 202 Bucharest Romania;

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  • 正文语种 eng
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  • 关键词

    Aspergillus niger; polymer biodegradation; polyvinyl alcohol)-wood composites;

    机译：曲霉;聚合物生物降解;聚乙烯醇） - 木材复合材料;

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