玉米淀粉/甘油/蒙脱土纳米复合材料的酶解和土埋降解

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2020-02-01 DOI:10.1177/2041247920952649

H. Ostadi, Saeed Gilak Hakimabadi, F. Nabavi, M. Vossoughi, I. Alemzadeh

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引用次数: 10

摘要

在这项研究中，研究了甘油(10%、20%和30% wt%)和蒙脱土钠(Na-MMT)(0%、2.5%和5%)含量对玉米淀粉聚合物降解的影响。采用一种改进的方法将玉米淀粉溶液浇铸成膜，以增强纳米粘土的分布。生物可降解性研究是通过使用原始和肥沃土壤的酶和掩埋试验进行的。样品在原始土壤中的生物降解性更快，所有样品在6个月内完全降解。纳米颗粒在降解过程中对质量降低的影响比甘油更明显。在所有甘油浓度下，Na-MMT的加入都增加了抗拉强度。红外光谱(FTIR)测试表明，降解性与淀粉α-1,4键先浸出后裂解有关，说明土壤微生物产生的α-淀粉酶的作用。土壤掩埋试验结果与酶降解结果吻合良好。在最佳甘油/粘土比下，d-间距和力学性能最大。

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Enzymatic and soil burial degradation of corn starch/glycerol/sodium montmorillonite nanocomposites

In this study, effects of glycerol (10, 20, and 30 wt%) and Sodium Montmorillonite (Na-MMT) (0%, 2.5%, and 5%) contents on the degradation of corn starch polymers were investigated. Films were prepared by casting corn starch solution using a modified method to enhance the nanoclay distribution. Biodegradability studies were performed by enzymatic and burial tests using pristine and enriched soils. The biodegradability of samples in pristine soil was faster, and all samples were fully degraded in 6 months. The effect of nanoparticles on the mass reduction in degradation was more pronounced than that of glycerol. In all glycerol concentrations, Na-MMT addition increased tensile strength. FTIR tests showed that degradability was related to glycerol leaching at first and then cleaving of α-1,4 bonds of starch, indicating the action of α-amylase produced by soil microorganisms. Good agreement between soil burial tests and enzymatic degradation was observed. An optimum Glycerol/Clay ratio was observed at which d-spacing and mechanical properties were maximum.

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.