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聚乙烯醇：淀粉：含钠蒙脱石粘土共混物的羧甲基纤维素；力学性能和生物降解行为。

Polyvinyl alcohol:starch:carboxymethyl cellulose containing sodium montmorillonite clay blends; mechanical properties and biodegradation behavior.

作者信息

Taghizadeh Mohammad Taghi, Sabouri Narges, Ghanbarzadeh Babak

机构信息

Department of Physical Chemistry, Faculty of Chemistry, University of Tabriz, P.O. Box 51666-16471 Tabriz, Iran.

出版信息

Springerplus. 2013 Aug 10;2:376. doi: 10.1186/2193-1801-2-376. eCollection 2013.

DOI:10.1186/2193-1801-2-376
PMID:24010034
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3755708/
Abstract

The focuses of this study were to investigate the effect of sodium montmorillonite clay (MMT-Na) content on the physical properties and extent of enzymatic hydrolysis Polyvinyl Alcohol (PVA): Starch (S): Carboxymethyl Cellulose (CMC) nanocomposites using enzyme -amylase. The results of this work have revealed that films with MMT-Na content at 5 wt% exhibited a significantly reduced rate and extent of starch hydrolysis. The results suggest that this may have been attributed to interactions between PVA:S:CMC and MMT-Na that further prevented enzymatic attack on the remaining starch phases within the blend. The total solids that remained after 4320 min were 65.46 wt% (PVA:S:CMC); 67.91 wt% (PVA:S:CMC:1% MMT-Na); 78.43 wt% (PVA:S:CMC:3% MMT-Na); 80.24 wt% (PVA:S:CMC:5% MMT-Na). The rate of glucose production from each nanocomposite substrates were decresed significantly as the MMT-Na percentage increased from 0 to 5% (W/W). At the level of 5% (W/W) MMT-Na, the films showed the lowest rate of glucose production values (18.95 μg/ml h). With the increase of the MMT concentration from 0 to 5%, the UTS increased 5 from 18.36 to 20.38 MPa, however, the strain to break (SB) decreased noticeably from 35.56 to 5.22%.

摘要

本研究的重点是研究蒙脱土钠（MMT-Na）含量对使用α-淀粉酶的聚乙烯醇（PVA）：淀粉（S）：羧甲基纤维素（CMC）纳米复合材料的物理性能和酶促水解程度的影响。这项工作的结果表明，MMT-Na含量为5 wt%的薄膜淀粉水解速率和程度显著降低。结果表明，这可能归因于PVA：S：CMC与MMT-Na之间的相互作用，进一步阻止了酶对共混物中剩余淀粉相的攻击。4320分钟后剩余的总固体含量分别为：65.46 wt%（PVA：S：CMC）；67.91 wt%（PVA：S：CMC：1% MMT-Na）；78.43 wt%（PVA：S：CMC：3% MMT-Na）；80.24 wt%（PVA：S：CMC：5% MMT-Na）。随着MMT-Na百分比从0增加到5%（W/W），每种纳米复合材料底物的葡萄糖生成速率显著降低。在MMT-Na含量为水平5%（W/W）时，薄膜的葡萄糖生成速率最低（18.95 μg/ml h）。随着MMT浓度从0增加到5%，拉伸强度从18.36 MPa增加到20.38 MPa，然而，断裂应变（SB）从35.56%显著降低到至5.22%。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/290e13129b64/40064_2013_460_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/3e48e9ba5a5f/40064_2013_460_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/da7fa4761f66/40064_2013_460_Fig2_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/9e4430868aed/40064_2013_460_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/22350f9404f7/40064_2013_460_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/c97544f79127/40064_2013_460_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/290e13129b64/40064_2013_460_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/3e48e9ba5a5f/40064_2013_460_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/da7fa4761f66/40064_2013_460_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/78d64382252a/40064_2013_460_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/9e4430868aed/40064_2013_460_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/22350f9404f7/40064_2013_460_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/c97544f79127/40064_2013_460_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd1a/3755708/290e13129b64/40064_2013_460_Fig7_HTML.jpg

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