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首页> 外文期刊>Fibres & textiles in Eastern Europe >Chemical Modification of Starch-Protein Material Performed in Order to Obtain a Half Product for Thermoplastic Processing
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Chemical Modification of Starch-Protein Material Performed in Order to Obtain a Half Product for Thermoplastic Processing

机译：进行淀粉蛋白材料的化学修饰以获得半成品以进行热塑性加工

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摘要

This article presents the results of tests which were carried out on a starch-protein biomaterial produced from wheat. The research was performed in order to assess optimal conditions for performing the chemical modification (acetylation and oxidation reactions) and its influence on the physico-chemical properties of the new biomaterial. Modifying agents were acetic acid anhydride with the presence of NaOH and K2CO3 activators as well as hydrogen peroxide, whose effects were catalysed with Cu2+ ions. Modified polymers with a degrees of substitution from 0.38 to 2.45 and oxidation from 1.0 to 35% were obtained in the process. The polymers obtained were characterized with various levels of starch degradation, minimal when the acetylation reaction activated with the K2CO3 method was used, moderate to high when the acetylation reaction was activated by NaOH, and maximal starch degradation was observed when oxidation was catalysed with Cu2+ ions. The modified polymers showed minor thermal granulation abilities and did not achieve thermoplastic abilities. Evaluation of the modification effects was carried out with absorption spectroscopy in infra-red radiation with the Fourier transformation (FTIR) technique, DSC, scanning electron microscopy and determining the boundary viscosity value.
机译：本文介绍了对小麦生产的淀粉蛋白生物材料进行测试的结果。进行这项研究是为了评估进行化学修饰（乙酰化和氧化反应）的最佳条件及其对新生物材料的理化性质的影响。改性剂是存在NaOH和K2CO3活化剂以及过氧化氢的乙酸酐，其作用是由Cu2 +离子催化的。在该方法中获得了具有0.38至2.45的取代度和1.0至35％的氧化度的改性聚合物。所获得的聚合物具有各种程度的淀粉降解特征，使用K2CO3方法活化的乙酰化反应时，淀粉的降解程度最低；当使用NaOH活化乙酰化反应时，其降解程度中等至高；当用Cu2 +离子催化氧化时，淀粉降解最大。 。改性的聚合物显示出较小的热粒化能力，并且没有达到热塑性的能力。使用傅立叶变换（FTIR）技术，DSC，扫描电子显微镜，通过吸收光谱法在红外辐射中对改性效果进行评估，并确定边界粘度值。

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