氧化对热塑性藤黄淀粉理化特性的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-02-11 DOI:10.1002/vjch.202300260

Thi Thu Ha Pham, Thanh Tung Nguyen, V. K. Nguyen, Trung Duc Nguyen, ThuyLinh Pham, Thu Huong Nguyen, Ngoc Anh Pham

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引用次数: 0

摘要

研究了氧化对热塑性芭蕉淀粉理化特性的影响。用不同含量的次氯酸钠（1%、3%和5% w/w）和30 wt%的甘油作为增塑剂，制备了原生淀粉基淀粉（CS）和氧化淀粉基淀粉（OCS）的热塑性淀粉（TPS）。对原生淀粉基 TPS（NTPS）和氧化淀粉基 TPS（OTPS）样品进行了理化、形态、热和机械性能测试。在 OCS 中，羧基和羰基的含量随着氧化剂含量的增加而增加，这有助于 CS 塑化效率的提高。扫描电镜图像显示，OTPS 样品的形态比 NTPS 更光滑。傅立叶变换红外光谱表明，OTPS 中的 OCS 与增塑剂之间的相互作用更强。XRD 证实淀粉的结晶类型发生了变化，结晶度的降低是由于氧化和增塑的双重作用。羰基和羧基含量对 OTPS 的 Tg 和 ΔHg 有很大影响。OCS 中羰基和羧基含量越高，Tg 和 ΔHg 越低，塑化越容易。由于 OTPS 的塑化效果更好，其机械性能和热稳定性也得到了提高。

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Effect of oxidation on physicochemical characteristics of thermoplastic canna starch

The effects of oxidation on physicochemical characteristics of thermoplastic canna starch were investigated. Thermoplastic starch (TPS) of native canna starch (CS) and oxidized canna starch (OCS) were prepared with different contents of sodium hypochlorite (1%, 3%, and 5% w/w) and 30 wt% of glycerol as plasticizer. Native starch‐based TPS (NTPS) and oxidized starch‐based TPS (OTPS) samples were tested for physicochemical, morphological, thermal, and mechanical properties. In OCS, the content of carboxyl and carbonyl groups increased with the increase in the content of oxidant, and this contributed to the improvement in CS plasticization efficiency. SEM images indicated that the morphology of OTPS samples was smoother than that of NTPS. The stronger interaction between OCS and plasticizer in OTPS was indicated by FTIR spectra. XRD confirmed that the crystallite type of starch was changed and their decrease in crystallinity is attributed to effects of both oxidation and plasticization. The carbonyl and carboxyl content had a large impact on Tg and ΔHg of OTPS. The higher content of these groups in OCS leads to the lower Tg and the lower ΔHg, which could make the plasticization easier. Due to the better plasticization in OTPS, their mechanical properties and thermal stability were enhanced.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.