Insight to Cellulose–Polycarboxylic Acid Intermolecular Interactions Using TG and DSC Thermal Analysis Tools

IF 1 4区化学 Q4 POLYMER SCIENCE

Polymer Science, Series A Pub Date : 2023-07-03 DOI:10.1134/S0965545X23700773

Ananda S. Amarasekara, Yen Maroney Lawrence, Victor C. Nwankwo, Nabila Shamim

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Abstract

Interactions between polycarboxylic acids and cellulose was evaluated by using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) profiles of their mixtures. TGA, DSC of cellulose and acids were recorded as baseline data and peak shifts were calculated by subtracting the peak maximum values of cellulose from that of cellulose-polycarboxylic acid mixtures. In TGA, DL-tartaric and citric acid with cellulose mixtures showed the largest positive shifts of +58 and +23°C in the derivative-TGA second peak. In addition, DL-tartaric and citric acid showed the smallest cellulose DTGA peak 1 area/peak 2 area ratios of 0.50 and 1.58 respectively. In DSC the largest cellulose dehydration peak shifts of +39 and +21°C were recorded for DL-tartaric and citric acids. In acids studied, polycarboxylic acids with one or more hydroxyl groups are more strongly interacting with cellulose in the solid state. The strong interactions of these acids are probably due to their ability to wrap round the polysaccharide chains forming multiple hydrogen bonding between –COOH and –OH of acid with –OH groups of cellulose.

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洞察纤维素-聚羧酸分子间相互作用使用TG和DSC热分析工具

摘要采用热重分析(TGA)和差示扫描量热法(DSC)分析了多羧酸与纤维素的相互作用。记录纤维素和酸的TGA、DSC作为基线数据，并通过从纤维素-聚羧酸混合物的峰值中减去纤维素的峰值值来计算峰移。在TGA中，dl -酒石酸和柠檬酸与纤维素的混合物在导数-TGA第二峰的+58°C和+23°C的正位移最大。dl -酒石酸和柠檬酸的DTGA峰1面积/峰2面积比最小，分别为0.50和1.58。在DSC中，dl -酒石酸和柠檬酸的最大脱水峰移分别为+39和+21°C。在所研究的酸中，具有一个或多个羟基的多羧酸在固体状态下与纤维素的相互作用更强。这些酸的强相互作用可能是由于它们能够包裹多糖链，在酸的-COOH和-OH与纤维素的-OH基团之间形成多个氢键。

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来源期刊

Polymer Science, Series A 化学-高分子科学

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Polymer Science, Series A is a journal published in collaboration with the Russian Academy of Sciences. Series A includes experimental and theoretical papers and reviews devoted to physicochemical studies of the structure and properties of polymers (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed. Online submission via Internet to the Series A, B, and C is available at http://polymsci.ru.