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Mechanism of Bonding Reactive Dyes with Copolymer (Chloromethyl)Oxirane-1H-imidazole Cationised Cellulose
Materials ( IF 3.1 ) Pub Date : 2022-07-02 , DOI: 10.3390/ma15134664
Stanisław Pruś 1 , Piotr Kulpiński 1 , Edyta Matyjas-Zgondek 1 , Krzysztof Wojciechowski 2
Affiliation  

Introducing the cellulose chain cationic groups in the modification process completely changes the charge on the cotton surface from negative to partially or totally positive. That allows the electrostatic attraction and simultaneous exhaustion and fixation of reactive dyes. This reaction can be carried out without salt and alkali at room temperature. Similarly, the reaction between reactive dye and an alone copolymer ([IME]+Cl) with TLC chromatography was confirmed. The analysis with the use of particle optimisation with MM+ molecular mechanics and quantum-chemical calculations PM3 by the method of all valence orbitals confirmed the experimental results of the high activity of the nucleophile formed on the hydroxyl group in the chain of a modifier. It was found and experimentally confirmed that the reactive dyes during the dyeing process of the cotton cationised with copolymer (chloromethyl)oxirane -1H-imidazole ([IME]+Cl) create covalent bonds due to a reaction with the hydroxyl group located in the modification agent instead of with the hydroxyl group in the glucopiranose ring. Although the dyeing takes place in very mild conditions, a high degree of setting is achieved, comparable to conventional methods.

中文翻译:

活性染料与共聚物(氯甲基)环氧乙烷-1H-咪唑阳离子纤维素的结合机理

在改性过程中引入纤维素链阳离子基团,使棉花表面的电荷由负电荷完全变为部分或全部正电荷。这允许静电吸引和同时耗尽和固定活性染料。该反应可在室温下无盐无碱地进行。类似地,活性染料与单独的共聚物([IME] + Cl -) 用 TLC 色谱法证实。使用 MM+ 分子力学的粒子优化分析和通过所有价轨道方法的量子化学计算 PM3 的分析证实了在改性剂链中的羟基上形成的亲核试剂的高活性的实验结果。发现并通过实验证实,在棉花染色过程中,用共聚物(氯甲基)环氧乙烷-1H-咪唑([IME] + Cl -) 由于与位于改性剂中的羟基而不是与吡喃葡萄糖环中的羟基反应而产生共价键。尽管染色是在非常温和的条件下进行的,但与传统方法相比,它的定型度很高。
更新日期:2022-07-03
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