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Thermal behavior of complex model with the cellulose II and amorphous chain

Wuhan Textile and Apparel Digital Engineering, Technology Research Center Wuhan Textile University, Wuhan, Hubei 430073, P. R. China

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Xuewei Jiang

http://orcid.org/0000-0002-2115-7571

Wuhan Textile and Apparel Digital Engineering, Technology Research Center Wuhan Textile University, Wuhan, Hubei 430073, P. R. China

E-mail Address: xwjiang@wtu.edu.cn

Corresponding author.

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Huhe Wu

Wuhan Textile and Apparel Digital Engineering, Technology Research Center Wuhan Textile University, Wuhan, Hubei 430073, P. R. China

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, and

Lu Zheng

Wuhan Textile and Apparel Digital Engineering, Technology Research Center Wuhan Textile University, Wuhan, Hubei 430073, P. R. China

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https://doi.org/10.1142/S0219633620400040Cited by:8 (Source: Crossref)

This article is part of the issue:

Special Issue on Novel Methods in Computational Chemistry and their Applications to Biological Problems: Part 1
Guest Editor: Lin Li

Abstract

To investigate the thermal behavior of complex model with amorphous region and crystallization region of cellulose II, the structures and properties of cellulose II, amorphous chain and their combined models were studied by molecular dynamics simulation. The results showed that the amorphous chain is more susceptible to temperature than the cellulose II. It can form anti-parallel structure similar to cellulose II at high temperature. In the complex model, one end of the amorphous chain is fixed to form hydrogen bonds with the cellulose II, and the other end is not. At 300K, the free part of amorphous chain is approximately perpendicular to the axial direction of the cellulose II. When the temperature increases, the free part of amorphous chain adheres to the surface of cellulose II. The free part of amorphous chain did not form hydrogen bond with the cellulose II. The formation of amorphous chain and surface of the cellulose II is a zipper process at 450K. Furthermore, water molecules penetrate into the inter-space of the amorphous and crystalline regions. The probability of hydrogen bonds between water molecules and the complex model was less than 8.21% which explains why cellulose is insoluble in water. These conclusions provide a guiding significance for the dissolution mechanism of cellulose.

Keywords:

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