Effect of Loblolly Pine (Pinus taeda L.) Hemicellulose Structure on the Properties of Hemicellulose-Polyvinyl Alcohol Composite Film

Autor:	Huaizhi Pan, Biao Zheng, Hui Yang, Yingying Guan, Liuyang Zhang, Xiaoli Xu, Aimin Wu, Huiling Li
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	loblolly pine hemicellulose graded ethanol precipitation hemicellulose-polyvinyl alcohol composite film Chemistry (miscellaneous) Organic Chemistry Drug Discovery Molecular Medicine Pharmaceutical Science Physical and Theoretical Chemistry Analytical Chemistry
Zdroj:	Molecules; Volume 28; Issue 1; Pages: 46
ISSN:	1420-3049
DOI:	10.3390/molecules28010046
Popis:	Hemicellulose is the second most abundant natural polysaccharide and a promising feedstock for biomaterial synthesis. In the present study, the hemicellulose of loblolly pine was obtained by the alkali extraction-graded ethanol precipitation technique, and the hemicellulose-polyvinyl alcohol (hemicellulose-PVA) composite film was prepared by film casting from water. Results showed that hemicellulose with a low degree of substitution is prone to self-aggregation during film formation, while hemicellulose with high branching has better compatibility with PVA and is easier to form a homogeneous composite film. In addition, the higher molecular weight of hemicellulose facilitates the preparation of hemicellulose-PVA composite film with better mechanical properties. More residual lignin in hemicellulose results in the better UV shielding ability of the composite film. This study provides essential support for the efficient and rational utilization of hemicellulose.
Databáze:	OpenAIRE
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