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Incorporation of CNF with Different Charge Property into PVP Hydrogel and Its Characteristics

机译：将CNF与不同的电荷特性掺入PVP水凝胶及其特性

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摘要

Cellulose nanofibril (CNF)-added polyvinylpyrrolidone (PVP) hydrogels were prepared using different types of CNFs and their properties were investigated. CNFs with different morphology and surface charge properties were prepared through quaternization and carboxymethylation pretreatments. The quaternized CNF exhibited the narrow and uniform width, and higher viscoelastic property compared to untreated and carboxymethylated CNF. When CNF was incorporated to PVP hydrogel, gel contents of all hydrogels were similar, irrespective of CNF addition quantity or CNF type. However, the absorptivity of the hydrogels in a swelling medium increased by adding CNF. In particular, the quaternized CNF-added PVP hydrogel exhibited the highest swelling ability. Unlike that of hydrogels with untreated and carboxymethylated CNFs, the storage modulus of PVP hydrogels after swelling significantly increased with an increase in the content of the quaternized CNF. These indicate that a PVP hydrogel with a high absorptivity and storage modulus can be prepared by incorporating the proper type of CNF.
机译：使用不同类型的CNF制备纤维素纳米纤维（CNF）添加的聚乙烯吡咯烷酮（PVP）水凝胶，并研究其性质。通过季铵化和羧甲基化预处理制备具有不同形态和表面电荷性质的CNF。与未处理和羧甲基化的CNF相比，季铵化CNF表现出窄且均匀的宽度和较高的粘弹性性质。当CNF被掺入PVP水凝胶时，无论CNF添加量还是CNF型，所有水凝胶的凝胶含量都相似。然而，通过添加CNF来增加溶胀介质中的水凝胶的吸收率。特别是，季铵化CNF添加的PVP水凝胶表现出最高的溶胀能力。与具有未处理和羧甲基化的CNFS的水凝胶不同，PVP水凝胶的储存量模随季铵化CNF含量的增加而显着增加。这些表明，通过掺入适当的CNF可以制备具有高吸收性和储存模量的PVP水凝胶。

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