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Polymers 2018, 10(3), 290; https://doi.org/10.3390/polym10030290

Correlation between Solubility Parameters and Properties of Alkali Lignin/PVA Composites

Material Science and Engineering College, Key Laboratory of Bio-Based Material Science and Technology Ministry of Education, Northeast Forestry University, Harbin 150040, China
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Received: 20 January 2018 / Revised: 21 February 2018 / Accepted: 6 March 2018 / Published: 8 March 2018
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Abstract

Although lignin blending with thermoplastic polymers has been widely studied, the usefulness of the lignin–polymer composites is limited by the poor compatibility of the two components. In the present study, alkali lignin/PVA composite membranes were prepared by incorporating 10%, 15%, 20% and 25% alkali lignin into the composites. The thermodynamic parameters of the composites were measured using inverse gas chromatography (IGC). Composite membranes with 10%, 15%, 20%, and 25% alkali lignin had solubility parameters of 17.51, 18.70, 16.64 and 16.38 (J/cm3)0.5, respectively, indicating that the solubility parameter firstly increased, and then decreased, with increasing proportions of alkali lignin. When the alkali lignin content was 15%, the composites had the largest solubility parameters. The composite membrane with an alkali lignin content of 15% had a tensile strength of 18.86 MPa and a hydrophilic contact angle of 89°. We have shown that the solubility parameters of blends were related to mechanical and hydrophilic properties of the composites and the relationships have been verified experimentally and theoretically. View Full-Text
Keywords: alkali lignin; composite membrane; inverse gas chromatography; the solubility parameter; preparation of composites; performance of composites alkali lignin; composite membrane; inverse gas chromatography; the solubility parameter; preparation of composites; performance of composites
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhao, G.; Ni, H.; Ren, S.; Fang, G. Correlation between Solubility Parameters and Properties of Alkali Lignin/PVA Composites. Polymers 2018, 10, 290.

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