Preparation and Characterization of Lignin/PVA Composite Fiber Crosslinked with Bio Aldehyde for Removal of Hexavalent Chromium
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초록
내용
Recently, as interest in biopolymers has increased as a solution to resource depletion and environmental pollution, the possibility of utilizing lignin has emerged in the polymer industry, which has the advantage of being eco-friendly, competitive in price, and rich in carbon content. However, the lack of fabrication technology and low structural stability due to lignin's molecular complexity hinder industrial materialization. In this study, the bio-aldehyde crosslinked lignin/PVA composite fibrous adsorbent was fabricated to remove hexavalent chromium. Through the GPC, FTIR, 1H-NMR physicochemical properties of bio-aldehyde were examined. The lignin/PVA composite fiber's characteristics according to the lignin/PVA composition were evaluated as the maximum elongation and spinning property. As a result, lignin/PVA composite fiber with improved structural stability was successfully prepared, and the removal efficiency of hexavalent chromium increased as the content of lignin increased.