Preparation and Characterization of Softwood Kraft Lignin Copolymers as a Paper Strength Additive

• DOI: 10.3390/polym10070743
• Publication Date: 2018-07-05T14:52:44Z
• Authors: Zhongming Liu; Dingding Xu; Lei Xu; Fangong Kong; Shoujuan Wang; Guihua Yang
• Keywords: Softwood; Ammonium chloride

Softwood kraft lignin is a renewable type of woody material that can be converted to value-added products, for example, as paper strength additive in the industry. In this study, monomers methacryloxyethyltrimethyl ammonium chloride (DMC), acrylic acid (AA), and acrylamide (AM) were grafted on softwood (SKL) prepare three different SKL copolymers. Fourier-transform infrared, proton nuclear magnetic resonance, charge density, elemental, molecular weight analyses confirmed successfully onto SKL. The grafting rates SKL-DMC, SKL-AA, SKL-AM copolymers 80.35%, 82.70%, 79.48%, respectively. application enhancing physical properties was studied. results indicated at 2 wt % dosage copolymers, increase maximum.