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Synthesis and Characteristic of Xylan-grafted-polyacrylamide and Application for Improving Pulp Properties

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State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
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Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Materials 2017, 10(8), 971; https://doi.org/10.3390/ma10080971
Received: 17 July 2017 / Revised: 17 August 2017 / Accepted: 17 August 2017 / Published: 20 August 2017
(This article belongs to the Section Manufacturing Processes and Systems)
Recently, more attentions have been focused on the exploration of hemicelluloses in the paper industry. In this work, xylan-grafted-polyacrylamide (xylan-g-PAM) biopolymers were synthesized by the graft copolymerization of xylan with acrylamide, and their interaction with fibers was also investigated to improve waste newspaper pulp properties with or without cationic fiber fines. The influences of synthesis conditions were studied on the grafting ratio and the grafting efficiency of biopolymers. Prepared biopolymers were characterized by FTIR, 13C NMR, TGA and rheology. It was found that the grafting of PAM on xylan was conductive to improve xylan properties, such as the solubility in water, rheological features, and thermal stability, and the maximum grafting ratio was achieved to 14.7%. Moreover, xylan-g-PAM could obviously enhance the mechanical properties of waste paper pulps. Xylan-g-PAM also played the dominant role in increasing the strength of paper in the combination with prepared cationic fine fibers. When the amounts of xylan-g-PAM and cationic fiber fines were 1.0 wt % and 0.5 wt %, the mechanical properties such as the tensile index was increased by 49.09%, tear index was increased by 36.54%, and the burst index was increased by 20.67%, when compared with the control handsheets. Therefore, xylan-g-PAM as the new biopolymer could be promising in the application of strength agents for the paper industry as well as cationic fiber fines. View Full-Text
Keywords: xylan; the graft copolymerization; structure; characteristics; paper properties xylan; the graft copolymerization; structure; characteristics; paper properties
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Xu, G.-B.; Kong, W.-Q.; Liu, C.-F.; Sun, R.-C.; Ren, J.-L. Synthesis and Characteristic of Xylan-grafted-polyacrylamide and Application for Improving Pulp Properties. Materials 2017, 10, 971.

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