Preparation and application of cationic cellulose fibers modified by in situ grafting of cationic PVA

被引:34
|
作者
Sang, Yizhou [1 ,2 ]
Xiao, Huining [1 ,2 ,3 ]
机构
[1] Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada
[2] Univ New Brunswick, Limerick Pulp & Paper Ctr, Fredericton, NB E3B 5A3, Canada
[3] S China Univ Technol, State Key Lab Pulp & Paper Eng, Guangzhou, Guangdong, Peoples R China
基金
加拿大自然科学与工程研究理事会;
关键词
Cationic cellulose fiber; Ceric ammonium nitrate; In situ graft copolymerization; FT-IR; SEM; Optical microscope; Filler distribution; SULFITE PULP; FILLER; PAPERMAKING; PAPER; CLAY; COPOLYMERIZATION; FLOCCULATION; RETENTION; POLYMERIZATION; IMPROVEMENT;
D O I
10.1016/j.colsurfa.2008.10.053
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Rendering the cellulose fiber cationic via in situ graft copolymerization has been regarded as one of the effective approaches to improve the filler retention and distribution. In this work, cationic cellulose fibers were prepared by in situ copolymerization of vinyl acetate (VAc) and diallyldimethylammonium chloride (DADMAC) onto softwood sulphite pulp fibers using ceric ammonium nitrate (CAN) as a free radical initiator, followed by alkaline hydrolysis. Effects of various process parameters were systematically investigated, such as temperature, reaction time, initiator concentration, etc. Fourier transform infrared spectroscopy (FT-IR) was performed to confirm the existence of the grafted copolymers on the surface of sulphite pulps. The charge density of modified fibers was determined via back titration using a Particle Charge Detector MUtek PCD 03. The difference between grafted fibers and virgin fibers was also revealed by the SEM observation. The resulting cationic pulps led to significant improvement of filler retention and distribution. Further improvement in filler retention was achieved by the synergy between cationic pulps and a conventional cationic polymer. In addition, the improved distribution of filler along fiber surfaces achieved by the addition of cationic pulp was demonstrated by both optical microscope and SEM observation. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:121 / 127
页数:7
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