Title
Influence of carboxymethylated holocellulose and PAE binary system on paper properties
Authors
WEITAO HE MENG WANG XIANLIANG SONG and QIANG ZHAO

Received March 29, 2015
Published Volume 51 Issue 3-4 March-April
Keywords carboxymethylated, holocellulose, PAE, wet-strengthening agent, paper properties

Abstract
In this paper, corncob, as raw material, was delignified with sodium chlorite. The residue holocellulose was modified with sodium chloroacetate to prepare paper strengthening agents. The influence of carboxymethylated holocellulose (CMH), polyamide-epichlorohydrin (PAE), cationic starch (CS) and their mixture on paper properties was evaluated. The results showed that PAE, CMH and CS could significantly increase the tensile index, burst index and folding endurance of paper. After adding 0.6% PAE, the dry tensile index, burst index and folding endurance of paper increased as the dosage of CMH changed from 0.3% to 1.2%. Compared with adding PAE separately, dry tensile index, wet tensile index, and burst index of paper increased by 15.03%, 43.22%, and 11.38%, respectively, when the dosage of CMH was 0.6%. The binary system of CMH and CS had similar results. FTIR-ATR analysis of the paper surface indicated that modification with all of PAE, cationic starch, the binary systems of CMH/PAE and CMH/CS could increase C-O bond intensity, which drew the fibers closer to each other in the handsheets. This was also proved by the results of SEM analyses.