title: Carboxymethylated glucomannan as paper strengthening agent.
abstract: Strength additives play an important role in allowing the papermaking industry to achieve its objectives. In this study, a new kind of paper strengthening agent based on glucomannan was developed by treating it with sodium chloroacetate under alkaline conditions, and the effects on paper properties were evaluated. Results indicated that carboxymethylated glucomannan could significantly improve the paper properties. Compared to the untreated paper, the density, burst index, tensile index, and folding endurance were increased by 15.2%, 22.8%, 34.6%, 179.0%, respectively, when 0.9% carboxymethylated glucomannan was used. Polyamide-epichlorohydrin (PAE) was used to improve the wet strength of the paper. When 0.6% PAE and 0.6% carboxymethylated glucomannan were used, the burst index, dry tensile index, wet tensile index of paper were increased by 14.1%, 25%, 34.3%, respectively, as compared to that of the control, while the folding endurance decreased slightly. In addition, dry tensile index and wet tensile index were increased with increasing the carboxymethylation time of glucomannan. The results demonstrated that PAE and carboxymethylated glucomannan displayed a synergistic effect. SEM analysis illustrated that paper strengthening agent could increase the combination of fibers in paper.
authors: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
authors: Meng
authors: M
authors: Wang
authors: MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors: Weitao
authors: W
authors: He
authors: MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.
authors: Shun
authors: S
authors: Wang
authors: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China. Electronic address: sxlswd@163.com.
authors: Xianliang
authors: X
authors: Song
mesh_terms: D000085:Acetates / Q000737:chemistry; D000468:Alkalies / Q000737:chemistry; D004811:Epichlorohydrin / Q000031:analogs & derivatives / Q000737:chemistry*; D008351:Mannans / Q000737:chemistry*; D009757:Nylons / Q000737:chemistry; D010209:Paper
chemical_list: D000085:Acetates; D000468:Alkalies; D008351:Mannans; D009757:Nylons; D004811:Epichlorohydrin; C022901:(1-6)-alpha-glucomannan; C006972:chloroacetic acid
keywords: Carboxymethylation treatment; Glucomannan; Paper properties; Paper strengthening agent