title: A process for enhancing the accessibility and reactivity of hardwood kraft-based dissolving pulp for viscose rayon production by cellulase treatment.
abstract: The commercial pre-hydrolysis kraft-based dissolving pulp production process can be a typical example for the demonstration/implementation of the integrated forest biorefinery concept. In this study, the concept of cellulase treatment of this dissolving pulp for enhancement of accessibility/reactivity in terms of viscose rayon production was demonstrated. The cellulase treatment resulted in the formation of additional openings/surface areas in the fiber structure via the possible action of "etching". As a result, the pore volume of pulp fibers increased, which led to the increase in the accessibility to xanthation, and thus Fock reactivity. Results showed that the cellulase treatment was effective in increasing the Fock reactivity, at a cellulase dosage of 2u/g (based on the dry weight of pulp), the Fock reactivity increased from 47.67% to 79.9%. The adoption of cellulase treatment to hardwood kraft-based dissolving pulp can provide an efficient approach for enhancing its performance in the commercial viscose-rayon process.
authors.affiliation: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China; Limerick Pulp and Paper Centre and Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada. Electronic address: miaoqingxian@163.com.
authors.forename: Qingxian
authors.initials: Q
authors.lastname: Miao
authors.affiliation: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Chen
authors.affiliation: College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
authors.forename: Liulian
authors.initials: L
authors.lastname: Huang
authors.affiliation: Limerick Pulp and Paper Centre and Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; China National Pulp and Paper Research Institute, Beijing 100102, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Tian
authors.affiliation: Limerick Pulp and Paper Centre and Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
authors.forename: Linqiang
authors.initials: L
authors.lastname: Zheng
authors.affiliation: Limerick Pulp and Paper Centre and Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada. Electronic address: yonghao@unb.ca.
authors.forename: Yonghao
authors.initials: Y
authors.lastname: Ni
mesh_terms: D000468:Alkalies / Q000494:pharmacology; D001709:Biotechnology / Q000379:methods*; D002480:Cellulase / Q000494:pharmacology*; D002482:Cellulose / Q000138:chemical synthesis*; D008970:Molecular Weight; D010209:Paper; D016062:Porosity / Q000187:drug effects; D012995:Solubility / Q000187:drug effects; D014783:Viscosity / Q000187:drug effects; D014934:Wood / Q000737:chemistry* / Q000187:drug effects
chemical_list: D000468:Alkalies; D002482:Cellulose; C012024:rayon, purified; D002480:Cellulase
keywords: Accessibility; Cellulase; Enzyme; Hardwood kraft-based dissolving pulp; Reactivity