Optimization of the process variables for treating cellulose fiber with NaOH/urea aqueous solution for improved water retention value and paper strength
Source abstract
Abstract
Abstract Cellulose fibers swell significantly in NaOH/urea solutions, and swelling increases with a decrease in temperature and an addition of urea. The combined effects of the factors of a pretreatment procedure (sodium hydroxide concentration, urea concentration, temperature, and time) and post-treatment conditions (medium, stirring speed, and time) of preparing fibers on the properties of pulp and the resulting paper sheets were investigated and optimized using single factor experiments. The optimum sodium hydroxide concentration (1 %), urea concentration (8 %), precooling temperature 0 °C, pretreatment time (12 h), post-treatment medium (7 % {({\mathrm{NH}4})2}{\mathrm{SO}4}), post-treatment stirring speed (1500 rpm), and time (30 min) were obtained. Under the optimal conditions, the water retention values and tear, tensile, and burst indexes increased about 54 %, 277 %, 394 %, and 98 %, respectively. This work demonstrates that this technical route can effectively improve fiber swelling capacity and paper strength.
Source: crossref · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Cellulose Research Studies · Lignin and Wood Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemistry and Materials Engineering , 518081 Liupanshui Normal University , Liupanshui , China
Faculty of Chemical Engineering , 47910 Kunming University of Science and Technology , Kunming , China
College of Chemistry and Environmental Science , Qujing Normal University , Qujing , China
Limerick Pulp and Paper Centre , 3427 University of New Brunswick , Fredericton , Canada
Yunnan Yunjing Forestry and Pulp Mill Co., Ltd , Jinggu , China
Funding
National Natural Science Foundation of China · Key Supported Discipline of Guizhou Provence
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