期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 384, 期 1-3, 页码 150-156出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2011.03.048
关键词
Sizing; ASA; Hydrolyzed ASA; Laponite; Short amine; Emulsification; Solid stabilized emulsions
资金
- National Natural Science Foundation of China [20976099]
- Shandong Natural Science Foundation [ZR2010CM008]
- Taishan Scholar Program of Shandong Province
Alkenyl succinic anhydride (ASA) is an internal sizing agent used to hydrophobize paper and paper-board in paper making process. Partly hydrolyzed ASA (hereinafter referred to as PH-ASA) emulsions can be stabilized by Laponite and short amines such as ethylamine, n-propylamine and n-butylamine. It is found that the short amines may improve the affinity of Laponite particles to PH-ASA, favoring PH-ASA emulsification, forming emulsion of high stability and small droplets. It is further observed that the sizing development of the PH-ASA on bleached chemi-mechanical pulp (BCTMP) is promoted when aluminum sulfate is added. Amine with longer carbon chain is more efficient both in promoting PH-ASA emulsification and in its sizing process. The amine molecules adsorbed on Laponite are more effective in stabilizing PH-ASA emulsions while the free amine in the dispersion work more efficiently in promoting sizing performance through a mechanism of accelerating the reaction between hydrolyzed ASA and aluminum sulfate. However, the PH-ASA emulsions lose most of their sizing effect by hydrolysis within 60 min. (C) 2011 Elsevier B.V. All rights reserved.
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