Roles of short amine in preparation and sizing performance of partly hydrolyzed ASA emulsion stabilized by Laponite particles
Roles of short amine in preparation and sizing performance of partly hydrolyzed ASA emulsion stabilized by Laponite particles
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短胺在锂皂石颗粒稳定部分水解ASA乳液制备及施胶性能中的作用
DOI：
10.1016/j.colsurfa.2011.03.048
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发表时间：
2011-07
期刊：
影响因子：
--
通讯作者：
Zhenhuan Zhao
中科院分区：
文献类型：
--
作者：
Pengxiang Ding;Wenxia Liu;Zhenhuan Zhao
烯基琥珀酸酐(ASA)是一种用于造纸过程中对纸和纸板进行疏水的内部施胶剂。部分水解型ASA(以下简称PH-ASA)乳状液可被膨润土和乙胺、正丙胺、正丁胺等短胺稳定。结果表明，短胺的加入可以提高磷灰石颗粒对PH-ASA的亲和力，有利于PH-ASA的乳化，形成稳定性高、液滴小的乳状液。进一步观察到，硫酸铝的加入促进了PH-ASA在漂白化学机械浆(BCTMP)上的施胶发展。碳链较长的胺在促进PH-ASA乳化和施胶过程中都更有效。吸附在膨润土上的胺分子对PH-ASA乳液的稳定效果更好，而分散体中的游离胺通过促进水解的ASA与硫酸铝的反应更有效地改善了施胶性能。然而，PH-ASA乳液在60分钟内通过水解失去了大部分施胶效果。
Alkenyl succinic anhydride (ASA) is an internal sizing agent used to hydrophobize paper and paperboard 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 andn-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.
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DOI：
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发表时间：
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