Adhesion of poly(vinylamine) microgels to wet cellulose
Adhesion of poly(vinylamine) microgels to wet cellulose
复制标题
聚（乙烯胺）微凝胶对湿纤维素的粘附
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
R. Pelton
中科院分区：
文献类型：
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作者：
Chuanwei Miao;Andy Chen;R. Pelton
以甲基乙基酮（MEK）为原料，采用沉淀聚合法制备了1,3-二乙烯基咪唑烷-2-酮（BVU）交联的聚n -乙烯基甲酰胺微凝胶。碱性水解得到一系列聚乙烯胺（PVAm）微凝胶。通过脱层实验研究了微凝胶在再生纤维素膜上的湿黏附性能，并与线性PVAm的结果进行了比较。在聚合物覆盖率（即粘接接头中聚合物的用量）为15 mg/m2以上，线状聚合物和微凝胶的粘附性相似，更高的聚合物覆盖率不会进一步提高湿强度。然而，当聚合物从溶液中吸附到湿的纤维素膜上时，由于微凝胶在膜上形成了更厚的聚合物层，因此微凝胶对膜的分层力要比线性聚合物强得多。共聚焦激光扫描显微镜…
Poly(N-vinylformamide) microgel, crosslinked by 1,3-divinylimidazolid-2-one (BVU), was synthesized via precipitation polymerization in methyl ethyl ketone (MEK), giving aggregated particles with a broad size distribution. Alkaline hydrolysis yielded a series of poly(vinylamine) (PVAm) microgels. The wet adhesion properties of the microgels on a regenerated cellulose membrane were studied by delamination experiments, and the results were compared with that of a linear PVAm. Above the polymer coverage (i.e., the amount of polymer in the adhesive joint) of 15 mg/m2, the linear polymer and the microgel give similar adhesion, and higher polymer coverage does not increase the wet strength any further. However, when the polymers are applied on the wet cellulose membranes by adsorption from solution, the delamination force of the membranes with the microgel was much stronger than those with the linear polymer, because the microgel formed a much thicker polymer layer on membranes. Confocal laser scanning microscop...