Adhesion of Gels by Silica Particle
Adhesion of Gels by Silica Particle
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DOI：
10.1021/jp410367v
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发表时间：
2014-03-06
影响因子：
3.3
通讯作者：
Hashimoto, Shuji
中科院分区：
文献类型：
--
作者：
Abe, Hidekazu;Hara, Yusuke;Hashimoto, Shuji
在这项研究中，开发了一种方法，用于实现两个带正电荷的凝胶之间的粘附具有高的机械强度。通过利用二氧化硅颗粒分散体作为粘合剂，凝胶容易彼此粘附，并且当浸入水溶液中时保持稳定长达11天。两种带正电荷的半互穿网络凝胶与二氧化硅颗粒之间的粘附力被测量为高达约20 kPa，这比使用带电荷的富含聚合物的液体作为交联剂的粘附力（约1.5 kPa）大约10倍。结果表明，粘附力是两种类型的相互作用的结果：阳离子凝胶表面之间的静电吸引力和二氧化硅颗粒之间的氢键。此外，它表明，粘附力是依赖于溶液的pH值，这是由于在二氧化硅颗粒的电荷的变化。
In this study, a method for achieving adhesion between two positively charged gels with high mechanical strength was developed. By utilizing a silica particle dispersion as a binder, the gels easily adhered to each other and remained stable for up to 11 days when immersed in aqueous solution. The adhesion force between the two positively charged semi-interpenetrating network gels with the silica particle was measured to be up to approximately 20 kPa, which is around 10 times larger than that with a charged polymer-rich liquid as a cross-linker (approximately 1.5 kPa). It was demonstrated that the adhesion force was a result of two types of interactions: an electrostatic attractive force between the cationic gel surface and hydrogen bonding among the silica particles. In addition, it was shown that the adhesion force was dependent on solution pH, which was attributed to changes in the charge of the silica particles.