Effect of a cofactor on the polymer bridging of latex particles to glass by polyethylene oxide
Effect of a cofactor on the polymer bridging of latex particles to glass by polyethylene oxide
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DOI：
10.1016/0927-7757(96)03715-6
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发表时间：
1996-11
期刊：
影响因子：
--
通讯作者：
H. Takase;T. V. D. Ven
中科院分区：
文献类型：
--
作者：
H. Takase;T. V. D. Ven
高分子量聚环氧乙烷（PEO）的聚合物桥接通过辅因子（通常为低分子量酚类化合物）增强。PEO-辅因子体系广泛用于造纸中作为所谓的助留剂。在这项研究中，一个特定的辅因子，磺化硫酸盐木质素（SKL），对聚合物的PEO桥的影响，进行了研究。用冲击射流技术观察了乳胶球在PEO涂层玻璃表面的沉积过程。沉积动力学主要由静电控制，因为在表面形成的胶乳颗粒和PEO-SKL复合物都带负电荷。剥离动力学的强烈影响SKL的分数非常强烈的结合颗粒的增加。当SKL浓度超过1 mg l− 1时，弱结合的粒子需要更长的时间才能脱离。这些研究表明，SKL增强了胶乳和玻璃之间的PEO桥。
Polymer bridging by high molecular weight polyethylene oxide (PEO) is enhanced by a cofactor, usually a low molecular weight phenolic compound. PEO-cofactor systems are widely used in papermaking as a so-called retention aid. In this study the effects of one particular cofactor, sulfonated kraft lignin (SKL), on polymer bridging by PEO, was investigated. The deposition of latex spheres on a glass surface coated by PEO was observed with the impinging jet technique. The deposition kinetics were mainly controlled by electrostatics, since both the latex particles and the PEO-SKL complexes formed at the surface are negatively charged. The detachment kinetics were strongly affected by SKL as the fraction of very strongly bound particles increased. At SKL concentrations above 1 mg l−1it took longer for the weakly bound particles to detach. These studies show that SKL strengthens the PEO bridge between latex and glass.