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The relatively poor mechanical strengths of ordinary hydrogels confine their extensive practical applications in many areas. In this work, we fabricated the poly(acrylamide) (PAAm)/hectorite (Laponite® XLS) double-network (DN) hydrogels containing neutral PAAm microgels, which displayed higher strength than the hydrogels without PAAm microgels. The mechanical strength was up to 110KPa with 2wt% hectorite...
The stability of colloidal kaolinite dispersions in the presence of dodecylamine (DDA) has been studied in this work through the measurements of aggregation degree, zeta potential and adsorption. The experimental results show that DDA can induce a strong aggregation of colloidal kaolinite in aqueous suspensions even though the particles are highly negatively charged. This aggregation closely correlated...
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