Study on Preparation and Application in Sizing of Nano-cationic Emulsion
In this study,emulsions of styrene-butyl acrylate copolymers were synthesized through emulsion polymerization utilizing dodecyl dimethyl benzyl ammonium chloride and in-house cationic Gemini surfactants as composite emulsifiers.The investigation focused on assessing the impact of emulsifier ratios and quantities on the fundamental properties and sizing characteristics of the emulsions.The findings revealed that an increase in the proportion of the Gemini emulsifier in the composite emulsifier led to an enlargement of the average particle size of the emulsion particles.The Cobb value of Cobb 60 exhibited an initial increase followed by a decrease,reaching a minimum value of 50.05 g·m-2 at a 6∶4 ratio.Moreover,higher dosages of the composite emulsifier resulted in smaller average particle sizes of the emulsion particles and reduced water absorption values of Cobb 60.As the dosage continued to increase,particle size remained relatively stable,but the water absorption value of Cobb 60 increased.Therefore,the optimal dosage of the composite emulsifier was determined to be 6％.
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