Pickering氨基硅油乳液的制备及其应用性能OA

Silicone emulsions are widely utilized in textile finishing due to their superior lubricity,low surface energy,and thermal stability,and can endow fabrics with soft and smooth properties.However,conventional silicone emulsions rely on high-concentration surfactants to maintain stability.This not only increases costs but also hinders the adsorption of silicone oil onto the fabric surface,thereby compromising the finishing effect.Moreover,residual surfactants in wastewater significantly elevate chemical oxygen demand(COD),imposing a heavier burden on sewage treatment.To address these challenges,in this study,silica(SiO2)particles were combined with low-dose surfactants to construct a"SiO2 particle-surfactant"synergistic stabilization system,and its application efficacy in textile finishing was investigated. The research revealed that anionic SiO2 particles bond to positively-charged silicone oil droplets through electrostatic attraction,significantly enhancing the stability of the emulsion.In contrast,cationic particles exhibited a relatively weak stabilizing effect due to the electrostatic repulsion between them and the oil droplets.After the introduction of SiO2 particles,the dosage of surfactants was reduced by 66.7%compared to the conventional method.The resulting emulsion possessed both high dispersion stability and a uniform particle size distribution.Increasing the amount of SiO2 particles could improve the emulsion stability and reduce the average droplet size.When larger-sized particles were selected,the emulsion stability was enhanced,but the average droplet size increased.Further investigations demonstrated that this Pickering silicone emulsion could facilitate the efficient deposition of silicone oil onto the finished fabric and reduce the residue of auxiliaries.By comparing the application effects of the composite stabilization system and the single-surfactant system in textile finishing,and combining the results of COD tests on the residual liquor and friction coefficient measurements,the study found that the composite stabilization system significantly reduced the pollution of the finishing residual liquor.When the working liquor concentration was 10 g/L,as the dosage of the surfactant in the single-surfactant system increased from 7%to 21%,the COD value of the residual liquid rose from 33.6 g/L to 60.5 g/L.In contrast,the COD value of the residual liquid in the composite stabilization system decreased from 85.7 g/L(before finishing)to 38.0 g/L.The surface properties of the finished fabric were significantly improved.The static and dynamic friction coefficients decreased from 0.78 and 0.75 for the untreated fabric to 0.44 and 0.41,respectively,indicating exceptional smoothness and softness. The synergistic stabilization system constructed in this study,which combines SiO2 particles with low-dose surfactants,offers an innovative alternative to traditional silicone emulsions.Pickering-stabilized emulsions demonstrate significant application value and promotion potential in the field of textile finishing.By optimizing the particle size,dosage,and the compatibility between particles and surfactants,the multiple objectives of enhancing emulsion stability,reducing environmental impact,and improving finishing performance have been achieved.This technology effectively reduces reliance on surfactants,lowers production costs and the pressure on sewage treatment,and provides theoretical guidance and technical support for developing environmentally friendly and high-efficiency silicone emulsions.