衣康酸改性苯丙胶乳及其在阻燃性空气滤纸中的应用

Modification of Styrene Acrylic Emulsion with Itaconic Acid and Its Application in Flame-retardant Air Filter Paper

关键词:  衣康酸  苯丙胶乳  空气滤纸  阻燃

Key Words:itaconic acid  styrene-acrylic emulsion  air filter paper  flame retardant

摘要:本研究采用衣康酸作为功能性单体对苯丙胶乳进行改性，并将改性苯丙胶乳与阻燃剂复配，以浸渍施胶的方式对阻燃性空气滤纸的性能进行改善。研究表明，经衣康酸改性后的苯丙胶乳颗粒平均粒径为0.0868 μm，比改性前降低34.7%，机械稳定性、稀释稳定性及固含量均表现良好；当衣康酸用量为2%（占单体总质量）时，浸渍改性苯丙胶乳使纸张透气度降低约2.27%，挺度及耐破度达最优值，分别为3.40 mN∙m和290 kPa，比浸渍改性前的苯丙胶乳分别提高了27.8%及18.4%。将阻燃剂与改性苯丙胶乳按质量比1∶1.4进行复配后对空气滤纸原纸浸渍后发现，纸张的挺度、耐破度及极限氧指数达4.07 mN∙m、301 kPa和30.9%，满足我国有关阻燃性空气滤纸行业标准的性能要求。

Abstract:Styrene acrylic emulsion was modified with itaconic acid (IA) and applied in flame retardant air filter paper to enhance the strength performance. The results showed that the modified styrene acrylic emulsion (MSA) had an average particle diameter of 0.0868 μm, 34.7% lower than that before modification, and exhibited good performance in mechanical stability, dilution stability and solid content. The air filter paper impregnated with styrene acrylic emulsion modified with 2% IA (based on the mass of total monomers) achieved the optimum stiffness and bursting strength of 3.4 mN•m and 290 kPa respectively, which were respectively 27.8% and 18.4% higher than that of the samples impregreated with unmodified styrene acrylic. However, its permeability decreased 2.27%. The air filter paper impregnated with both MSA and flame retardant at mass ratio of 1∶1.4, its stiffness, bursting strength, and limited oxygen index reached: 4.07 mN·m，301 kPa， 30.9% respectively, which could meet the properties standard of flame retardant air filter paper.