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采用无皂乳液聚合,以甲基丙烯酸甲酯(MMA),丙烯酸丁酯(BA),丙烯酸(AA),丙烯酸羟丙酯(HPA)等为原料,γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)为硅烷交联剂,制备了一种稳定的阴离子型聚丙烯酸酯微乳液,其可作为表面施胶剂用于纸张表面增强处理。讨论了KH570用量对乳液及施胶纸张性能的影响。结果表明,有机硅氧烷单体成功的键接到丙烯酸酯聚合物上,且当ω(KH570)=1.78%(质量分数,下同)时,乳液综合性能佳且其施胶效果好,乳液粒径低至45.80nm。表面施胶后的纸张强度有明显提升,干湿强度分别提高26.5%、27.1%,耐折度提高332.4%,施胶度提高49.85%,纸张水滴接触角可由35.2°增加至59.1°。
Using soap-free emulsion polymerization, methyl methacrylate (MMA), butyl acrylate (BA), acrylic acid (AA) and hydroxypropyl acrylate (HPA) Trimethoxysilane (KH570) is a silane crosslinking agent, a stable anionic polyacrylate microemulsion was prepared, which can be used as a surface sizing agent for surface treatment of paper. The effect of KH570 dosage on the properties of emulsion and sizing paper was discussed. The results show that the organosiloxane monomer is successfully bonded to the acrylate polymer, and when ω (KH570) = 1.78% (mass fraction, the same below), the overall performance of the emulsion and the sizing effect is good, the emulsion The particle size is as low as 45.80 nm. After the surface sizing, the paper strength was significantly improved. The wet and dry strength increased by 26.5% and 27.1% respectively, the folding resistance increased by 332.4% and the sizing degree increased by 49.85%. The contact angle of paper droplet increased from 35.2 ° to 59.1 °.