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在H2O2/FeSO4双组分氧化还原体系中,以酶改性木薯淀粉为主链,以苯乙烯(St)、丙烯酸丁酯(BA)、丙烯腈(AN)、丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DM)为单体,通过无皂乳液聚合制备了酶改性接枝物乳液。探讨了α-淀粉酶改性木薯淀粉的工艺对单体转化率的影响,通过红外光谱(FT-IR)、静态接触角和扫描电子显微镜(SEM)对酶改性淀粉接枝物进行结构和性能表征。结果表明,酶改性淀粉接枝物乳液有很好的施胶性能,当聚合物乳液用量为施胶液的0.5%时,施胶效果达到最佳。
In the H2O2 / FeSO4 two-component redox system, the enzyme-modified tapioca starch as the main chain, styrene (St), butyl acrylate (BA), acrylonitrile (AN), acrylamide (AM) and dimethyl Base-diallyl ammonium chloride (DM) was used as monomer to prepare enzyme-modified graft emulsion by soap-free emulsion polymerization. The effects of α-amylase-modified tapioca starch on the monomer conversion were investigated. The structure and properties of the modified starch graft were investigated by FT-IR, static contact angle and scanning electron microscopy (SEM) Performance Characterization. The results showed that the enzyme-modified starch grafted latex had good sizing performance. When the amount of polymer latex was 0.5% of the sizing liquid, the sizing effect was best.