有机硅表面施胶剂的制备及性能研究

摘要

在H2O2-FeSO4双组分氧化还原体系中,以酶改性淀粉为主链,以苯乙烯(St)、丙烯酸丁酯(BA)、丙烯腈(AN)、丙烯酰胺(AM)、二甲基二烯丙基氯化铵(DMDAAC)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷为单体,通过自由基聚合制备了一种有机硅表面施胶剂.对其工艺条件进行了探讨,最佳工艺为:m(α-淀粉酶)∶m(绝干淀粉)=0.004,m(FeSO4)∶m(H2O2) =0.04,DMDAAC用量为有机硅表面施胶剂的0.6％,AN用量为有机硅表面施胶剂的1.5％,AM用量为有机硅表面施胶剂的0.4％,有机硅单体用量为有机硅表面施胶剂的2％,m(St)∶m(BA) =2,m(单体总量)∶m(淀粉)=2.4.通过红外光谱(FT-IR)、静态接触角和扫描电子显微镜(SEM)对其结构和性能进行表征.结果表明,有机硅表面施胶剂提高了瓦楞原纸的施胶性能,当有机硅表面施胶剂用量为表面施胶液的0.5％时,施胶效果达到最佳.%Organic silicon surface sizing agent was prepared by radical polymerization with the enzyme modified cassava starch as main raw material, styrene(St) , butylacrylate(BA), acrylonitrile( AN), acrylamide(AM), dimethyl diallyl ammonium chloride(DMDAAC) and y-methyl-acryloyl trimethoxysilane as monomers in H2O2-FeSO4 oxidation-reduction initiator system. The optimum synthesis conditions were as follows; m(α-amylase):m(starch) =0.004, m(FeSO4):m(H2O2) =0.04, DM dosage being 0.6% of emulsion, AN dosage being 1.5% of emulsion, AM dosage being0.4% of emulsion, organic silicon monomer dosage being 2% of emulsion, m(St):m(BA) = 2, m(mono-mers):m( starch) =2.4. The structure and performance of the surface sizing agent were characterized by FT-IR, static contact angle and SEM. The experiment demonstrated that the polymer could improve corrugating medium sizing performance. The sizing performance was optimum when the dosage of surface sizing agent was 0.5%.