烯基琥珀酸酐疏水化淀粉的性能及其表面施胶应用研究

摘要

为制备一种环境友好型表面施胶剂,采用烯基琥珀酸酐(ASA)对淀粉进行疏水改性,使用红外光谱(FT-IR)、X射线衍射(XRD)、扫描电镜(SEM)和表面张力仪等测试手段对其性能进行了表征,并将烯基琥珀酸酐疏水化改性淀粉作为纸张表面施胶剂进行应用研究.结果表明,在淀粉分子上成功引入疏水性长链,淀粉颗粒形貌发生了变化,烯基琥珀酸酐疏水化淀粉施胶浓度为5％时,其施胶度可达206s,动态接触角达120°以上.%In order to prepare a kind of environment-friendly surface sizing agent, the starch was modified by alkenyl succinic anhydride (ASA) , and the performances were characterized by the infrared spectrum (FT-IR) , X-ray diffraction (XRD) , scanning electron microscopy (SEM), surface tension meter and so on, and the sur-face sizing effect of hydrophobic starch modified by ASA was studied. The results showed that, the hydropho-bic long chain was introduced onto the guar gum successfully, the morphology of starch granules changed. As the dosage of modified guar gum was 5%, the sizing degree was up to 206s, and the dynamic contact angle (DCA) was more than 120°.