交联淀粉/聚乙烯醇可降解树脂的制备及改性  

Fabrication and Modification of Crosslinked Corn Starch/Polyvinyl Alchol Degradable Resin

作　　者：梁亮[1] 何广生[1] 史博[1] 

机构地区：[1]广东石油化工学院化学工程学院,广东茂名525000

出　　处：《广东石油化工学院学报》2016年第4期23-27,共5页Journal of Guangdong University of Petrochemical Technology

基　　金：茂名市科技计划(201325);广东省橡塑材料制备与加工工程技术研究中心开放基金

摘　　要：采用微波辐照技术对玉米淀粉进行了间歇式交联改性,对CaCO_3进行了表面亲油性处理,再将交联改性的玉米淀粉、聚乙烯醇（PVA）、甘油及其它助剂经混炼、压片得到交联淀粉/聚乙烯醇（C-CS/PVA）可降解树脂,对其进行了CaCO_3增强改性,并采用红外光谱、扫描电镜、拉伸等测试方法对其进行了表征。研究结果表明：采用硬脂酸和月桂酸钠可成功对CaCO_3进行表面有机改性,其表面亲油化度可达55.6%;淀粉交联改性后仍能保持分散及表面形貌,粒径为5~20μm;当淀粉用量为30份时C-CS/PVA可降解树脂的拉伸强度约为20MPa,断裂伸长率为233%,略低于行业标准;使用改性纳米CaCO_3对C-CS/PVA可降解树脂增强,其拉伸强度可提高到22.5MPa,断裂伸长率由233%提升至350%,增强增韧效果显著。Corn starch is cross-linked via microwave irradiation,and CaCO_3 is organized by stearic acid.Then,the cross-linked corn starch（ C-CS）,polyvinyl alcohol（ PVA）,glycerol and other additives are blended homogeneously by internal mixter.The obtained blended is molded to obtain C-CS/PVA degradable resin,which is subsequently reinforced and modified by CaCO_3.Infrared spectrum,scanning electron microscope and strength testing are used to characterize the performance of C-CS/PVA degradable resin.The results show that the surface modification of stearic acid to CaCO_3 is successful with 55.6% lipophilic degree.The modified C-CS can remain dispersion and the original shape with an average diameter 5 ~ 20 μm.The tensile strength of C-CS /PVA with 30 parts of C-CS is nearby 20 MPa.However,the elongation at break is slightly lower than the certification.Being reinforced with organized CaCO_3,the tensile strength of C-CS/PVA with 30 parts of C-CS increases up to 22.5 MPa,and the elongation at break changes from 233% to 350%.

关 键 词：可降解树脂 PVA 交联淀粉 CACO3 增强 

分 类 号：TQ320.7[化学工程—合成树脂塑料工业]