聚乙烯醇包覆玉米秸秆纤维对石膏性能的影响  

Effects of Polyvinyl Alcohol Encapsulation Cornstalk Fiber on Performance of Gypsum

作　　者：李国忠[1] 刘民荣[1] 高子栋[1] 王裕银[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《建筑材料学报》2011年第2期278-281,286,共5页Journal of Building Materials

基　　金：国家自然科学基金资助项目(50972051);山东省自然科学基金资助项目(Y2008F12)

摘　　要：利用玉米秸秆纤维增强石膏胶凝材料,并采用聚乙烯醇对玉米秸秆纤维进行表面包覆改性,研究其对玉米秸秆纤维/石膏复合材料性能的影响.利用扫描电子显微镜对试样进行了微观分析,探讨了未改性玉米秸秆纤维/石膏复合材料防水性能较差的原因,提出了聚乙烯醇包覆改性秸秆纤维的示意模型.结果表明:掺加未改性玉米秸秆纤维可提高石膏胶凝材料的力学性能,但防水性能下降幅度较大;玉米秸秆纤维经改性后,改性秸秆纤维/石膏复合材料的力学性能进一步提高,防水性能显著改善.Gypsum cementitious material was reinforced by adopting cornstalk fibers which were modified by polyvinyl alcohol encapsulation with the result that the performance of cornstalk fiber/gypsum composites would be improved.The microscopic structure of samples was analysed by scanning electron microscope,and the reason why unmodified cornstalk fiber/gypsum composites had poor waterproof properties was discussed.Modification model of polyvinyl alcohol coating cornstalk fiber is investigated.The results show that mechanical properties of cornstalk fiber/gypsum composites is improved,but waterproof performance is declined greatly by adopting unmodified plant fibers.The mechanical properties and waterproof properties of cornstalk fiber/gypsum composites are improved by adopting cornstalk fibers modified.

关 键 词：石膏 玉米秸秆纤维 复合材料 改性 

分 类 号：TQ177.3[化学工程—硅酸盐工业]