摘要
采用玉米秸秆纤维作为脱硫建筑石膏的增强材料,通过力学性能测试实验研究了不同掺量秸秆纤维对石膏基复合材料力学性能的影响,讨论了秸秆纤维的增强机制。结果表明,秸秆纤维的掺量为5%时,试样的抗折强度和抗压强度较空白样分别提高了92.31%和7.14%;采用碱处理法、聚丙烯酰胺化学包覆法、丙烯酸化学包覆法对秸秆纤维进行表面改性,通过力学性能测试实验和扫描电镜微观形貌观察研究了纤维表面改性对石膏基复合材料力学性能的影响。结果表明,纤维表面改性改善了复合材料的界面结合状况,进一步提高了复合材料的力学性能,丙烯酸化学包覆改性可使脱硫建筑石膏复合材料的抗折强度较未改性玉米秸秆纤维/脱硫石膏复合材料提高55.71%,抗压强度提高22.99%。
Corn straw fibers were used as the reinforcement for desulfurization gypsum,through the experimental research on mechanical properties,the effects of different dosages of the corn straw fibers on the mechanical properties of the composite were studied.The results indicate that when the dosage of the corn straw fibers is 5%,compared with the blank sample,the samples flexural strength and compressive strength are enhanced by 92.31% and 7.14% respectively.The corn straw fibers were modified with alkaline treatment and chemical coating treatment using polyacrylamide and acrylic,through the experimental research on mechanical properties and observation on morphology using scanning electron microscopy,the effects of surface modification on the mechanical properties of the composite were studied.The results indicate that the interfacial bonding between the maize straw fibers and desulfurization gypsum is improved,and the mechanical properties of composite is increased.The research shows that the acrylic chemical coating method could enhance the strength of the composite.Compared with the unmodified corn straw fibre/desulfurization gypsum,the flexural strength increases by 55.71% and the compressive strength increases by 22.99%.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2010年第6期94-99,共6页
Acta Materiae Compositae Sinica
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)
关键词
脱硫石膏
秸秆纤维
复合材料
表面改性
desulfurization gypsum
corn straw fiber
composite materials
surface modification
