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%.
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