微胶囊-玄武岩纤维/水泥复合材料的力学性能  

Mechanical properties of microcapsule-basalt fiber/cement composites

作　　者：邢锋[1] 倪卓[2] 黄战[2] 

机构地区：[1]深圳大学土木工程学院,深圳518060 [2]深圳大学化学与化工学院,深圳518060

出　　处：《复合材料学报》2014年第1期133-139,共7页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51378315);深圳市战略新兴产业专项资金(JCYJ20130329114709152)

摘　　要：以水泥、玄武岩纤维和脲醛/环氧树脂微胶囊为主要材料,制备水泥基复合材料标准试样,研究纤维掺量、纤维长度、微胶囊质量分数、水灰质量比和养护龄期对复合材料抗折强度和抗压强度的影响,利用正交实验确定微胶囊-玄武岩纤维/水泥自修复复合材料力学性能的最优配比。实验结果表明:抗折强度随着纤维掺量的增加而增加,抗压强度随着纤维掺量增加而减小;随着纤维长度的增加,抗折强度略有增加,抗压强度略有降低;抗折强度随着微胶囊质量分数的增加呈现出先增加后减小的趋势,而抗压强度则呈现下降趋势;抗折强度与抗压强度随养护龄期的增加而呈增加的趋势;材料经损伤后修复,抗折强度修复率为117%,恢复率为103%,抗压强度修复率为71%,恢复率为97%。Standard specimens of microcapsule-basalt fiber/cement composite materials were prepared with cement, basalt fiber and microcapsule, designed with epoxy resin as cores and urea-formaldehyde resins （UF） as shells. Effects of fiber contents, fiber length, microcapsule mass fractions, water-cement ratio, and the curing duration were studied to the flexural strength and compressive strength of the composites. The best proportion of mechanical properties of self-healing composite was chosen by orthogonal design experiments. Results show the flexural strength rises with the increase of fiber contents. However, the compressive strength rises with the decrease of fiber contents. With the rising of fiber length, the flexural strength increases slightly while the compressive strength decreases slightly. The flexural strength rises at first and then reduces with the increase of flexural strength, while the compressive strength reduces. Both the flexural strength and the compressive strength rise with the increase of the curing duration. Composites can be repaired by self-healing microcapsule spontaneously after damages. The healing and recovery rate of flexural strength is 117%and 103%. The healing rate and recovery rate of compressive strength is 71% and 97%.

关 键 词：正交设计 力学性能 微胶囊 玄武岩纤维 自修复复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]