王明学,Muhammad Fahad Arain,张华鹏,郭玉海
WANG Ming-xue,Muhammad Fahad Arain,ZHANG Hua-peng,GUO Yu-hai

• 1:浙江理工大学材料与纺织学院丝绸学院

摘要(Abstract)：

采用有机硅柔软剂对国产聚乙烯醇(PVA)纤维进行表面改性,并制备了纤维增强水泥基复合材料(PVA-ECC)。采用扫描电子显微镜研究了有机硅柔软剂改性对PVA纤维表面结构的影响,用三点弯曲试验研究了有机硅柔软剂改性的PVA纤维对PVA-ECC复合材料弯曲性能的影响。研究结果表明:随着有机硅柔软剂含量的增加,PVA-ECC的极限弯曲强度和极限跨中挠度均先增加再减小,当有机硅柔软剂质量分数为7%时,极限弯曲强度和极限跨中挠度达到最大值,分别为5.627 MPa和2.123 mm;用ASTM C1609标准分析PVA-ECC三点弯曲韧性,当有机硅柔软剂质量分数为7%时,弯曲韧性达到最大值。
The surface of polyvinyl alcohol(PVA) fiber was modified by silicone softener with different concentrations. The modified PVA fiber was used to prepare PVA fiber reinforced engineered cementitious composites(PVA-ECC). The effects of PVA fiber surface modification were examined by scanning electron microscope and composite flexural properties were studied by the three-point bending test. The test results show that the ultimate flexural strength and the ultimate mid-span deflection of PVA-ECC first increase then decrease with the increasing of the concentration of silicone softener. The study concludes that the optimum concentration of silicone softener of 7% provides the enhanced flexural performance with ultimate flexural strength and ultimate mid-span deflection values of 5.627 MPa and 2.123 mm, respectively. The three-point bending toughness of PVA-ECC was analyzed by ASTM C1609 standard. When the concentration of silicone softener was 7%, the bending toughness reached the maximum.

关键词(KeyWords)： PVA纤维;表面改性;水泥基复合材料;有机硅柔软剂;弯曲性能
PVA fiber;surface modification;engineered cementitious composite;silicone softener;flexural property

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(21706238)

作者(Author): 王明学,Muhammad Fahad Arain,张华鹏,郭玉海
WANG Ming-xue,Muhammad Fahad Arain,ZHANG Hua-peng,GUO Yu-hai

DOI: 10.16090/j.cnki.hcxw.20190114.008

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