聚乙烯醇纤维在水泥基复合材料中的分散性表征及调控

发布时间：2018-01-19 06:06

本文关键词： 聚乙烯醇纤维分散性荧光分析技术分散剂　出处：《硅酸盐学报》2015年08期 　论文类型：期刊论文

【摘要】：为了建立聚乙烯醇(PVA)纤维在水泥基复合材料(FRCC)中的分散性表征技术和调控方法,采用荧光光谱仪和荧光显微镜+图像分析软件分别对PVA纤维的荧光特性及其在FRCC中的荧光图像进行获取和分析,再研究搅拌工艺、纤维长径比及体积掺量、分散剂对PVA纤维分散性的影响。结果表明:PVA纤维最佳激发和发射波长范围分别为415~460 nm及480~540 nm,荧光图像获取时应选择绿色荧光蛋白(GFP)滤波器;基于荧光图像分析,建立荧光分析技术,利用纤维分散系数和有效利用率两个评价指标对PVA纤维的分散性能进行定量表征;采用同掺法搅拌6 min后,再掺入分散剂可使PVA纤维(长度12 mm、直径27μm、体积掺量0.3%)在FRCC中的有效利用率较基准提高了32.9%。
[Abstract]:In order to establish the dispersity characterization technique and control method of PVA fiber in cement matrix composites (FRCCs). Fluorescence characteristics of PVA fiber and fluorescence image in FRCC were obtained and analyzed by fluorescence spectrometer and fluorescence microscope image analysis software respectively. Fiber aspect ratio and volume content. The effect of dispersant on the dispersion of PVA fiber shows that the optimum excitation and emission wavelengths are 415460nm and 480440nm, respectively. Green fluorescent protein (GFP) filter should be selected when acquiring fluorescence image. Based on the fluorescence image analysis, the fluorescence analysis technique was established, and the dispersion property of PVA fiber was quantitatively characterized by two evaluation indexes: fiber dispersion coefficient and effective utilization ratio. After mixing for 6 min, the PVA fiber (12 mm in length and 27 渭 m in diameter) can be made by adding dispersant. The effective utilization ratio in FRCC was increased by 32.9.
【作者单位】：高性能土木工程材料国家重点实验室江苏省建筑科学研究院;江苏苏博特新材料股份有限公司;
【基金】：国家自然科学基金重点项目(51438003) 江苏省科技计划青年基金项目(BK20141012)
【分类号】：TU528
【正文快照】： LIU Jianzhong1,2,ZHANG Lihui1,2,LI Changfeng1,2,LIU Jiaping1,2(1.State Key Laboratory of High Performance Civil Engineering Materials,Jiangsu Research Institute of Building Science,Nanjing 210008;2.Jiangsu Sobute New Materials Co.Ltd.,Nanjing 211103)传统

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