酸沥滤对高硅氧玻璃纤维结构及性能的影响  

Effect of Acid Leaching on Structure and Properties of High Silica Glass Fibers

作　　者：张帅明 罗理达[1,2,3] 丁林锋 刘郑威 蒋伟忠[1,2,3] 汪庆卫 ZHANG Shuaiming;LUO Lida;DING Linfeng;LIU Zhengwei;JIANG Weizhong;WANG Qingwei(State Key Laboratory for Modification of chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China;Engineering Center of Advanced Glass Manufacturing Technology,Ministry of Education,Donghua University,Shanghai 201620,China;Key Laboratory of Special Glass and Enamel for China Light Industry,Donghua University,Shanghai 201620,China;Linyi Haoquan Silicon Industry Technology Co.Ltd,Linyi 276003,Shandong,China)

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海201620 [2]先进玻璃制造技术教育部工程研究中心,上海201620 [3]中国轻工业特种玻璃及搪瓷重点实验室,上海201620 [4]临沂昊泉硅业科技有限公司,山东临沂276003

出　　处：《硅酸盐学报》2021年第8期1543-1549,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(51873032);中央高校基础研究项目(223201900003);山东省重点研发计划(2019JZZY010308)。

摘　　要：通过扫描电子显微镜和红外光谱仪观察纤维前驱体酸沥滤前后的形貌和结构变化,通过ICP分析Na^(+)的沥出过程,研究了盐酸浓度、温度以及沥滤时间对纤维前驱体Na^(+)沥出率及力学性能的影响。结果表明:高硅氧纤维前驱体在90℃的3 mol/L盐酸溶液中沥滤12h后,纤维中的Na^(+)沥出率达到85%以上;当盐酸浓度为5mol/L时,沥滤后纤维的强度保留率最高。在酸沥滤过程中纤维中的Na^(+)与盐酸中的H^(+)置换,在热处理过程中羟基进一步聚合脱水补强玻璃网络体,实现纤维强度的提升。The morphology and structure of fiber precursors before and after acid leaching were characterized by scanning electron microscopy(SEM) and infrared spectroscopy(IR), and the Na^(+) leaching process was characterized by inductively coupled plasma spectrometry(ICP). The effects of hydrochloric acid concentration, leaching temperature and time on the leaching rate of Na^(+) and mechanical properties of the fiber precursor were investigated. The Na^(+) leaching rate reaches 85% after leaching in 3 mol/L hydrochloric acid solution for 12 h at 90 ℃. The maximum strength retention rate of the fiber after leaching can be obtained when the concentration of hydrochloric acid is 5 mol/L. In this case, Na^(+) ions in the fiber are replaced with H^(+) ions in hydrochloric acid during the acid leaching process, whereas hydroxyl group is further polymerized and dehydrated, thus strengthening the glass network during the heat treatment process and improving the fiber strength.

关 键 词：酸沥滤 高硅氧 玻璃纤维 结构 强度 

分 类 号：TQ171.77[化学工程—玻璃工业]