中文核心期刊
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国际刊号:1005-2615
国内刊号:32-1429/V
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  • 主管:工业和信息化部
  • 主办:南京航空航天大学
  • 国际刊号:1005-2615
  • 国内刊号:32-1429/V
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刘璇 崔益华 郝森捷 陈海燕.黄麻纤维表面原位沉积纳米SiO2工艺以及机理探究[J].南京航空航天大学学报,2018,50(1):105-114
黄麻纤维表面原位沉积纳米SiO2工艺以及机理探究
Process and Mechanism Research of Depositing Nano-SiO2 on the Surface of Jute Fiber via in Situ Synthesis
  
DOI:10.16356/j.1005-2615.2018.01.015
中文关键词:  黄麻纤维  纳米SiO2  超声-溶胶凝胶法  沉积工艺  成核生长机理
英文关键词:jute fiber  nano-SiO2  sol-gelmethod  deposition process  nucleation and growth mechanism
基金项目:
作者单位
刘璇 崔益华 郝森捷 陈海燕 南京航空航天大学材料科学与技术学院南京21110 
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中文摘要:
      采用超声溶胶凝胶法在黄麻纤维表面原位沉积纳米SiO2,通过红外光谱分析,微观形貌分析以及沉积量测试,讨论了不同工艺参数对纳米SiO2沉积效果的影响。结果表明:随着正硅酸乙酯(TEOS)浓度或氨水浓度的增加,纳米SiO2的沉积量逐渐增多,粒径逐渐增大;随着沉积温度的升高,纳米SiO2的沉积量逐渐减少,粒径逐渐减小;与沉积温度为20 ℃相比,当沉积温度为60 ℃时,纳米SiO2的沉积量减少了36.4%、粒径减小了37.8%;沉积时间主要影响纳米SiO2的沉积量,对其粒径的影响不明显。通过实验探究了纳米SiO2成核与生长的机理:黄麻纤维表面的孔隙结构为纳米SiO2提供了成核位点;TEOS经过水解缩合反应形成短链交联结构,通过氢键或化学键沉积于黄麻纤维表面的孔隙中;短链交联结构经过成核与生长过程,逐渐形成纳米SiO2颗粒。因此,通过对工艺参数合理地选择,可以调控纳米SiO2在黄麻纤维表面成核与生长阶段的形貌与沉积量。
英文摘要:
      We deposite nano-SiO2 on the surface of jute fiber by using the sol-gel method with ultrasonic treatment. We study the effects of different process parameters on the nano-SiO2 deposition through infrared spectroscopic analysis, morphology analysis and deposition amount test. The results show that the deposition amount and particle size of nano-SiO2 are gradually increased with the increase of TEOS concentration or ammonia concentration. When the deposition temperature gradually increases, the deposition amount and particle size of nano-SiO2 are both decreased. Especially when the deposition temperature is 60 ℃, the deposition amount and particle size of nano-SiO2 are decreased by 36.4% and 37.8%, respectively, compared with the deposition temperature of 20 ℃. The deposition time mainly influences the deposition amount of nano-SiO2, while the particle size of nano-SiO2 is not changed significantly. The nucleation and growth mechanism of nano-SiO2 is explored by the experimental results. The flaws on the jute fiber surface are favorable for the nucleation and growth of nano-SiO2. Cross-linked structures are formed by hydrolysis and condensation of TEOS, which can form the physical or chemical bonds with jute fibers. After the process of nucleation and growth, nano-SiO2 particles are formed gradually. Therefore, the deposition amount and particle size of nano-SiO2 on the surface of jute fiber can be manipulated by selecting process parameters during nucleation and growth process.
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