Study on Melt-blown Processing, Web Structure of Polypropylene Nonwovens and Its BTX Adsorption
Study on Melt-blown Processing, Web Structure of Polypropylene Nonwovens and Its BTX Adsorption
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DOI：
10.1007/s12221-016-5592-y
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发表时间：
2016-02-01
影响因子：
2.5
通讯作者：
Wei, Wuji
中科院分区：
文献类型：
--
作者：
Guo, Mulin;Liang, Haixia;Wei, Wuji
石油碳氢化合物会对环境和人类健康产生不利影响，特别是当它们以乳液和水溶液的形式存在时。熔喷法制备的非织造布是一种潜在的石油烃脱除材料。本文研究了聚丙烯熔喷非织造布的加工-结构-吸油性之间的关系。此外，在静态和动态条件下，研究了优化制备的聚丙烯熔喷非织造布对模拟消防废水中甲苯的吸附动力学和机理。结果表明，通过调节热风温度、计量泵转速和收集器距模头的距离，可以有效地控制纤维网结构，获得平均纤维直径3.0-10.5 μ m，比表面积0.5- 1.5m2/g，孔隙率71.0- 99.0%的纤维网。纤维直径越小、孔隙率越大，对纯BTX介质的吸附量越大。拟二级动力学模型能较好地描述乳化态和溶解态甲苯在静态和动态条件下的吸附行为。甲苯的吸附是吸附和毛细作用的结合，两者的贡献率约为1：14。
Petroleum hydrocarbons can have adverse impacts on the environment and human health especially when they exist in the form of emulsion and aqueous solution. Nonwovens prepared by melt-blown method are a potential candidate for the removal of petroleum hydrocarbons. In this study, the processing-structure-oil sorption relationships of the PP (polypropylene) melt-blown nonwovens were investigated. Besides, the kinetics and mechanism of toluene sorption in simulated fire-fighting wastewater on the optimized prepared PP melt-blown nonwovens were studied at the static and dynamic conditions. The results showed that the web structure can be effectively controlled by adjusting the hot air temperature, metering pump speed and distance of collector to die to obtain an average fiber diameter of 3.0-10.5 mu m,surface area of 0.5-1.5 m(2)/g and porosity of 71.0-99.0 %. The sorption capacity for pure BTX medium increased with the decreasing fiber diameter and increasing porosity. The pseudo-second-order kinetic model better fitted the experimental data to describe the sorption of emulsified and dissolved form of toluene at static and dynamic conditions. The toluene sorption can be a combination of adsorption and capillarity, the contribution of which was about 1:14.