电纺法制备WPU复合纤维膜及其空气过滤性能研究
发布时间：2018-11-15 08:50
【摘要】：寻找适用于电纺法制备空气过滤膜的聚合物材料已成为研究的热点,WPU(水性聚氨酯)作为一种无毒环保材料,WPU制备过滤膜相较于传统的材料安全性更高,由于粘度偏低限制了其在电纺领域的应用,本课题针对WPU粘度不高这一点,先合成增粘的WPU,之后用电纺法制备PVP(聚乙烯吡咯烷酮)/WPU复合过滤膜。第一步,通过理论计算优化配方,用MATLAB软件求解以BDO(1,4-丁二醇)含量为未知数的矩阵方程,用Chembio3d软件得到合成WPU产物的Prediction IR(预测红外图谱)。在优化配方的基础上,以BDO添加量为单因素变量进行合成,得到增粘WPU,通过粘度仪和FTIR(红外光谱仪)分析产物。第二步,将PVP,WPU共混后通过静电纺丝法得到复合电纺纤维膜。采用控制溶液配比的方式,确立了过滤效率和纺丝溶液配比的关系。第三步,在上述配方基础上,将甲基含氢硅油质量分数作为单因素变量,制备复合膜实验组,用PMsensor(空气颗粒激光传感器)测试其过滤空气颗粒分数,考察了甲基含氢硅油质量分数对空气过滤效率的影响。实验结果表明:反应时间120min,反应温度75℃条件下,配方:mppg=1000g,mTdi=174g,mDMPA=49g,m BDO=4.2g,制备得到的WPU可以用于静电纺丝;当参数为电压14kv,喷口半径0.8mm,进液速率50μL/h条件下,PVP质量分数量7%,水性聚氨酯质量分数6%,静电纺丝时间2.5h,其空气过滤效率达到79%。通过SEM(扫描电子显微镜)和PMsensor测试复合膜过滤效率得出结论,随着PVP添加量的增大,纺丝直径显著增大,过滤效率上升;随着WPU添加量的增大,复合膜孔隙率显著增大,过滤效率下降。同样条件下,PVP质量分数量7%,水性聚氨酯质量分数6%,甲基含氢硅油质量分数14%,静电纺丝时间2.5h,其过滤空气过滤效率达到83%。通过SEM(扫描电子显微镜)和PMsensor测试复合膜过滤效率得出结论,随着甲基含氢硅油添加量的增大,纤维之间的接触点粘连情况逐渐减少,宏观表面缺陷减少,过滤效率上升,通过FTIR分析得出甲基含氢硅油可使纤维膜耐水性得到提升。
[Abstract]:As a kind of non-toxic environmental protection material, the polymer material suitable for preparing air filtration membrane by electrospinning has become a hot research topic. Compared with the traditional material, the preparation of WPU filter membrane is more safe than that of traditional material. The low viscosity limits its application in electrospinning field. In view of the low viscosity of WPU, the PVP (polyvinylpyrrolidone) / WPU composite filtration membrane was prepared by the method of electrospinning. In the first step, the optimized formula is calculated by theoretical calculation. The matrix equation with BDO (1k4- butanediol) content as unknown number is solved by MATLAB software, and the Prediction IR (prediction infrared spectra of synthesized WPU products are obtained by Chembio3d software. Based on the optimization of the formula, the viscosity increasing WPU, was synthesized with the addition of BDO as a single factor variable, and the products were analyzed by viscometer and FTIR (Infrared Spectrometer). In the second step, the composite electrospun fiber membrane was obtained by electrostatic spinning after blending PVP,WPU. The relationship between the filtration efficiency and the ratio of spinning solution was established by controlling the proportion of the solution. In the third step, on the basis of the above formula, the mass fraction of methyl-hydrogen-containing silicone oil was used as a single factor variable to prepare the composite membrane experimental group. The filter air particle fraction was measured by PMsensor (Air Particle Laser Sensor). The effect of mass fraction of methyl hydrosilicon oil on air filtration efficiency was investigated. The experimental results show that the WPU prepared by mppg=1000g,mTdi=174g,mDMPA=49g,m BDO=4.2g, can be used for electrostatic spinning under the conditions of 120 min reaction time and 75 鈩，
本文编号：2332813
[Abstract]:As a kind of non-toxic environmental protection material, the polymer material suitable for preparing air filtration membrane by electrospinning has become a hot research topic. Compared with the traditional material, the preparation of WPU filter membrane is more safe than that of traditional material. The low viscosity limits its application in electrospinning field. In view of the low viscosity of WPU, the PVP (polyvinylpyrrolidone) / WPU composite filtration membrane was prepared by the method of electrospinning. In the first step, the optimized formula is calculated by theoretical calculation. The matrix equation with BDO (1k4- butanediol) content as unknown number is solved by MATLAB software, and the Prediction IR (prediction infrared spectra of synthesized WPU products are obtained by Chembio3d software. Based on the optimization of the formula, the viscosity increasing WPU, was synthesized with the addition of BDO as a single factor variable, and the products were analyzed by viscometer and FTIR (Infrared Spectrometer). In the second step, the composite electrospun fiber membrane was obtained by electrostatic spinning after blending PVP,WPU. The relationship between the filtration efficiency and the ratio of spinning solution was established by controlling the proportion of the solution. In the third step, on the basis of the above formula, the mass fraction of methyl-hydrogen-containing silicone oil was used as a single factor variable to prepare the composite membrane experimental group. The filter air particle fraction was measured by PMsensor (Air Particle Laser Sensor). The effect of mass fraction of methyl hydrosilicon oil on air filtration efficiency was investigated. The experimental results show that the WPU prepared by mppg=1000g,mTdi=174g,mDMPA=49g,m BDO=4.2g, can be used for electrostatic spinning under the conditions of 120 min reaction time and 75 鈩，
本文编号：2332813
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