Development of a new TiO2 ultrafiltration membrane on flat ceramic support made from natural bentonite and micronized phosphate and applied for dye removal
Development of a new TiO2 ultrafiltration membrane on flat ceramic support made from natural bentonite and micronized phosphate and applied for dye removal
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DOI：
10.1016/j.ceramint.2016.10.118
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发表时间：
2017-01-01
影响因子：
5.2
通讯作者：
Alami Younssi, S.
中科院分区：
文献类型：
--
作者：
Bouazizi, A.;Breida, M.;Alami Younssi, S.
在此调查期间，一种新的超滤（UF）复合膜的基础上，陶瓷支持，确保高机械强度和低阻力的流体通道。以膨润土粉和微粉磷酸盐为原料，采用单轴压制法制备微滤载体。作为应用的热循环的函数，以获得最佳的处理条件下，监测的成型体的形态，收缩率，孔隙率和机械强度的变化。烧结膜载体的最佳条件是在950 ℃下30%的微粉化磷酸盐，导致34.06%的孔隙率和良好的机械阻力（约14.6 MPa）。所得的支持被用来开发一个二氧化钛超滤膜，通过利用旋涂技术。在扫描电子显微镜下在800 ° C下对烧结膜的视觉检查显示沉积层是均匀的并且没有结构缺陷。所得孔径经测定为约72 nm。最后，通过直接红80溶液的过滤来测试所得的UF膜。
A new ultrafiltration (UF) composite membrane was developed during this investigation, based on a ceramic support that ensures high mechanical strength and low resistance to fluid passage. Microfiltration (MF) supports were made by uniaxial pressing of bentonite powder and micronized phosphate. Changes in morphology, shrinkage, porosity and mechanical strength of the moldings were monitored as a function of applied thermal cycles in order to obtain optimal treatment conditions. Optimal conditions of sintered membrane support were of 30% of micronized phosphate at 950 degrees C leading to a porosity of 34.06% and a good mechanical resistance (14.6 MPa approx.). The resulting support was used to develop a TiO2 UF membrane by utilizing a spin-coating technique. Visual inspection of the sintered membrane at 800 degrees C under a scanning electron microscope showed that the deposited layer was homogeneous and free of structural defects. The resulting pore diameters were determined to be approximately 72 nm. Finally resulting UF membranes were tested by the filtration of Direct Red 80 solution.