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首页> 外文期刊>International Journal of Chemistry and Chemical Engineering >Synthesis and Surface Modification of Polyvinylidene fluoride (PVDF) Membrane using Chitosan and The Utilization in Indigo Textile Dyes Separation
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Synthesis and Surface Modification of Polyvinylidene fluoride (PVDF) Membrane using Chitosan and The Utilization in Indigo Textile Dyes Separation

机译：壳聚糖对聚偏二氟乙烯膜的合成与表面改性及其在靛蓝染料分离中的应用

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Has done research on the preparation of polyvinylidene fluoride membrane (PVDF) with a phase inversion method and immersion-precipitation technique using casting solution composition (PVDF/NMP/NH4Cl) % (w/w) 14.5/84/1,5 and non-solvent (H2O/C2H5OH) % (v/v) 75/25. In order to improve the hydrophilic properties and the ability in the separation of the textile dye indigo, PVDF membranes were modified by surface coating using chitosan. The results showed that the PVDF membrane surface modification process using chitosan, leads to changes in the pore structure of membrane from asymmetry (a combination of finger and sponge pore) into symmetry (dominance sponge pore). To determine the effect of chitosan concentration and method of coating to the pore size, mechanical strength, flux and rejection of PVDF membrane, vary the concentration of chitosan are superimposed, ie in the range of 0.5-2.5 % (w/v) and three methods coating, the immersion method, flux through the pore, and the combination (immersion - jetting). PVDF coated chitosan membranes produced in this study have a pore size range from 135.52 to 192.90 nm, which is 45.2% - 54.4% narrowed than before modification (247.3 nm). An increasingly PVDF membrane's ability to maintain pore size when the external load is applied, seem from the increasing value of young's modulus of PVDF membrane coated chitosan.
机译：已经完成了使用相变法和浸没沉淀法使用流延溶液组合物（PVDF / NMP / NH4Cl）％（w / w）14.5 / 84 / 1,5和非-制备聚偏二氟乙烯膜（PVDF）的研究溶剂（H2O / C2H5OH）％（v / v）75/25。为了改善亲水性和分离靛蓝染料的能力，PVDF膜通过使用壳聚糖的表面涂层进行了改性。结果表明，使用壳聚糖的PVDF膜表面改性过程导致膜的孔结构从不对称（手指和海绵孔的组合）变为对称（显性海绵孔）。为了确定壳聚糖浓度和涂覆方法对PVDF膜的孔径，机械强度，通量和截留率的影响，将壳聚糖的浓度进行叠加，即在0.5-2.5％（w / v）的范围内，并叠加3种。涂覆方法，浸入方法，通过孔的通量以及组合（浸入-喷射）。在这项研究中生产的涂有PVDF的壳聚糖膜的孔径范围为135.52至192.90 nm，比改性前（247.3 nm）缩小了45.2％-54.4％。施加外载荷时，PVDF膜保持孔尺寸的能力越来越强，这似乎是由PVDF膜包覆的壳聚糖的杨氏模量值增加所致。

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