CaAlg/CMWCNT复合水凝胶纳滤膜的制备及染料截留∗

摘要

Calcium alginate/arboxyl multi-walled carbon nanotubes (CaAlg/CMWCNT)composite hydrogel nano-filtration membranes were prepared.The mechanical properties,anti-fouling properties and dye rej ection of the CaAlg/CMWCNT nano-filtration membrane were investigated.The results showed that the tensile strength increased first and then decreased in the wet state with the increase of CMWCNT content.When the proportion of CMWCNT in sodium alginate was 1 wt% the maximal tensile strength was reached,with a value of 1.83 MPa.The protein flux of CaAlg/CMWCNT composite filtration membrane was 97.3% of pure water flux,indicating that the membrane had excellent anti-fouling performance.The rej ection of the brilliant blue and Congo red reached over 9 9% with a flux of 1 9 .5 6 L/(m2 .h).%制备了海藻酸钙/羧基化多壁碳纳米管(CaAlg/CMWCNT)复合水凝胶纳滤膜，测试了其力学性能、抗污染及染料截留性能.随着CMWCNT含量的增加，湿态CaAlg/CMWCNT过滤膜的拉伸断裂强度先增大后减小，在CMWCNT含量为海藻酸钠质量的1％(质量分数)时达到最大值1．83 MPa.CaAlg/CMWCNT过滤膜具有良好的抗污染性能，对染料亮蓝和刚果红的截留率达到99％以上，通量为19．56 L/(m2.h).