采用浸没沉淀相转化法制备了纳米纤维素晶(CNC)/醋酸纤维素(CA)完全环境友好的共混膜材料，考察了在铸膜液中添加不同质量分数的 CNC 对共混膜各方面性能的影响。通过超滤装置测定了共混膜的水通量、截留率、含水率和孔隙率；通过万能试验机、环境扫描电子显微镜(SEM)、热重分析仪(TGA)对超滤膜进行了力学性能、形貌结构和热稳定分析。结果表明，随着 CNC 含量增加，共混膜的孔隙率呈增长趋势，由40.8%提高到66.4%，大孔由原来的规则圆形漏斗状变为狭长椭圆状且互相连通，水通量和拉伸强度呈先上升后减小的趋势。当 CNC 添加量为0.5%时，共混膜综合性能最优，相比纯 CA 膜，水通量提高64.7%，拉伸强度提高70%，热稳定性也得到增强。
Cellulose nanocrystal (CNC)/cellulose acetate (CA)blend environmentally friendly membranes were prepared by the immersion precipitation phase inversion process,and the effect of CNC content on the overall perfor-mance was also studied by adding different mass percentage of CNC into the casting liquid.The pure water flux,rejec-tion ratio,water content and porosity were tested in the ultrafiltration equipments.Also,the mechanical properties, morphology and thermal stability were characterized by tensile testing,scanning electron microscope (SEM)and ther-mogravimetric analysis (TGA).The results show that with the increasing of CNC contents,the porosity of the blend membranes increased from 40.8% to 66.4% and the original circular funnel holes turned into ellipse holes,as well as the pure water flux and the tensile strength were greatly improved.The blend membranes displayed the best properties when the CNC content was 0.5%.Compared with the pure CA membranes,the pure water flux was improved of 64.7%,while the tensile strength increased 70% and the thermal stability was enhanced.
参考文献
| [1] | Palsamy Kanagaraj;Sivasubramaniyan Neelakandan;Alagumalai Nagendran.Preparation, characterization and performance of cellulose acetate ultrafiltration membranes modified by charged surface modifying macromolecule[J].The Korean journal of chemical engineering,20146(6):1057-1064. |
| [2] | Arthanareeswaran G.;Srinivasan K.;Mahendran R.;Mohan D.;Rajendran M. Mohan V..Studies on cellulose acetate and sulfonated poly(ether ether ketone) blend ultrafiltration membranes[J].European Polymer Journal,20044(4):751-762. |
| [3] | Zhaoan Chen;Maicun Deng;Yong Chen;Gaohong He;Ming Wu;Junde Wang.Preparation and performance of cellulose acetate/polyethyleneimine blend microfiltration membranes and their applications[J].Journal of Membrane Science,20041/2(1/2):73-86. |
| [4] | 邱运仁;张启修.聚乙烯醇-醋酸纤维素共混超滤膜的制备与性能研究[J].现代化工,2001(10):28-31. |
| [5] | Arthanareeswaran G;Thanikaivelan P;Srinivasn K;Mohan D;Rajendran M.Synthesis, characterization and thermal studies on cellulose acetate membranes with additive[J].European Polymer Journal,20049(9):2153-2159. |
| [6] | 唐焕威;张力平;刘江;赵广杰;秦竹;孙素琴.聚醚砜/纤维素晶体共混膜材料及其超滤性能[J].高分子学报,2010(4):429-434. |
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