原位聚合法制备聚丙烯酰胺接枝再生纤维素复合膜及其应用

(1.厦门大学材料学院,福建 厦门 361005; 2.华侨大学材料科学与工程学院,福建 厦门 361021)

再生纤维素膜; 聚丙烯酰胺; 接枝聚合; 吸水性; 膜分离

In-situ Grafting Polymerization of Acrylamide onto Regenerated Cellulose Film and Its Application
ZHANG Xiao1,YANG Le2,XIONG Xiaopeng1*

(1.College of Materials,Xiamen University,Xiamen 361005,China; 2.College of Materials Science and Engineering,Huaqiao University,Xiamen 361021,China)

regenerated cellulose film; polyacrylamide(PAM); graft polymerization; water absorption; membrane separation

DOI: 10.6043/j.issn.0438-0479.201612016

备注

为开发可再生资源纤维素的高值化功能材料,将再生纤维素膜浸泡于丙烯酰胺溶液中,以硝酸铈铵为引发剂,引发丙烯酰胺在再生纤维素上的原位接枝聚合,制备了聚丙烯酰胺接枝再生纤维素的复合膜材料.采用傅里叶红外光谱和扫描电镜对再生纤维素膜和复合膜的组成和微观结构进行表征.研究和分析了复合膜材料的力学性能,并将该复合膜应用于膜分离领域.结果表明,复合膜材料的拉伸强度达107 MPa,饱和吸水率达347%,较再生纤维素膜均有显著提高; 复合膜材料的水通量为26.4 L/(m2·h·MPa),是再生纤维素膜的2倍以上,对分离牛血清白蛋白也具有更高的截留率.因此,该复合膜在吸水、保水材料和膜分离领域具有较好的应用前景.

In order to elevate the value of regenerable resource of cellulose,regenerated cellulose film was soaked in an acrylamide aqueous solution,and then ceric ion was added to initiate the in-situ grafting polymerization of acrylamide under mild conditions through heterogeneous reaction.The composition and microstructure of films were studied and compared using Fourier transform infrared(FT-IR)spectroscopy and scanning electron microscopy(SEM).The composite film shows higher mechanical properties and water absorption abilities than the pure regenerated cellulose film,which reaches up to 107 MPa of tensile strength and 347% of saturated water absorption,respectively.Moreover,the composite film retains porous microstructure,and it exhibits higher water flux(26.4 L/(m2·h·MPa)),which is more than twice that of the regenerated cellulose film,and higher bovine serum albumin rejection rate than the regenerated cellulose film.Therefore,such a recyclable film would have great potential in water absorbing and water retaining materials and membrane separation fields.