细菌纤维素基光响应浸润性调控材料的制备及表征  

Preparation and Characterization of Bacterial Cellulose Based Light Response Infiltrating Control Material

作　　者：许云华[1] 马波[1] 孙汴京 XU Yunhua;MA Bo;SUN Bianjing(School of Marine Port,Lianyungang Normal College,Lianyungang 222006,China;Institute of Chemicobiology and Functional Materials,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]连云港师范高等专科学校海洋港口学院,江苏连云港222006 [2]南京理工大学化学生物功能材料研究所,江苏南京210094

出　　处：《江苏海洋大学学报（自然科学版）》2023年第2期73-78,共6页Journal of Jiangsu Ocean University:Natural Science Edition

基　　金：国家自然科学基金面上项目(51873087)。

摘　　要：以细菌纤维素(bacterial cellulose,BC)为基材,采用高碘酸钠(NaIO 4)氧化法制备醛基化细菌纤维素(dialdehyde BC,DBC),通过席夫碱反应在纤维素表面引入4-氨基偶氮苯单体(4-aminoazobenzenes,AAB)制备细菌纤维素基光响应浸润性调控材料。利用X射线衍射(XRD)、傅里叶红外光谱(FTIR)、扫描电子显微镜(SEM)、EDS能谱和X射线光电子能谱(XPS)等对材料进行形貌和结构表征。SEM-EDS结果显示,AAB均匀分布在疏松多孔的纤维表面;AAB-DBC材料的水接触角为91°,显示了良好的疏水特性;在365 nm的紫外光照射下,表面的疏水性向亲水性转变,其表面的水接触角减小到了75°;将材料置于黑暗条件下,水接触角又恢复到了91°;通过交替光照和暗处放置两个过程,可实现材料在亲、疏水之间的可逆转变。这在液体智能传输和可控微流体器件等方面具有一定的应用前景。Based on the bacterial cellulose(BC)as the backing materials,sodium periodate oxidation is used to preparation dialdehyde bacterial cellulose(DBC).Through the reaction of the Schiff base,4-aminoazobenzenes(AAB)is introduced onto the surface of BC fibers.X-ray diffraction(XRD),Fourier transform infrared(FTIR)spectroscopy,scanning electron microscope(SEM),energy disperse spectroscopy(EDS)and X-ray photoelectron spectrometer(XPS),and contact angle measurement instrument are used to test the characterization and performance of BC based materials.The results of SEM-EDS show that the AAB can be introduced onto the loose and porous surface of the fibers.The water contact angle of AAB-DBC is 91°,showing good hydrophobic characteristics.The surface hydrophobicity changes to hydrophilicity under UV irradiation at 365 nm,and the water contact angle decreases to 75°.The water contact angle can be returned to 91°under dark conditions.The reversible transformation between hydrophobic and hydrophilic is realized,which has good application prospect in the liquid intelligent transport and controllable microfluidic device.

关 键 词：细菌纤维素 光响应 氨基偶氮苯 接触角 

分 类 号：TQ35[化学工程]