紫外光交联的胶原/纤维素气凝胶的制备及性能  

Preparation and Characterization of Collagen-Carboxycellulose Composite Aerogel

作　　者：李双雯 崔永生 刘志 董纪 马尉然 刘硕 Li Shuangwen;Cui Yongsheng;Liu Zhi;Dong Ji;Ma Weiran;Liu Shuo(School of Materials Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China;Beijing Tieke Shougang Rail Technology Co.,Ltd.,Beijing 100000,China;School of Material Science and Engineering,Tianjin Sino-German University of Applied Sciences,Tianjin 300130,China)

机构地区：[1]北华航天工业学院材料工程学院,河北廊坊065000 [2]北京铁科首钢轨道技术股份有限公司,北京100000 [3]中德应用技术大学材料科学与工程学院,天津300130

出　　处：《工程塑料应用》2023年第8期160-165,共6页Engineering Plastics Application

基　　金：国家自然科学基金项目(52003007);天津市教委科研项目(2020KJ084);天津市津南区科技计划项目(20220110)。

摘　　要：生物质基气凝胶不仅具有传统气凝胶的优异性能,还保持了生物质出色的生物相容性、生物降解性和亲水性,具有广阔的应用前景。以酶解法制备的胶原蛋白(猪源)和羧基化纳米纤维素为原料(胶原蛋白∶羧基化纳米纤维素质量比为7∶3),利用清洁高效的紫外光(UV-365 nm)进行照射交联,成功制备了一种稳定多孔的三维气凝胶。重点研究了交联时间、交联方式对于胶原/纤维素气凝胶结构与性能的影响。从扫描电子显微镜图可以明显看出,纤维素在交联的胶原蛋白片层间形成搭接桥梁结构,有效提升了三维网络结构的稳定性。傅里叶变换红外光谱、热重分析及X射线衍射等分析手段证明短时间紫外照射(UV-2 h)可以有效提升胶原/纤维素气凝胶的性能,且不会对其微观结构产生破坏。紫外光照射交联的胶原/纤维素气凝胶表现出优异的物理特征,包括低体积密度(28.7 mg/cm3)、高孔隙率、机械稳定性(100次稳定循环)。Biomass-based aerogels not only possess the exceptional characteristics of traditional aerogels,such as high porosity and a large specific surface area,but also maintain the outstanding biocompatibility,biodegradability,and hydrophilicity of biomass.This provides them with a wide range of opportunities for application.A stable and porous three-dimensional aerogel was successfully prepared using collagen and nanocellulose as raw materials.The mass ratio of collagen to nanocellulose was 7:3,and the crosslinking process was achieved using clean and efficient ultraviolet light(UV-365 nm)irradiation.The effects of crosslinking time and method on the structure and properties of collagen/cellulose aerogel were studied in detail.It is evident from the scanning electron microscope photos that cellulose forms an overlapping bridge structure between the cross-linked collagen layers.This structure significantly enhances the stability of the three-dimensional network structures.Short-term ultraviolet irradiation(UV-2 h)can effectively enhance the performance of collagen/cellulose aerogel without compromising its microstructure.This has been demonstrated through Fourier Transform Infrared Spectroscopy,Thermogravimetric Analysis and X-ray Diffraction.The functionalized aerogels exhibit superior physical characteristics,such as low density(bulk density of 28.7 mg/cm3),high porosity,and mechanical stability(100 cycles of stable circulation).

关 键 词：胶原 羧基纤维素 紫外光交联 稳定性 弹性 

分 类 号：TQ[化学工程]