摘要
本研究以纤维素纳米纤丝(Cellulose Nanofibril,CNF)为原料,采用冷冻干燥法和十六烷基三甲氧基(Hexadecyltrimethoxylan,HDTMS)化学气相沉积改性法制备具有低密度、高孔隙率和良好疏水性的CNF气凝胶。采用扫描电子显微镜、比表面积分析仪、接触角测试仪、傅里叶变换红外光谱仪对所制备的CNF气凝胶进行了分析表征,并对其吸油性能和可回用性能进行了研究。结果表明,CNF气凝胶具有多孔结构和较高的孔隙率,改性后的CNF气凝胶具有良好的疏水性能,其接触角值均>130°,为疏水性材料,且通过傅里叶红外光谱观察到改性后的气凝胶吸水峰消失,进一步验证了其疏水性。CNF气凝胶具有较强的吸油能力,其对机油和豆油的最大吸附容量分别为26.88 g/g和34.45 g/g,且在多次重复利用后,对机油和豆油仍保持较高的吸附能力,具有良好的可回用性能。
Cellulose Nanofibrils(CNFs)were used as the raw materials in this study,the aerogels were prepared by hexadecyl trimethoxy(HDTMS)chemical vapor deposition(CVD)modification and freeze-drying.Scanning electron microscope,specific surface area analyzer,contact angle tester,Fourier transform infrared spectrometer were used to analyze and characterize the prepared CNF aerogel,and its oil absorption and reusability properties were studied.The results showed that CNF aerogels had porous structures and high porosity.The modified CNF aerogels had good hydrophobic properties,and their contact angle values were all>130°,which could be classified as hydrophobic materials.From the Fourier infrared spectroscopy,it was observed that the water absorption peak of the modified aerogel disappeared.CNF aerogel had strong oil absorption capacity.The maximum adsorption capacity of the modified CNF for motor oil and soybean oil was 26.88 g/g and 34.45 g/g,respectively.After using several times,it still maintained high adsorption for motor oil and soybean oil.
作者
李伟栋
和铭
刘刻峰
丁文凤
胡亚茹
杨桂花
LI Wei-dong;HE Ming;Liu Ke-feng;DING Wen-feng;HU Ya-ru;YANG Gui-hua(State Key Laboratory of Biobased Material and Green Papermaking,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)
出处
《齐鲁工业大学学报》
CAS
2021年第4期1-8,共8页
Journal of Qilu University of Technology
基金
国家自然科学基金(31770628,31901267)
山东省自然科学基金(ZR2019BC042)
山东省高等学校科技计划项目(J18KA111)
山东省大学生创新训练项目(S202010431102,S202010431056)。
关键词
纤维素纳米纤丝气凝胶
化学气相沉积
疏水性
吸油能力
可回用性
cellulose nanofibril aerogel
chemical vapor deposition
hydrophobicity
oil absorption capacity
recyclability
