木质素复合细菌纤维素材料的制备及其吸油性能研究

Preparation of Lignin Composite Bacterial Cellulose Material and Its Oil Absorption Properties Research

摘要:

为制备低成本且绿色环保的新型吸 油材料，本文以细菌纤维素（BC）为基质，脱碱木质素(DL)为疏水改性剂，通过低温浸渍法制备木质素复合细菌纤维素材料（BC-DL）；考察了原料预处理、反应时间、温度以及物料比等对BC-DL疏水及吸油性能的影响。利用FTIR、XPS、SEM、BET、接触角仪对材料的化学结构及微观形貌进行表征。结果表明，与改性前相比，DL改性后BC的比表面积由33.15 m2/g提升至71.09 m2/g，水接触角由未改性BC的19.5°增大到116.8°。吸油实验结果显示，BC-DL对花生油、柴油、真空泵废油的吸油量（OCA）分别为34.8 g/g、33.7 g/g、34.6 g/g；在经过8次循环后，OCA保留在19.1 g/g、18.3 g/g和18.8 g/g，BC-DL对三种油品均有良好的吸附性能和循环利用性。

Abstract:

In order to prepare a new low-cost and environmentally oil-absorbing material, we use bacterial cellulose (BC) as the matrix and dealkalized lignin (DL) as the hydrophobic modifier to prepare lignin-composite bacterial cellulose (BC-DL) materials by low-temperature infiltration method. The influence of process conditions such as raw material pretreatment, reaction time, temperature and material ratio on the hydrophobicity and oil absorption properties of BC-DL were explored. FTIR, XPS, SEM, BET, contact angle meter were used to characterize the chemical structure and microscopic morphology of materials. The specific surface area of BC modified by DL increased from 33.15 m2/g to 71.09 m2/g, and the water contact angle increased from 19.5° to 116.8°. The results of the oil absorption experiment showed that the saturated adsorption capacity (OCA) of BC-DL on peanut oil, diesel oil, and vacuum pump waste oil were 34.8 g/g, 33.7 g/g and 34.6 g/g, respectively; OCA still remained in 19.1 g/g, 18.3 g/g and 18.8 g/g after 8 cycles, which demonstrates that BC-DL has good adsorption performance and recyclability for the three oils.