超疏水亲油MTCS/mSiO_(2)/NCC气凝胶的制备与表征

Preparation and characterization of superhydrophobic oil-philic MTCS/mSiO_(2)/NCC aerogel

为了制备一种超疏水亲油材料基于纤维素可生物降解的环保特性,采用废棉制备了超疏水亲油的甲基三氯硅烷(MTCS)/mSiO_(2)/纳米微晶纤维素(NCC)气凝胶。首先将废棉打碎酸解成NCC,再用KH560对SiO_(2)进行改性,然后以NCC和mSiO_(2)为原料,制备mSiO_(2)/NCC复合气凝胶,最后以MTCS为疏水改性剂对mSiO_(2)/NCC气凝胶改性,制备成超疏水亲油的MTCS/mSiO_(2)/NCC气凝胶,并使用红外光谱仪、X射线衍射仪、扫描电子显微镜、接触角测试仪,对超疏水亲油材料的形貌、结构及表面浸润进行表征。结果表明:制备得到了一种三维多孔、结果稳定的超疏水亲油MTCS/mSiO_(2)/NCC气凝胶,静态水接触角最高达150.97°,对食用油、机油和石蜡油的最大吸油倍率分别为60.00 g/g、58.15 g/g和43.27 g/g,能够快速分离油水混合物,具备良好的超疏水亲油性能。

In order to prepare kind of superhydrophobic oil-philic material,based on the biodegradable environmental characteristics of cellulose,MTCS/mSiO_(2)/NCC aerogel was prepared using waste cotton.Firstly,the waste cotton was broken into nanocrystalline cellulose(NCC)by acid hydrolysis,and then SiO_(2)was modified with KH560.Then,NCC and mSiO_(2)were used as raw materials to prepare mSiO_(2)/NCC composite aerogel.Finally,mSiO_(2)/NCC aerogel was modified with methyl trichlorosilane(MTCS)as hydrophobic modifier.MTCS/mSiO_(2)/NCC aerogels were prepared.The morphology,structure and surface infiltration of superhydrophobic and oil-philic materials were characterized by infrared spectrometer,X-ray diffractometer,scanning electron microscope and contact angle tester.The results show that a three-dimensional porous and stable super-hydrophobic oil-philic MTCS/mSiO_(2)/NCC aerogel is obtained,with a maximum static water contact angle of 150.97°,and a maximum oil absorption rate of 60.00 g/g,58.15 g/g and 43.27 g/g for cooking oil,oil and paraffin oil,respectively,which can quickly separate oil-water mixture.It has good super hydrophobic and oil-philic properties.