摘要
以商业复印纸为基材,通过酸碱浸渍处理除去表面碳酸钙等无机物,随后利用硅烷偶联剂(1H,1H,2H,2H-全氟辛基三氯硅烷和十八烷基三氯硅烷)对其进行疏水改性,制备出价格低廉且性能稳定的疏水改性纸,以期作为纤维素基膜材料用于油水分离。傅里叶红外光谱(FT-IR)、X射线光电子能谱分析(XPS)及扫描电子显微镜(SEM)测试结果表明,硅烷偶联剂能够在数分钟之内完成复印纸的疏水改性反应,改性后的纤维素纤维结构并未发生破坏,且碳酸钙等无机物的去除能够使纤维交织的孔隙有效暴露出来。纸张性能测试结果表明,改性过程对复印纸的抗张强度、撕裂度和耐折度影响较小,透气度随着无机纳米粒子的去除而有所增加。接触角及油水分离实验证实了两种硅烷偶联剂改性后的纸张接触角均大于140°,且具有高效的油水分离能力。此外,油墨的存在并不会影响疏水改性反应的进行,改性后的油墨纸张同样具有疏水性并能够有效进行油水分离。本研究的原料复印纸来源广泛且价格低廉,改性方法简单便捷,极大拓宽了纸基材料研究外沿。
Oil and water separation membranes have been widely used in petrochemical, industrial wastewater, and food safety applications. Traditional inorganic fibre membrane materials, such as metal wires, carbon nanotubes, and inorganic oxide fibres, suffer from secondary contamination, non-recyclability, low separation efficiency, and difficulty in reuse. Cellulose is widely available, low density, biodegradable, and biocompatible, which can be used to fabricate a new generation of thin, light, high separation efficiency, and green recyclable oil and water separation membrane materials for replacing traditional inorganic fibre membrane substrates. However, the method of using cellulose fibres extracted from plants as raw material and then preparing the film by modification is not only costly and technically cumbersome, and the shape of the film is difficult to control and cannot be fabricated through the mass production. In contrast, commercial copy paper is a cellulose-rich, quantitative, and readily available material, with a fixed fibre and filler content and a uniform standard for each batch of copy paper in the preparation and moulding processes. In this study, the commercial copy paper was used as the substrate to remove inorganic substances such as calcium carbonate on the surface by the acid and alkali impregnation treatment, followed by the hydrophobic modification with silane coupling agents(1,1,2,2-tetrahydroperfluorooctylsilane and octadecyltrichlorosilane) to produce a low-cost and stable hydrophobic modified paper material, which was expected to be used as a cellulose-based membrane material for oil-water separation applications. The results of the Fourier infrared spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy showed that the silane coupling agent could complete the hydrophobic modification reaction of copy paper within a few minutes. The structure of the modified cellulose fibers was not damaged, and the removal of inorganic substances such as calcium carbonate could eff
作者
王海荣
黄琪雯
彭锋
郝翔
WANG Hairong;HUANG Qiwen;PENG Feng;HAO Xiang(Beijing Key Laboratory of Lignocellulosic Chemistry,Beijing Forestry University,Beijing 100083,China)
出处
《林业工程学报》
CSCD
北大核心
2023年第1期96-103,共8页
Journal of Forestry Engineering
基金
北京市自然科学基金项目(6214041)。
关键词
纤维素基膜材料
复印纸
硅烷偶联剂
疏水改性
油水分离
cellulose based film material
copy paper
silane coupling agent
hydrophobic modification
oil/water separation
