Fe_(3)O_(4)/聚二甲基硅氧烷改性胶原海绵及其油水分离性能  

Fe_(3)O_(4)/PDMS modified collagen sponge and its oil-water separation performance

作　　者：郭晨晨 张云龙 王瑜 丁翠翠 黄六莲[1] 陈礼辉[1] 张敏[1] GUO Chenchen;ZHANG Yunlong;WANG Yu;DING Cuicui;HUANG Liulian;CHEN Lihui;ZHANG Min(College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China;College of Ecological Environment and Urban Construction,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建农林大学材料工程学院,福州350108 [2]福建工程学院生态环境与城市建设学院,福州350118

出　　处：《复合材料学报》2022年第10期4652-4663,共12页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(22178056,22078060)。

摘　　要：为发展一种原料丰富、绿色环保、易于在复杂环境中操控使用、循环使用性好的多功能油水分离用海绵材料,采用浸渍法对胶原海绵进行聚二甲基硅氧烷(PDMS)/四氧化三铁(Fe_(3)O_(4))纳米颗粒复合改性,制备了超疏水胶原基复合海绵(Fe_(3)O_(4)/PDMS-COL),表征了改性后化学结构与微观结构的变化,研究了油水分离性能。通过接触角测量可知:当胶原(COL)浓度为10 mg/mL、PDMS浓度为15vol%时,复合海绵的水接触角为150.3°。FTIR、XPS、XRD及TG测试结果表明Fe_(3)O_(4)/PDMS与胶原海绵成功发生复合,FE-SEM观察结果表明Fe_(3)O_(4)纳米粒子的加入可有效构造表面粗糙结构。海绵可吸附多种不同类型的油相如苯、正己烷、乙酸乙酯、真空泵油、花生油等,其中对乙酸乙酯的吸附量达47 g/g,且对不同油相的分离效率在99%以上。以苯为吸附物,连续循环使用20次后,海绵的接触角与磁性均未发生明显下降。海绵还可有效分离水包油乳液。在外加磁场作用下实施多种场景下的油水分离实验,Fe_(3)O_(4)/PDMS-COL表现出良好的磁操控性。此外,海绵还具有较好的阻燃性能。利用近红外光热响应性,Fe_(3)O_(4)/PDMS-COL还具备了吸附分离复杂环境中固体状油脂/水体系的潜力。In order to develop a multi-functional oil-water separation sponge that is rich in raw materials, environmentally friendly, easy to operate in complex environment, and of good reusability, superhydrophobic collagenbased composite sponge(Fe_(3)O_(4)/PDMS-COL) was prepared by impregnating collagen sponge with polydimethylsiloxane(PDMS)/ferroferric oxide nanoparticles(Fe_(3)O_(4)). The changes of chemical structure and microstructure after modification were characterized, and the oil-water separation performance was studied. According to the measurement of contact angle, when the concentration of collagen(COL) is 10 mg/mL and the concentration of PDMS is 15vol%, the water contact angle of the composite sponge reaches 150.3°. The results from FTIR, XPS, XRD and TG show that Fe_(3)O_(4)/PDMS compounds with collagen sponge successfully. FE-SEM observation shows that the addition of Fe_(3)O_(4)nanoparticles construct rough surface structures effectively. Fe_(3)O_(4)/PDMS-COL can adsorb a variety of oil phases, including benzene, n-hexane, ethyl acetate, vacuum pump oil, peanut oil, among which the adsorption capacity(47 g/g) toward ethyl acetate is the highest, meanwhile the separation efficiency towards various oil phases reaches no less than 99%. After recycling for 20 times for absorbing benzene, both of the contact angle and magnetism of the sponge do not reduce significantly. Moreover, Fe_(3)O_(4)/PDMS-COL has a desirable emulsion separation ability and can effectively separate oil-in-water emulsion. Oil-water separation experiments were carried out in various scenarios under the action of external magnetic field, demonstrating the favourable magnetic responsiveness and manipulation. In addition, Fe_(3)O_(4)/PDMS-COL exhibits a good flame retardant performance. Furthermore, Fe_(3)O_(4)/PDMS-COL possesses an excellent separation capacity toward solid oil/water system in a complex environment, due to its near infrared photothermal effect.

关 键 词：胶原 海绵 水污染物 聚二甲基硅氧烷 磁场效应-控制 光热转换 

分 类 号：TB332[一般工业技术—材料科学与工程]