Chemosphere ( IF 8.1 ) Pub Date : 2023-08-12 , DOI: 10.1016/j.chemosphere.2023.139803 Suwan Cui 1 , Bohao Qi 1 , Hao Liu 1 , Xiaojun Sun 1 , Rui He 2 , Junshuai Lian 2 , Yiming Li 1 , Jinren Lu 3 , Mutai Bao 1
Rapid and efficient recovery of oil spill is the key link for oil spill remediation, and also a great challenge. Here, the organogelator-polymerized porous matrix composed of adsorbents and organogelators can provide a new strategy for solving this problem. The gelling mechanism of aluminum 12-hydroxystearate (Al HSA) to form spherical nano micelles in solvents was investigated via UV–vis, FT-IR, and XRD. A creative method for aluminum soap-lignin gelator (OTS-AL/Al HSA) syntheses was put forward through the saponification of 12-hydroxystearic acid (HSA) and lignin via epichlorohydrin (ECH) crosslinking. By adjusting the ECH content, the growth of Al HSA nanoparticles (15–40 nm) on lignin can be realized, and the accordingly increased roughness endowed gelator with better hydrophobicity (WCA of 134.6°) before octadecyltrichlorosilane (OTS) modification. Thanks to the porous structures, the gelator powder exhibited a high sorption capacity in the range of 3.5–5.2 g g−1 for oils and organic solvents. Rheological studies demonstrated high mechanical strength of gels (>1.6 × 105 pa) and the gelator still retained 70% sorption capacity after 6 gelation-distillation cycles. The gelation characteristics of OTS-AL/Al HSA were attributed to the rapid sorption of oils by lignin and the self-assembly of Al HSA nano micelles on lignin to form an aggregated network structure trapping oils, thus realizing the synergistic effect of oil sorption-gelation.
中文翻译:
纳米铝皂-木质素粉末形成相选择胶凝剂作为油/水分离的有效吸附剂
快速高效的溢油回收是溢油修复的关键环节,也是巨大的挑战。在这里,由吸附剂和有机凝胶剂组成的有机凝胶剂聚合多孔基质可以为解决这一问题提供新的策略。通过 UV-vis、FT-IR 和 XRD 研究了 12-羟基硬脂酸铝 (Al HSA) 在溶剂中形成球形纳米胶束的胶凝机制。通过12-羟基硬脂酸(HSA)与木质素经环氧氯丙烷(ECH)交联皂化,提出了一种合成铝皂-木质素胶凝剂(OTS-AL/Al HSA)的创新方法。通过调节ECH含量,可以实现Al HSA纳米粒子(15-40 nm)在木质素上的生长,相应增加的粗糙度赋予胶凝剂在十八烷基三氯硅烷(OTS)改性之前具有更好的疏水性(WCA为134.6°)。由于多孔结构,凝胶剂粉末对油和有机溶剂表现出3.5-5.2 g g -1范围内的高吸附能力。流变学研究表明,凝胶具有较高的机械强度(>1.6 × 10 5 pa),并且在6次凝胶蒸馏循环后,凝胶剂仍保留70%的吸附能力。OTS-AL/Al HSA的凝胶化特性归因于木质素对油类的快速吸附以及Al HSA纳米胶束在木质素上的自组装形成聚集的网络结构捕获油类,从而实现了油类吸附的协同效应。凝胶化。