Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials (Northeast Forestry University), Ministry of Education, Harbin 150040, China.
Key Laboratory of Bio-based Material Science & Technology (Northeast Forestry University), Ministry of Education, Harbin 150040, China; Engineering Research Center of Advanced Wooden Materials (Northeast Forestry University), Ministry of Education, Harbin 150040, China.
J Hazard Mater. 2022 Aug 5;435:129068. doi: 10.1016/j.jhazmat.2022.129068. Epub 2022 May 4.
Frequent oil-spill accidents have posed serious threats to ecosystem balance and the efficiency of resources use. Hydrophobic adsorbents that can adsorb and recover oil without causing secondary pollution are ideal candidates for the remediation of oil contamination in water. However, these composites are inefficient for crude oil-spills cleanup because crude oil has low liquidity of at room temperature. Increasing the temperature can effectively enhance the flowability of crude oil. To achieve efficient crude-oil heating and removal in situ, wood aerogels were immersed in TiCT suspensions and then coated with polydimethylsiloxane (PDMS) to obtain a solar-heated adsorbent (PT-WA). The prepared PT-WA exhibits super-hydrophobicity (water contact angle: 154° ± 2°), mechanical robustness (withstanding 20 loading-unloading cycles under 50% strain without structural damage), strong solar absorption, and favorable photothermal-conversion capability (rising to ~85 °C within 90 s under 1.5 sun). Owing to these advantages, PT-WA is an effective adsorbent for crude oil cleanup. In addition, a 'self-heating crude oil collector' was assembled for the fast adsorption and restoration of crude oil from the water surface. This solar-assisted self-heating sorbent offers a competitive platform for the cleanup and recycling of viscous crude oil spills.
频繁的溢油事故对生态平衡和资源利用效率构成了严重威胁。能够吸附和回收油而不造成二次污染的疏油吸附剂是水环境污染修复中油污染治理的理想选择。然而，这些复合材料对于清除原油溢油并不高效，因为原油在室温下流动性低。提高温度可以有效地增强原油的流动性。为了实现原位高效的原油加热和去除，将木质气凝胶浸入 TiCT 悬浮液中，然后用聚二甲基硅氧烷（PDMS）涂覆，得到太阳能加热吸附剂（PT-WA）。制备的 PT-WA 表现出超疏水性（水接触角：154°±2°）、机械坚固性（在 50%应变下经受 20 次加载-卸载循环而无结构损坏）、强太阳能吸收和良好的光热转换能力（在 1.5 个太阳下 90 秒内上升到~85°C）。由于这些优点，PT-WA 是一种有效的原油清除吸附剂。此外，组装了一种“自加热原油收集器”，用于从水面快速吸附和回收原油。这种太阳能辅助自加热吸附剂为粘性原油溢油的清理和回收提供了一个有竞争力的平台。
