講座題目：過濾法從水中分離乳化油滴或乙醇和一種堅固且透明的超雙疏涂料

報 告 人：劉國軍

時 　 間：2019年11月25日(周一)15:00-17:00

地 　 點：中關(guān)村校區(qū)求是樓426室

主辦單位：研究生院、材料學院

報名方式：登錄北京理工大學微信企業(yè)號---第二課堂---課程報名中選擇“【百家大講堂】第285期：過濾法從水中分離乳化油滴或乙醇和一種堅固且透明的超雙疏涂料”

【主講人簡介】

  Guojun Liu教授目前于加拿大女王大學（Queen’s University）化學系 擔任加拿大材料科學Tier 1 首席科學家，是世界著名高分子材料科學家。近年來，他開創(chuàng)性地提出了由嵌段共聚物和其他聚合物構(gòu)成的具有納米和微結(jié)構(gòu)的功能性高分子材料，多種產(chǎn)品已經(jīng)實現(xiàn)工業(yè)化生產(chǎn)。Guojun Liu 教授在嵌段共聚物自組裝領(lǐng)域，和聚合物納米結(jié)構(gòu)材料方面均 做出了突出貢獻，迄今已發(fā)表了論文200余篇，同時著有2本書和10本書部分章節(jié)，共被引用達8000多次，其H指數(shù)為 51。

Professor Guojun Liu, Tier I Canada Research Chair in Materials Science at Queen’s University, is a pioneer and world leader in the field of polymeric materials science. He made pioneering contributions to polymer self-assembly. In particular, he has led the development of nano- and micro-structured materials constructed from block copolymers and other polymers, and developed multiple industrial products. Professor Liu has been instrumental in advancing block copolymer nanoscience and polymeric nanostructured materials, and his work has resulted in more than 200 peer-reviewed publications, 2 books, and 10 book chapters, with a total citation over 8000 times and an H-index of 51. 

【講座信息】

  眾所周知，在使用超疏水多孔過濾膜從水中分離油的過程中，一旦油滴小于過濾孔，就很難分離出乳化的油滴。而同時，傳統(tǒng)的過濾分離方法很難將與水混溶的溶劑（例如乙醇）與水進行分離。在本次報告中，將討論通過Janus過濾膜的方法，實現(xiàn)乳化油與水的高通量分離。該過濾膜可以使乳化的油滴聚集，然后選擇性地從水中分離出聚集的油相。基于同一原理，該濾膜可以通過過濾的方法從水中高效地分離乙醇。
  目前，防油和防水的超雙疏涂料的制備通常涉及使用全氟化合物，但是現(xiàn)在許多國家都禁止使用全氟化合物，并且其涂層還缺乏耐磨性和光學清晰度。在本次報告中，還將展示我們發(fā)明的一種超雙疏NP-GLIDE透明涂料，該涂料在其基質(zhì)中包含有納米尺寸的超雙疏區(qū)域，并且使用更加便宜環(huán)保的聚二甲基硅氧烷作為原料。此外，其硬度可超過9H，耐鋼棉磨損，同時具有透明性和柔韌性。

During the separation of oil from water using superhydrophobic large-pore filters, the separation of emulsified oil is impossible once the oil droplets are smaller than the filter pores. The separation of solvents such as ethanol that is miscible with water by filtration is not known. In this talk, the high-flux separation of emulsified oil from water using a Janus filter that coalesces emulsified oil droplets and then separates selectively the coalesced oil from water will be discussed, together with the separation of ethanol from water by filtration.
 

The preparation of oil- and water-repellent omniphobic coatings normally involves the use of perfluorinated agents, which are banned in many countries. The coatings further suffer from lack of wear resistance and optical clarity.  In this talk, I also will discuss our invention - transparent omniphobic NP-GLIDE coatings, which contain in their matrices nanometer-sized pools of a grafted lubricating ingredient for de-wetting enablement, using much cheaper and environmentally more friendly poly(dimethyl siloxane).