Cavitating substrates to boost water permeance of reverse osmosis membranes was written by Yang, Hao;Zhang, Zhe;Wang, Yong. And the article was included in Separation and Purification Technology in 2022.Name: Trimesoylchloride This article mentions the following:
Reverse osmosis membranes have been shown to achieve reliable freshwater supply by means of water desalination. Nevertheless, breaking the long-standing trade-off is a major challenge for realizing high-efficient desalination. Herein, we show that selective swelling of substrates made by a block copolymer, polysulfone-block-poly(ethylene glycol) (PSF-b-PEG), is very promising in the fabrication of high-flux reverse osmosis membranes. Polyamide layers are first formed on relatively dense PSF-b-PEG substrates by interfacial polymerization Then, the substrates are cavitated into highly porous substrates by selective swelling, which follows the mechanism of selective swelling-induced pore generation. The substrate porosity can be well tuned over a wide range via adjusting swelling duration. Selective swelling does not compromise the structural integrity and surface properties of polyamide layers atop the substrates. Importantly, the boosted porosity reduces the water transport resistance in substrates markedly, which in turn enables fast water permeation in reverse osmosis membranes. Thus, the optimal membrane shows exceptional water permeance of 50.4 L m-2 h-1 MPa-1 and a high NaCl rejection of 99.2%. Our work not only offers a novel strategy to enhance the water permeance of reverse osmosis membranes, but also demonstrates that the transport resistance of substrates also significantly influences water permeance of reverse osmosis membranes. In the experiment, the researchers used many compounds, for example, Trimesoylchloride (cas: 4422-95-1Name: Trimesoylchloride).
Trimesoylchloride (cas: 4422-95-1) belongs to organic chlorides. Organic chlorides can cause corrosion in pipelines, valves and condensers, and cause catalyst poisoning. The hydrocarbon processing industry (HPI) and others are affected by damage caused by these substances. Aryl chlorides may be prepared by the Friedel-Crafts halogenation, using chlorine and a Lewis acid catalyst.Name: Trimesoylchloride
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics