Davletbaeva Ilsiya M, Sazonov Oleg O, Dulmaev Sergey E, Klinov Alexander V, Fazlyev Azat R, Davletbaev Ruslan S, Efimov Sergey V, Klochkov Vladimir V
Technology of Synthetic Rubber Department, Kazan National Research Technological University, 68 Karl Marx str., Kazan 420015, Russia.
Department of Chemical Process Engineering, Kazan National Research Technological University, 68 Karl Marx str., Kazan 420015, Russia.
Membranes (Basel). 2022 Dec 9;12(12):1247. doi: 10.3390/membranes12121247.
On the basis of aminoethers of boric acid (AEBA), polyurethane vapor-permeable and pervaporative membranes were obtained. AEBAs, the structure of which is modified by bulk adducts (EM) of diphenylol propane diglycidyl ether and ethanolamine, were studied. It turned out that AEBA exists in the form of clusters, and the use of EM as a result of partial destruction of associative interactions leads to a significant decrease in the size of AEBA-EM particles and their viscosity compared to unmodified AEBA. The introduction of EM into the composition of AEBA leads to a threefold increase in the vapor permeability of polyurethanes obtained on their basis. The observed effect is explained by the fact that a decrease in the size of clusters leads to loosening of their dense packing. Areas of clustering due to associative interactions of hydroxyl groups, together with the hydrophilic nature of polyoxyethylene glycol, create channels through which water molecules can penetrate. The increase in vapor permeability is accompanied by a multiple increase in the permeability coefficients in the pervaporative dehydration of isopropanol.
基于硼酸氨基醚（AEBA），制备了聚氨酯透气和渗透汽化膜。研究了结构由二酚基丙烷二缩水甘油醚与乙醇胺的本体加合物（EM）改性的AEBA。结果表明，AEBA以簇的形式存在，与未改性的AEBA相比，由于缔合相互作用的部分破坏而使用EM导致AEBA - EM颗粒尺寸及其粘度显著降低。将EM引入AEBA的组成中会使基于它们制备的聚氨酯的透气率提高两倍。观察到的效果可以解释为簇尺寸的减小导致其紧密堆积的松散。由于羟基的缔合相互作用以及聚乙二醇的亲水性而形成的簇区域形成了水分子可以穿透的通道。透气率的增加伴随着异丙醇渗透汽化脱水过程中渗透系数的成倍增加。
