Process for manufacturing a composite membrane comprising a porous support and a polymeric separation layer having acidic or basic groups comprising the steps of: (i) applying a composition to a porous support; and (ii) curing the composition to form the polymeric separation layer thereon; wherein the composition comprises the components (a) a compound having one ethylenically unsaturated group; and (b) a crosslinking agent having an acrylamide group; and wherein the curing is achieved by irradiating the composition for less than 30 seconds. The membranes are useful in reverse electrodialysis e.g. for generating blue energy and have good resistance to deterioration, even under hot and high pH conditions.
A membrane obtainable from curing a composition comprising:
(i) a curable compound comprising at least two (meth)acrylic groups and a sulphonic acid group and having a molecular weight which satisfies the equation:
MW<(300+300n)
wherein:
MW is the molecular weight of the said curable compound; and
n has a value of 1, 2, 3 or 4 and is the number of sulphonic acid groups present in the said curable compound;
and optionally (ii) a curable compound having one ethylenically unsaturated group; wherein the molar fraction of curable compounds comprising at least two (meth)acrylic groups, relative to the total number of moles of curable compounds present in the composition, is at least 0.25.
一种可通过固化由以下成分组成的组合物而获得的膜
(i) 由至少两个(甲基)丙烯酸基团和一个磺酸基团组成的可固化化合物,其分子量满足等式:
MW<(300+300n)
其中
MW 是所述可固化化合物的分子量;以及
n 的值为 1、2、3 或 4,是存在于所述可固化化合物中的磺酸基团的数目;
和可选的 (ii) 具有一个乙烯不饱和基团的可固化化合物;其中包含至少两个(甲基)丙烯酸基团的可固化化合物摩尔分数相对于组合物中存在的可固化化合物摩尔总数至少为 0.25。
Ion exchange membranes
申请人:Fujifilm Manufacturing Europe B.V.
公开号:US10464058B2
公开(公告)日:2019-11-05
A composite ion exchange membrane comprising a cationically-charged membrane and an oppositely charged compound covalently bound thereto, the composite ion exchange membrane having: (i) a zeta-potential lower than −8 mV; and (ii) an effective charge lower than 20 μmol/m2.
A process for preparing an ion-exchange membrane having a textured surface profile comprising the steps (i) and (ii): (i) screen-printing a radiation-curable composition onto a membrane in a patterned manner; and (ii) irradiating and thereby curing the printed, radiation-curable composition; wherein the radiation-curable composition has a viscosity of at least 30 Pa·s when measured at a shear rate of 0.1 s−1 at 20° C.
一种制备具有纹理表面轮廓的离子交换膜的工艺,包括步骤(i)和(ii):(i)以图案化方式在膜上丝网印刷辐射固化组合物;以及(ii)辐照从而固化印刷的辐射固化组合物;其中辐射固化组合物在 20° C 下以 0.1 s-1 的剪切速率测量时具有至少 30 Pa-s 的粘度。
Search for and establishment of the structure of certain products of the metbolism of 1,4-di(β-bromopropionyl)-hexahydrodiazepine
作者:E. G. Tikhonoya、N. G. Oblapenko、L. F. Linberg、L. M. Fonstein、T. S. Safonova