摘要:
A microfiltration membrane is provided that includes a patterned side and an un- patterned side and a dense layer located at the patterned side of the membrane. The membrane is useful for the treatment of water and wastewater. The membrane filters 15% more water than an un-patterned membrane. According to various embodiments, the membrane is formed of a polymer casting solution. The patterned side includes projecting features having a size of 1-500μιη, which according to some embodiments include finger-like asymmetric structures. A method of preparing the microfiltration membrane is also provided that includes providing a patterned non-solvent mold, applying a casting solution to the mold, and forming a dense layer at an interface of the non-solvent mold and the casting solution. According to embodiments, the non-solvent mold is a hydrogel mold and the casting solution is a polymer casting solution.
摘要:
Die vorliegende Erfindung betrifft Formkörper umfassend eine Zusammensetzung (Z1), wobei die Zusammensetzung mindestens ein Polymer mit einer Bruchdehnung >30%, und mindestens ein poröses Metall-organisches Gerüstmaterial enthält, Verfahren zur Herstellung derartiger Formkörper sowie die Verwendung einer Zusammensetzung (Z1), enthaltend mindestens ein Polymer mit einer Bruchdehnung >30%,und mindestens ein poröses Metall-organisches Gerüstmaterial zur Herstellung einer Folie,einer Membranoder eines Laminats mit einer Wasserdampfdurchlässigkeit gemäß DIN 53122 bei 38°C/90% rel. Feuchte von größer 1000 g/(m²*d), bezogen auf eine Foliendicke von 10µm.
摘要:
L'invention concerne une composition de solvant(s) comprenant un mélange d'au moins une molécule présentant au moins une fonction sulfoxyde et d'au moins une molécule présentant au moins une fonction amide où l'atome d'azote porte un atome d'hydrogène. L'invention concerne également l'utilisation de la composition de solvant(s)pour stabiliser des solutions polymériques. L'invention porte également sur une solution de polymères et sur une membrane de filtration et un cuir artificiel obtenu à partir de la solution de polymères.
摘要:
The present invention provides enthalpy exchanger elements (E, E') and enthalpy exchangers comprising such elements. Furthermore, the invention discloses a method for producing such enthalpy exchanger elements and enthalpy exchangers, comprising the steps of a) providing an air-permeable sheet element (1); b) laminating at least one side (1a, 1b) of the sheet element (1) with a thin polymer film (3, 4) with water vapor transmission characteristics; and c) forming the laminated sheet element (1) into a desired shape exhibiting a three-dimensional corrugation pattern (5, 5,...)·
摘要:
Polymer membranes, especially as used for water filtration processes, are effectively stabilized against detrimental effects of acids, bases and/or oxidizing agents commonly used for chemically enhanced backwash by incorporation of an oligo- or polyurethane of the formula (I) wherein k and n independently are numbers from 1 to 100, m is from the range 0-100, (X) is a block of formula (II) and (Y) is a block of the formula (III), (A) is a residue of an aliphatic or aromatic diisocyanate linker, (B) is a residue of a linear oligo- or polysiloxane containing alkanol end groups, and optionally further containing one or more aliphatic ether moieties, and (C) is an aromatic oligo- or polysulfone block; or a mixture of such oligo- or polyurethanes.
摘要:
Embodiments of the present disclosure may relate to porous polymer membranes, structures including porous polymer membranes, devices including porous polymer membranes, methods of using porous polymer membranes, methods of making porous polymer membranes, and the like.
摘要:
A process in which a catalytic cracking unit is operated to crack a hydrocarbon feedstock in a manner to enhance light olefin yields. The accompanying benzene-containing naphtha product stream is further processed through a benzene selective membrane to provide a low content benzene stream Refiners frequently operate their cracking units to optimize light olefin yields, e g, propylene, in response to needs in the petrochemical industry, and it has been discovered that units operated in this manner frequently produce naphtha containing increased amounts of benzene. The method of this invention therefore allows one to operate the unit when it is desired to optimize light olefin yields, yet at the same time produce a naphtha yield having a low benzene content. The invention is particularly useful when the cracking unit utilizes pentasil zeolites at increased concentrations to enhance light olefins yield.
摘要:
The present invention pertains to products and processes relating to compatible polymer blends comprising at least one sulfonated polymer and at least one non-sulfonated polymer. The sulfonated polymers may be produced using a number of sulfonating agents including a coordination complex of sulfur trioxide. The polymeric blended materials described herein are useful in a variety of applications, including as coatings for medical devices, protective clothing and fabric, laboratory equipment, vascular stents and shunts, absorbent materials and separation membranes, three-dimensional constructs, devices, and other uses.
摘要:
The present invention relates to conductive organic polymer gels, a process for preparing them, the use of the conductive organic polymer gels as solid electrolytes in electrochemical applications and also portable batteries, galvanic elements, accumulators or fuel cells which comprise these conductive organic polymer gels as solid electrolytes, as such. The present invention further relates to the production of nanoporous polymer foams comprising these conductive organic polymer gels.