1056 results about "Covalent organic framework" patented technology

An imaging member for ink-based digital printing having an outermost layer including a structured organic film (SOF) having a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may be multi-segment thick.

The invention provides a method for effectively preparing a high-throughput covalent organic framework (COFs) nano-filtration membrane on the basis of interfacial polymerization. The method comprisesthe following steps: sequentially applying an aqueous phase solution dissolved with polyamine monomers and an organic phase solution dissolved with polyaldehyde / polyketones monomers to the surface ofa porous carrier to carry out interfacial polymerization; diffusing the polyamine monomers in the aqueous phase solution saturated porous carrier to a water / oil interface to carry out schiff base reaction with polyaldehyde / polyketones in an organic phase, and gradually forming a covalent organic framework separating layer on the surface of the porous carrier by a conformal growth manner; and thencarrying out heat treatment on a composite membrane consisting of the separating layer and the porous carrier to enhance the binding force of the covalent organic framework separating layer and the porous carrier, and promoting crystallization and conversion of the covalent organic framework. The method not only is simple and convenient to operate and short in technological process, but also is well compatible with an existing process, thus, continuous product becomes possible, and the prepared composite membrane has high flux.

An imaging member for a xerographic liquid immersion development machine having an outermost layer including a solvent resistant structured organic film (SOF) having a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may be multi-segment thick.

A structured organic film comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may be a multi-segment thick structured organic film.

A capped structured organic film comprising a plurality of segments and a plurality of linkers arranged as a covalent organic framework, wherein the structured organic film may be a multi-segment thick structured organic film.

The invention provides a polyamide / COFs hybridized nanofiltration composite membrane. The composite membrane comprises a composite layer and a loaded porous frame material. The composite layer is a layer of polyamide compound formed by conducting polymerization reaction on piperazine and trimesoyl chloride, and the thickness is 100-500 nm. The porous frame material is SNW-1 obtained when melamine and terephthalaldehyde react, and is a compound layer with the loading amount of 0.5-3 g / m<2>. A covalent organic framework is effectively hybridized in a separation layer of the composite membrane, and more water channels are provided for the nanofiltration membrane. By means of the method, various types of COFs can be introduced onto a polyether sulfone base membrane, the water flux can reach 200 L / m<2>.h.MPa and increased by 2 times, the sodium sulfate retention rate of the nanofiltration membrane is still kept at 80% or above, and the high water flux and the high retention rate are achieved.