The present disclosure discloses a design method of a polymeric seawater desalination membrane based on a graph neural network, including the following steps: S1: constructing a knowledge graph of element-molecular group-molecular structure based on chemical knowledge, and constructing a molecular structure information data set; S2: obtaining related data of design and manufacture of a polymeric desalination membrane, establishing a seawater desalination membrane database, and performing characterization processing suitable for a graph neural network model with reference to analysis of the structure information data set to generate an adjacency matrix; S3: building the graph neural network; S4: outputting a design model of the polymeric seawater desalination membrane by training the graph neural network; and S5: predicting a chemical structure meeting seawater desalination membrane performance requirements for seawater desalination by using the design model of the polymeric seawater desalination membrane.

Polymeric membranes are modified via SIS to promote membrane resilience, prolong membrane lifetime, and mitigate fouling. Modified membranes include an inorganic material within an outer portion of the modified membrane and a polymeric core that remains unmodified by the inorganic material. The polymer may be removed leaving an inorganic material patterned from an initial unmodified polymeric membrane.

A process for manufacturing a porous body, includes preparing a dispersion liquid having a dispersion medium with cellulose-based nanofibers that have an average fiber diameter from 1 to 100 nm and dispersed therein, attaching the dispersion liquid to a porous support having a plurality of pores that connect with one another, removing the dispersion liquid attached to a surface of the porous support excluding an inside of pores of the porous support, and subsequently drying the porous support including the dispersion liquid in the pores of the porous support to remove the dispersion medium.

A gas separation membrane includes a first layer and a second layer that is provided at the surface on one side of the first layer and that includes a compound having gas separation ability. The average thickness of the second layer is smaller than an average thickness of the first layer. The second layer is an inkjet coating. The compound preferably includes a structure derived from PET, POM, PLA, PDMS, cellulose, or a coupling agent.

A filtration filter used for filtering a liquid chemical for lithography, provided with a polyimide resin porous membrane; a filtration method including allowing a liquid chemical for lithography to pass through the filtration filter; and a production method of a purified liquid chemical product for lithography, including filtering a liquid chemical for lithography by the filtration method.

Disclosed is a semipermeable membrane and its preparation method. The semipermeable membrane obtained has a Turing structure. The Turing structure is an ordered pattern composed of microstructures. The existence of the structure enables the semipermeable membrane of this invention to have both high water permeation flux and excellent salt retention performance, which breaks the flux limit value of the semipermeable membrane while ensuring high selective permeability of the membrane. It also has good anti-pollution properties. The preparation method of the invention can be easily integrated into the existing semipermeable membrane production line without further cost input which has far-reaching practical significance and commercial value.

Provided is a method of forming a filter module. The method includes: forming a non-pore ion-exchange membrane including: preparing a mixed solution of a polymer material and an ion-exchange material; and electrospraying the mixed solution to obtain the non-pore ion-exchange membrane; and interposing the non-pore ion-exchange membrane between a first polymer nanofiber web and a second polymer nanofiber web to form the filter module.

A composite hollow fiber membrane having improved water permeability and peel strength and a manufacturing method thereof are disclosed. The composite hollow fiber membrane includes a tubular polymer membrane having an outer surface and an inner surface, and a tubular braid disposed between the outer surface and the inner surface of the tubular polymer membrane, the tubular braid comprises a plurality of yarns, each of the yarns includes first multifilaments and second multifilaments, each of the first multifilaments includes a plurality of first monofilaments having fineness of 3 to 50 denier, and each of the second multifilaments includes a plurality of second monofilaments having fineness of 0.4 to 3 denier.

Provided are: a fouling inhibitor that is capable of effectively inhibiting fouling of porous filtration membranes use as water purification membranes or the like, that has resistance to chemicals, such as alkali used when the membrane is fouled, and that is capable of maintaining such effects sufficiently even after chemical wash; a filtration membrane provided with the inhibitor; and a method for producing the same. The inhibitor contains: (A) a copolymer having a weight average molecular weight of 10000 to 300000 and contains a MPC unit (a1) and a BMA unit (a2), wherein the ratio of (a1) to (a2) ((a1)/(a2)) by mole is 10/90 to 70/30; and (B) PVA having a saponification degree of 72 to 93 mol % and a polymerization degree of 300 to 1000, wherein the ratio of component (A) to component (B) ((A)/(B)) by mass is 25/75 to 75/25.

The present invention relates to polymer compositions (C) for the preparation of porous article, notably microporous membranes or hollow fibers. More particularly, the present invention relates to a process of preparing a porous article from a blend of at least one semi-crystalline or amorphous polymer (P) with an additive followed by a step of shaping the article and contacting the article with water to dissolve the additive and create an interconnected pore network within the shaped article.