Hydrogel-PTFE composite breathable film and preparation method thereof

• Main Authors: CHEN LINGEN, CHEN AOFEI, XIE XINYI, LIU PENG, HUANG HONGWEI, HUANG LU, ZHOU ZUWEI, DU YUANKAI
• Format: Patent
• Language: Chinese; English
• Published: 18.07.2023
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; SEPARATION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WORKING-UP

The invention relates to a hydrogel-PTFE composite breathable film and a preparation method thereof. The composite film is obtained by sequentially compounding a carbon nanotube layer and a polyacrylamide hydrogel layer on the upper surface of a PTFE film. The aperture of the PTFE membrane is 0.2-0.3 [mu] m, the thickness of the PTFE membrane is 0.1-0.2 mm, the thickness of the carbon nanotube layer is 0.01-0.05 mm, and the thickness of the polyacrylamide hydrogel layer is 1.0-1.5 mm. The hydrogel-PTFE composite gas-permeable membrane provided by the invention has good gas permeability, pollution resistance and salt resistance, and has a good application prospect in the fields of seawater desalination and the like. 本发明涉及一种水凝胶-PTFE复合透气膜及其制备方法，所述复合膜由PTFE膜的上表面依次复合碳纳米管层和聚丙烯酰胺水凝胶层得到。所述PTFE膜孔径为0.2-0.3μm，厚度为0.1-0.2mm，碳纳米管层厚度为0.01-0.05mm，聚丙烯酰胺水凝胶层厚度为1.0-1.5mm。本发明提供的水凝胶-PTFE复合透气膜具有良好的透气性和抗污阻盐性，在海水淡化等领域具有良好的应用前景。