Polyphenylene sulfide woven fabric for water electrolyser and manufacturing method thereof

Abstract

A surface of a fiber constituting a polyphenylene sulfide woven fabric contains a hydrophilic group and the oxygen content of the surface of the fiber is 15% by weight or more. The hydrophilic group comprises a carbon-oxygen group and a sulfur-oxygen group, the carbon-oxygen group being at least one of a carboxyl group, a carbonyl group and an aldehyde group. The content of the carbon-oxygen group is 62 to 72% of the total number of the groups in the surface of the fiber, and the content of the sulfur-oxygen group is 6 to 15% of the total number of the groups in the surface of the fiber. The polyphenylene sulfide woven fabric for water electrolysers has good hydrophilicity, high air tightness characteristics, also has characteristics of simple process, energy saving, and low environmental pollution.

1 - 14 . (canceled) 
     
     
         15 . A polyphenylene sulfide woven fabric for a water electrolyser, wherein a surface of a fiber constituting the polyphenylene sulfide woven fabric contains a hydrophilic group, oxygen content of the surface of the fiber is 15% by weight or more, the hydrophilic group comprises a carbon-oxygen group and a sulfur-oxygen group, the carbon-oxygen group is at least one of a carboxyl group, a carbonyl group and an aldehyde group, content of the carbon-oxygen group is 62 to 72% of a total number of groups in the surface of the fiber, and content of the sulfur-oxygen group is 6 to 15% of the total number of the groups in the surface of the fiber. 
     
     
         16 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein the hydrophilic group comprises a carbon-oxygen group, a hydroxyl group, a sulfur-oxygen group and an amino group, the total content of the carbon-oxygen group and the hydroxyl group is 61 to 80% of the total number of the groups in the surface of the fiber, the content of the sulfur-oxygen group is 6 to 10% of the total number of the groups in the surface of the fiber, and the content of the amino group is 2 to 10% of the total number of the groups in the surface of the fiber. 
     
     
         17 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein a total content of the carbon-oxygen group and the sulfur-oxygen group is 72 to 85% of the total number of the groups in the surface of the fiber. 
     
     
         18 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein fineness of a warp or weft constituting the polyphenylene sulfide woven fabric is 280 to 3000 dtex. 
     
     
         19 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein density of a warp constituting the polyphenylene sulfide woven fabric is 100 to 220 pieces/10 cm, and density of a weft is 60 to 180 pieces/10 cm. 
     
     
         20 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein thickness of the polyphenylene sulfide woven fabric is 0.50 to 2.00 mm. 
     
     
         21 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein gram weight of the polyphenylene sulfide woven fabric is 300 to 1000 g/m 2.    
     
     
         22 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein after a durability treatment, the water absorption speed of the polyphenylene sulfide woven fabric is 15 s or less. 
     
     
         23 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein airtightness of the polyphenylene sulfide woven fabric is 500 mm H 2 O or more. 
     
     
         24 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein the water absorption height of the polyphenylene sulfide woven fabric is 160 to 280 mm. 
     
     
         25 . The polyphenylene sulfide woven fabric according to  claim 15 , wherein, after a durability treatment, a reduction rate of the oxygen content of the surface of the fiber of the polyphenylene sulfide woven fabric is 30% or less. 
     
     
         26 . A method of manufacturing the polyphenylene sulfide woven fabric according to  claim 15 , comprising: weaving polyphenylene sulfide yarns having a fineness of 280 to 5000 dtex as warps and wefts on a gripper loom or a heavy shaft loom to obtain a gray fabric; scouring the obtained gray fabric at a temperature of 90 to 95° C. and a speed of 20 to 40 m/min, drying at a temperature of 130 to 150° C. with a cylinder dryer, and performing sulfonation in 95% concentrated sulfuric acid, or performing sulfonation, plasma treatment or ultraviolet irradiation, the sulfonation temperature being 80 to 130° C. and the sulfonation time being 6 to 12 min; and washing and drying after the sulfonation to finally obtain a finished product. 
     
     
         27 . The method according to  claim 26 , wherein the dried polyphenylene sulfide woven fabric is irradiated under ultraviolet rays at a temperature of 60 to 90° C. for 10 to 60 hours. 
     
     
         28 . The method according to  claim 26 , wherein after the dried polyphenylene sulfide woven fabric is sulfonated, plasma processing is performed at an intensity of 50-500 KW·s/m 2.    
     
     
         29 . The polyphenylene sulfide woven fabric according to  claim 18 , wherein density of a warp constituting the polyphenylene sulfide woven fabric is 100 to 220 pieces/10 cm, and density of a weft is 60 to 180 pieces/10 cm. 
     
     
         30 . The polyphenylene sulfide woven fabric according to  claim 18 , wherein thickness of the polyphenylene sulfide woven fabric is 0.50 to 2.00 mm. 
     
     
         31 . The polyphenylene sulfide woven fabric according to  claim 18 , wherein gram weight of the polyphenylene sulfide woven fabric is 300 to 1000 g/m 2 . 
     
     
         32 . The polyphenylene sulfide woven fabric according to  claim 16 , wherein after a durability treatment, the water absorption speed of the polyphenylene sulfide woven fabric is 15 s or less. 
     
     
         33 . The polyphenylene sulfide woven fabric according to  claim 16 , wherein airtightness of the polyphenylene sulfide woven fabric is 500 mm H 2 O or more. 
     
     
         34 . The polyphenylene sulfide woven fabric according to  claim 16 , wherein the water absorption height of the polyphenylene sulfide woven fabric is 160 to 280 mm.