Methods of material hydrophilization by glycidol-containing siloxanes

Abstract

A method of imparting hydrophilicity to a surface of a material, which includes providing a base material having a surface; applying and chemically fixing a siloxane oligomer represented by Chemical Formula 1 to the surface of the base material to form a siloxane-modified surface; and applying a glycidol compound represented by Chemical Formula 2 to the siloxane-modified surface; and carrying out a reaction therebetween to form an organosiloxane coating having a N,N-bis(hydroxyalkyl)aminoalkyl group: wherein R 1 , R 2 , and R 3 are the same or different and are each independently hydrogen or a C1 to C3 alkyl group, A is a single bond or a C1 to C5 alkylene group, and n ranges from 2 to 30; wherein each R is the same or different, and is as defined herein, and L is a substituted or unsubstituted C1 to C3 alkylene group.

What is claimed is: 
     
         1 . An article comprising a hydrophilically-modified surface, which comprises:
 a base material; and   an organosiloxane coating chemically fixed on a surface of the base material, wherein the organosiloxane coating comprises a reaction product of a siloxane oligomer represented by Chemical Formula 1, or a polysiloxane derived therefrom, with a glycidol compound represented by Chemical Formula 2 and comprising an N,N-bis(hydroxyalkyl)aminoalkyl group:   
       
         
           
           
               
               
           
         
         wherein in Chemical Formula 1, 
         R 1 , R 2 , and R 3  are the same or different and are each independently hydrogen or a C1 to C3 alkyl group, 
         A is a single bond or a C1 to C5 alkylene group, and 
         n ranges from 2 to 30; 
       
       
         
           
           
               
               
           
         
         wherein in Chemical Formula 2, 
         each R is the same or different, and is independently hydrogen, a C1 to C3 alkyl group, or a C1 to C3 hydroxyalkyl group, and 
         L is a substituted or unsubstituted C1 to C3 alkylene group. 
       
     
     
         2 . The article of claim  11 , wherein the base material comprises an organic material, an inorganic material, or an organic-inorganic hybrid material, and comprises a hydroxyl group, a carboxyl group, or a combination thereof on the surface. 
     
     
         3 . The article of claim  12 , wherein the base material comprises a polymer, wood, leather, glass, a metal, a metal oxide, a metal nitride, a ceramic material, or a combination thereof. 
     
     
         4 . The article of claim  11 , wherein the siloxane oligomer represented by Chemical Formula 1 is oligo(aminopropyl)ethoxysilane, oligo(aminopropyl)methosilane, oligo(aminoethyl)methoxysilane, oligo(aminoethyl)ethoxysilane, oligo(aminobutyl)ethoxysilane, oligo(aminobutyl)methosilane, oligo(aminopentyl)ethoxysilane, oligo(aminopentyl)methoxysilane, or a combination thereof. 
     
     
         5 . The article of claim  11 , wherein the glycidol compound represented by Chemical Formula 2 is oxiranylmethanol, (3-propyl-2-oxiranyl)methanol, oxiranylethanol, 2-(2-methyl-2-oxiranyl)ethanol, oxiranylpropanol, or a combination thereof. 
     
     
         6 . The article of  claim 1 , wherein the coating displays bands for a C—OH bond, a C—N bond, a Si—O—Si bond, a Si—O—C bond, and a Si—C bond in its infrared spectroscopy spectrum. 
     
     
         7 . The article of  claim 1 , wherein the surface of the article has a water contact angle of about 20° or less. 
     
     
         8 . The article of  claim 1 , wherein the article is an interior or exterior part of a home appliance, an anti-fogging glass, or a glass use in a vehicle.