Formylated polystyrene for the fabrication of pore selective aldehyde group functionalized honeycomb patterned porous polystyrene films

Abstract

Formylated polystyrene (PS-CHO) was synthesized by chemical modification of polystyrene (PS) for the fabrication of honeycomb patterned (HCP) porous PS films with aldehyde group functionalized pores via breath figure method under humid conditions. The incorporation of hydrophilic aldehyde group affected the hydrophobicity of PS solution and assisted the self-assembly of PS-CHO toward pore. The presence of aldehyde groups in the films were proved by the post treatment with Tollens's reagent, which results in silver decoration at pores. The morphology of the films before and after silver decoration was studied by scanning electron microscopy analysis. The pore selectively self-assembled aldehyde groups in the patterned porous films can have many applications as a reactive substrate in biomaterials and chemical moieties adhesion.

Selective Coating of SnS on the Bio‐Inspired Moth‐Eye Patterned PEDOT:PSS Polymer Films

“…Decreasing the pore size of HCP films to a nanometer is challenging. The cavity size of HCP films can be changed by controlling the experimental conditions during the BF process …”

Modified Breath Figure Methods for the Pore-Selective Functionalization of Honeycomb-Patterned Porous Polymer Films

“…Recent developments in the BF method have led to the advancement of the technique by self-assembly followed by additional treatment due to the possibility of combining organic and inorganic compounds. Therefore, the creation of new materials with tailored properties has attracted much attention and considerable literature has grown up around the fabrication of such materials via the modified BF method, summarized in Table 1 [ 70 , 97 , 98 ]. This method usually requires two steps for the pore-selective functionalization of the HCP films.…”

Ordered Honeycomb‐Pattern Membrane†

“…Hydrophilic block also has a certain ability to stabilize water droplets and improve the regularity of the membrane. [ 51‐56 ] For the hydrophilic modification of membrane materials, monomers containing hydrophilic groups are usually used for block copolymerization and end‐group substitution. [ 55,57,58 ]…”

“…Other examples of hydrophilic modification based on PS were shown in Scheme 4(C). [ 9,53,60‐64 ] When the polymers had hydrophilic groups, the membrane pores will be increased, because the hydrophilic chain segments will interact with the solvent to prevent the solvent from volatilization and reduce the temperature difference. It increases the time for the growth of water droplets.…”