###### Abstract  
In this study, we used amines electrolyte solution with layer-by-layer (LbL) technique to modify and increase the CO\({}_{2}\) adsorption capacity of highly porous polymer from high internal phase emulsion template polymer. This perspective presents the extraordinary versatility of emulsion templating polymerization, which has emerged with the growing numbers of HIPE systems and modification. In this study, we used polyHIPE prepared from styrene (S) and divinylbenzene (DVB) with varying ratios; 80:20, 20:80, and 0:100 to improve the surface area, thermal properties, and mechanical properties of the materials. Furthermore, the surface of the polyHIPE was modified by LbL technique to increase the adsorption efficiency. This technique consisted of two main layers, the primary layer of poly(diallyldimethylammonium chloride) (PDADMAC) and polystyrene sulfonate (PSS) and the secondary layer, which was the CO\({}_{2}\) adsorbing layer, of polyethylene imine (PEI) or tetraethylene pentamine (TEPA). Poly(S/DVB)HIPE modified by PEI terminated as the secondary coating showed the highest CO\({}_{2}\) adsorption capacity, with up to 42% (from 0.71 to 1.01 mmol/g). The amine-multilayered modified material still possessed an open cell structure, since the solution did not block the pore structure of the poly(S/DVB)HIPE and was suitable for being used as an adsorbent in adsorption technology. CO\({}_{2}\) adsorption; layer-by-layer (LbL) technique; polyHIPE Article  
L layer-by-layer (LbL) Surface Augmented Modification of Poly(Styrene/Divinylbenzene)High Internal Phase Emulsion for Carbon Dioxide Capture M.L.A., M.L., Ch., P., D., D.  
adsorbent for a carbon dioxide capture process by using activated carbon from biomass product (seaweed and lawn grass) as solid adsorbent [10; 11]. In addition, cryogenic distillation has also been widely used for CO\({}_{2}\) absorption. Nevertheless, there were several drawbacks for cryogenic distillation, which were stated as being costly, especially for extracting all the water [12]. To overcome these problems, porous polymer prepared by high internal phase emulsion (HIPE) was studied for the CO\({}_{2}\) adsorption application. Polymer from high internal phase emulsion (polyHIPE) has been developed as it contains highly interconnected open-cell structure with porosities, surface area, and high thermal degradation [13]. It could be prepared from an external phase (oil phase) and internal phase (aqueous phase) under mechanical stirring. Typically, the total volume of the aqueous phase exceeds 74 to 90% [14] and the material has many good properties, such as low density (less than 0.03 g/cm\({}^{2}\)), a high interconnected open cell structure, and a high surface area (up to 700 m\({}^{2}\)/g). PolyHIPE is based on the polymerization of monomers and crosslinking comonomer within the organic (continuous) phase of water-in-oil (w/o). The organic phase is less than 26% of the total volume generally consisting of monomer, surfactant, and solvent [15]. In addition, the capacity of CO\({}_{2}\) adsorption could be further improved by introducing amine groups such as tetraethylenepentamine (TEPA)/diethanolamine (DEA) [16], polyethyleneimine (PEI) [17; 18], diisopropanolamine (DIPA) [19], and piperazine (PZ) [20] onto the substrates. However, an impregnated technique inside porous can aggregate, leading to pore plugging [18] and thus eliminating the pore plugging, which occurs when using the layer-by-layer (LbL) technique. Layer-by-layer polyelectrolyte multilayers (LbL) technique for the formation of thin film is employed for its simplicity in methodology. The concept was popularized in the 1990s by [PERSON]'s group at the Universite Louis Pasteur and CNRS in France. Polycation (e.g., polyethyleneimine (PEI), tetraethylenepentamine (TEPA)), and polyanion (e.g., polystyrene sulfonate (PSS) and polyacrylic acid (PAA)) on a polyHIPE were studied.