Synthesis and Characterization of Porous Crosslinked Copolymers for Oil Spill Sorption

Abstract

Cinnamoyloxy ethyl methacrylate (CEMA) was copolymerized with different monomer feed ratios of octadecyl acrylate (ODA) and crosslinked using azobisisobutyronitrile (AIBN) as the initiator and N,N',N"-trisacryloyl melanine (AM) or N,N',N",-trismethacryloylmelanine (MM) crosslinkers. The networks are characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). For crosslinked CEMA/ODA copolymer sol fraction values are lower when MM is used rather than AM. The thermal stability of crosslinked network increases with increasing ODA concentration and also in the presence of MM crosslinker, a consequence of higher crosslinking density. SEM results show a porous structure; micropores are formed when ODA contents increases. According to DMA results, the flexibility of the network is enhanced by incorporation of MM rather than AM. Since our crosslinked networks are both flexible and porous, they are applicable as oil sorber networks to alleviate pollution from oil spills.

Advances in the Use of Protein-Based Materials: Toward Sustainable Naturally Sourced Absorbent Materials

“…equilibrium swelling, absorption rate and diffusion efficiency, may be altered merely by changing the final structure of the material without involving any chemical processes. − Examples where the morphological structure affects the absorption efficiency are commonly foams, where the liquid absorption is dominated by capillary mechanisms. ,,,, A difference in pore sizes have also shown to affect absorption properties. , Differences in pore size and pore size distribution have resulted in materials which are suitable for different applications, e.g. pH-sensitive drug delivery systems, tissue engineering, blood, oil spills and plasma absorption, etc. ,− In addition, different coatings and different process treatments of cellulose and protein-based foams have been shown to influence the absorption of liquids with different polarities (e.g., water and/or oil). ,,, In this context, proteins combine foam stability and viscoelasticity with biocompatibility, making them outstanding in tailored foam structures. ,,− Wheat gluten foams have been evaluated for their structure, absorption and swelling properties, with absorption and water swelling of ca. 32 g/g .…”

Swelling and network parameters of crosslinked porous octadecyl acrylate copolymers as oil spill sorbers

“…Materials N,N,'N"-Trisacryloyl-melamine (MA), N,N,'N"-trismethacryloyl-melamine (MM) and cinnamoyloxy ethyl methacrylate (CEMA) were prepared and characterized as reported previously [12]. Octadecyl acrylate (ODA) was obtained from Aldrich Chemical Co., USA, and purified by washing with 5 % aqueous sodium hydroxide, dried over anhydrous CaCl 2 , and distilled under vacuum.…”

“…Soluble fractions (SFs) of crosslinked polymers were extracted with chloroform until constant weights were achieved [12,13]. The SF values were calculated as…”

“…Jang and Kim [11] performed copolymerization of styrene monomers with various long-chain alkyl acrylate monomers; acrylate monomers with long-chain alkyl groups are generally known as hydrophobic materials. Earlier publications [12,13] describe synthesis of cinnamoyloxy ethyl methacrylate (CEMA) monomer to be used in preparation via different types of chemical crosslinkers of new oil-absorbing polymers containing alkyl acrylate. In this work, swelling properties of the crosslinked copolymers and swelling parameters such as maximum oil absorbency Q max , characteristic oil sorbency Q, characteristic swelling time t s and swelling rate constant k were evaluated.…”

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“…Nanocomposites are composites in which at least one of the phase has dimensions in nano range (1-100nm). Composites are also [9][10][11].Tin oxide (SnO) finds applications in solid state gas sensor materials, oxidation catalyst and transparent conductor [12]. Carbon encapsulated tin oxide nanocomposites have been used as an anode and demonstrated high performance in sodium ion batteries [13].…”