Two-step syneretic formation of highly porous morphology during copolymerization of hydroxyethyl methacrylate and ethylene glycol dimethylacrylate

Paljevac, Muzafera; Krajnc, Peter; Hanková, Libuše; Holub, Ladislav; Droumaguet, Benjamin Le; Grande, Daniel; Jeřábek, Karel

doi:10.1016/j.mtcomm.2016.02.004

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…The authors investigated the effect of the solvent amount on the size and polydispersity of polymer particles, as well as the morphology and porosity of the synthesized particles. EGDMA is most commonly used as a crosslinker for methacrylate-based polymer particles [51][52][53] . Some other polyvinyl compounds, such as trimethylolpropan trimethacrylate 54 , 2-oxypropyl-1,3dimethacrylate 55 , and 2,3-dihydroxybutyl-1,4-dimethacrylate 56 have been also successfully used.…”

Section: Polyhema-based Drug Carriersmentioning

confidence: 99%

Hydrogels in Biomedicine: Granular Controlled Release Systems Based on 2-Hydroxyethyl Methacrylate Copolymers. A Review

Semenyuk,

Dudok,

Skorokhoda

2024

ChChT

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The article analyzes and summarizes the latest achievements in the field of polymer systems for controlled release devices based on hydrogel materials. Possible directions of drug delivery are presented, including the use of granular hydrogels, which work on the principle of drug sorption − release in the body. The research on the synthesis regularities, structure, properties, and prospects for the use of granular hydrogels based on 2-hydroxyethyl methacrylate (HEMA) and its copolymers, in particular with polyvinylpyrrolidone (PVP), as systems for the controlled release of substances, in particular, drugs, is analyzed.

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Section: Polyhema-based Drug Carriersmentioning

confidence: 99%

Hydrogels in Biomedicine: Granular Controlled Release Systems Based on 2-Hydroxyethyl Methacrylate Copolymers. A Review

Semenyuk,

Dudok,

Skorokhoda

2024

ChChT

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“…Since then our group contributed to a number of other papers illustrating the performance of palladium, palladium-platinum and palladium-gold catalysts in the DS with and without halide ions as promoters [31][32][33][34][35][36][37]. Among crosslinked resins "solvothermal" poly-divinylbenzene [38] recently emerged as the first representative of a new class of porous polymers, including also acrylic resins [39]. It has permanent mesopores with diameters up to several tens of nm, relatively high pore volumes (up to almost 2 cm 3 •g −1 ) and practically no permanent micropores.…”

Section: Introductionmentioning

confidence: 99%

“…These features apparently arise from the high nominal cross-linking degree and the high dilution of the monomer in the polymerization mixture [41], which favors the chain growth with respect to cross-linking and the switch from macroto microsyneresis as the mechanism of phase separation [42]. As the result the pore system of this kind of pDVB, which will be hereafter referred to as mesoporous (µ-pDVB), can be described as interconnected cavities crossing a continuous polymer framework rather than void spaces between partially aggregated polymer lumps ( Figure 2), as in conventional macroreticular resins [39,40,42].…”

Section: Introductionmentioning

confidence: 99%

“…continuous polymer framework rather than void spaces between partially aggregated polymer lumps ( Figure 2), as in conventional macroreticular resins [39,40,42]. Interestingly, µ-pDVB can be sulfonated with retention of its morphology to give a very useful ion-exchange resin (µS-pDVB) with pore features comparable to those of µ-pDVB [40,43].…”

Section: Introductionmentioning

confidence: 99%

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Direct Synthesis of Hydrogen Peroxide under Semi-Batch Conditions over Un-Promoted Palladium Catalysts Supported by Ion-Exchange Sulfonated Resins: Effects of the Support Morphology

et al. 2019

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Palladium catalysts supported by a mesoporous form of sulfonated poly-divinylbenzene, Pd/µS-pDVB10 (1%, w/w) and Pd/µS-pDVB35 (3.6% w/w), were applied to the direct synthesis of hydrogen peroxide from dihydrogen and dioxygen. The reaction was carried for 4 h out in a semibatch reactor with continuous feed of the gas mixture (H2/O2 = 1/24, v/v; total flow rate 25 mL·min−1), at 25 °C and 101 kPa. The catalytic performances were compared with those of a commercial egg-shell Pd/C catalyst (1%, w/w) and of a palladium catalyst supported by a macroreticular sulfonated ion-exchange resin, Pd/mS-pSDVB10 (1%, w/w). Pd/µS-pDVB10 and Pd/C showed the highest specific activity (H2 consumption rate of about 75–80 h−1), but the resin supported catalyst was much more selective (ca 50% with no promoters). The nanoparticles (NP) size was somewhat larger in Pd/µS-pDVB10, showing that either the reaction was structure insensitive or diffusion limited to some extent over Pd/C, in which the support is microporous. The open pore structure of Pd/µS-pDVB10, possibly ensuring the fast removal of H2O2 from the catalyst, could also be the cause of the relatively high selectivity of this catalyst. In summary, Pd/µS-pDVB10 was the most productive catalyst, forming ca 375 molH2O2·kgPd−1·h−1, also because it retained a constant selectivity, while the other ones underwent a more or less pronounced loss of selectivity after 80–90 min. Ageing experiments showed that for a palladium catalyst supported on sulfonated mesoporous poly-divinylbenzene storage under oxidative conditions implied some deactivation, but a lower drop in the selectivity; regeneration upon a reductive treatment or storage under strictly anaerobic conditions (dry-box) lead to an increase of the activity but to both a lower initial selectivity and a higher drop of selectivity with time.

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Compatibility versus reaction diffusion: Factors that determine the heterogeneity of polymerized adhesive networks

Fu,

Holles,

England

et al. 2024

Dental Materials

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Two-step syneretic formation of highly porous morphology during copolymerization of hydroxyethyl methacrylate and ethylene glycol dimethylacrylate

Cited by 6 publications

References 18 publications

Hydrogels in Biomedicine: Granular Controlled Release Systems Based on 2-Hydroxyethyl Methacrylate Copolymers. A Review

Hydrogels in Biomedicine: Granular Controlled Release Systems Based on 2-Hydroxyethyl Methacrylate Copolymers. A Review

Direct Synthesis of Hydrogen Peroxide under Semi-Batch Conditions over Un-Promoted Palladium Catalysts Supported by Ion-Exchange Sulfonated Resins: Effects of the Support Morphology

Compatibility versus reaction diffusion: Factors that determine the heterogeneity of polymerized adhesive networks

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