The role of radical polymerization in the production of thermoregulating microcapsules or polymers from saturated and unsaturated fatty acids

Szczotok, Anna M.; Carmona, Manuel; Kjøniksen, Anna–Lena; Rodríguez, Juan F.

doi:10.1002/app.45970

Cited by 9 publications

(6 citation statements)

References 55 publications

(92 reference statements)

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“…5. The FT-IR spectra of the NPS presented the absorption bands at 3020, 750 and 695 cm-1, attributed to aromatic C-H stretching vibration, corresponding to the polystyrene [38][39][40] and bands corresponding to Si-alkoxy and Si-OH groups at 1110-1000 and 920-850 cm -1 , respectively [31]. In addition, peaks located in 1490 and 1450 cm -1 confirmed the presence of aromatic C=C stretching vibration absorption [41].…”

Section: Physical Propertiesmentioning

confidence: 98%

Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites

Pedrajas

Franco²,

Sáenz³

et al. 2022

Applied Thermal Engineering

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Section: Physical Propertiesmentioning

confidence: 98%

Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites

Pedrajas

Franco²,

Sáenz³

et al. 2022

Applied Thermal Engineering

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“…This spectrum presents also absorption bands at 3020, 750 and 695 cm −1 , attributed to aromatic C-H stretching vibration, corresponding to the polymeric shell of poly(styrene-divinylbenzene). In addition, peaks located between 1600 and 1500 cm −1 confirmed the presence of C=C phenyl stretching [50][51][52]. In the spectrum of gypsum without NPCM, the band within at 3200-3800 cm −1 denotes asymmetric stretching band of crystalline water.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Thermoregulating gypsums by using nanoencapsulated phase change material slurry

Pedrajas

Simón

Sáenz

et al. 2022

J Therm Anal Calorim

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Thermoregulating composites were produced by using a thermoregulating slurry (NPCS) containing nanoencapsulated phase change material (NPCM) from poly(styrene-co-divinylbenzene) as shell and the commercial paraffin Rubitherm®RT27 as core material. These composites were synthesized by using the constitutive water of the slurry as setting water and changing the NPCM/Hemihydrate (NPCM/Hem) mass ratio within 0.0–0.41. It was found that nanoparticles were uniformly dispersed into the gypsum, and the gypsum crystal morphology was tuned by the addition of the slurry. Attending to the thermal properties, these materials can work either as insulating or thermal energy storage materials, decreasing the thermal conductivity up to ~ 50%, whereas the thermal energy storage (TES) capacity is enlarged in a ~ 140%, respect to the pure gypsum, when the maximum NPCM/Hem mass ratio was used. This composite had a latent heat of 30.2 J g−1 and a heat capacity of equivalent 3.5 J g−1 K−1. Composites from a NPCM/Hem mass ratio up to 0.15 satisfied European mechanical standard EN 13,279–1 for gypsum binders and gypsum plasters and all of them, presented a bulk density higher than 0.60 g cm−3. The addition of a 41% in mass of nanocapsules allowed to save 13.5 kWh m−3 and, reducing the CO2 emissions up to 3.4 kg of CO2 per operating cycle. The use of this new material would lead to significant energy and economic savings, as well as a considerable reduction in the emission of polluting gases into the atmosphere.

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“…Some of the crosslinkers previously described in the literature are ethylene glycol dimethacrylate (EGDMA) [17][18][19], N,N-methylenebisacrylamide (NNMBA) [20], or cyclodextrin [21]. However, the most common crosslinker for styrene-based particles is divinylbenzene (DVB) [22][23][24][25]. For that reason, DVB was selected in this work.…”

Section: Introductionmentioning

confidence: 99%

Crosslinked Bifunctional Particles for the Removal of Bilirubin in Hyperbilirubinemia Cases

et al. 2023

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This work describes the development of styrene-divinylbenzene (St-DVB) particles with polyethylene glycol methacrylate (PEGMA) and/or glycidyl methacrylate (GMA) brushes for the removal of bilirubin from blood in haemodialyzed patients. Bovine serum albumin (BSA) was immobilized onto the particles using ethyl lactate as a biocompatible solvent, which allowed the immobilization of up to 2 mg BSA/g of particles. The presence of albumin on the particles increased their capacity for bilirubin removal from phosphate-buffered saline (PBS) by 43% compared to particles without albumin. The particles were tested in plasma, finding that St-DVB-GMA-PEGMA particles that had been wetted in ethyl lactate with BSA reduced the concentration of bilirubin in plasma by 53% in less than 30 min. This effect was not observed in particles without BSA. Therefore, the presence of albumin on the particles enabled quick and selective removal of bilirubin from plasma. Overall, the study highlights the potential use of St-DVB particles with PEGMA and/or GMA brushes for bilirubin removal in haemodialyzed patients. The immobilization of albumin onto the particles using ethyl lactate increased their capacity for bilirubin removal and enabled quick and selective removal from plasma.

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The role of radical polymerization in the production of thermoregulating microcapsules or polymers from saturated and unsaturated fatty acids

Cited by 9 publications

References 55 publications

Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites

Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites

Thermoregulating gypsums by using nanoencapsulated phase change material slurry

Crosslinked Bifunctional Particles for the Removal of Bilirubin in Hyperbilirubinemia Cases

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