Development of a Finishing Process for Imbuing Flame Retardancy into Materials Using Biohybrid Anchor Peptides

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(14), P. 6107 - 6107

Published: July 12, 2024

Flame retardants are commonly used to reduce fire risk in various products and environments, including textiles. While many of these additives contain harmful substances, efforts underway their usage. Current research aims minimize flame-retardant quantities enhance durability against external factors. This involves utilizing anchor peptides or material-binding (MBPs), which versatile molecules that bind strongly surfaces like MBPs can be equipped with functional molecules, e.g., additives, by chemical enzymatic bioconjugation. In this research, biohybrid flame an adapted finishing process developed. Specifically, biobased adhesion promoters, the so-called MBPs, finish textiles additives. To date, there is no for treating so a laboratory-scale based on foulard was Necessary parameters, such as take-off speed contact pressure squeezing rollers, determined experimentally. order develop process, trials designed carried out. Part testing comparison different (e.g., glass woven fabrics aramid fabrics) under conditions ratios retardants). The finished then analysed validated regarding flammability amount adhered retardants.

Language: Английский

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Estimating Octanol–Water Partition Coefficients of Novel Brominated Flame Retardants by Reversed‐Phase High‐Performance Liquid Chromatography and Computational Models

Environmental Toxicology and Chemistry, Journal Year: 2024, Volume and Issue: 43(10), P. 2105 - 2114

Published: July 23, 2024

Abstract Legacy brominated flame retardants, including polybrominated diphenyl ethers (PBDEs), have been classified as persistent organic pollutants and replaced with novel retardants (NBFRs). The octanol–water partition coefficients (log K OW ) of NBFRs computationally estimated, but the log values provided by these methods can differ 1 to 3 orders magnitude. Given importance this parameter in fate toxicity models, we indirectly measured eight their capacity factor ( k ′) on a reversed‐phase high‐performance liquid chromatography (HPLC) C18 column isocratic elution compared those estimated nine computational models. Log were obtained for 1,2‐bis(2,4,6‐tribromophenoxy) ethane, pentabromobenzene, pentabromoethylbenzene, pentabromotoluene, 2‐ethylhexyl 2,3,4,5‐tetrabromobenzoate, allyl 2,4,6‐tribromophenylether, 2,3‐dibromopropyl‐2,4,6‐tribromophenyl ether, bis(2‐ethylhexyl) tetrabromophthalate. A training set phthalates, polychlorinated biphenyls, PBDEs, halogenated benzenes chosen obtain ′–log calibration NBFRs. models KowWIN, XLogP3, EAS‐E Suite, COSMOtherm, DirectML, Abraham polyparameter linear free energy relationships all predicted compounds within order magnitude without significant bias. median that close known literature root mean square error (RMSE) = 0.224 HPLC (RMSE 0.334). Environ Toxicol Chem 2024;43:2105–2114. © 2024 SETAC

Language: Английский

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Impact of phosphonate and phosphoramidate in Si/P/triazine hybrid flame retardants on cotton flammability

Polymer Degradation and Stability, Journal Year: 2024, Volume and Issue: unknown, P. 111107 - 111107

Published: Nov. 1, 2024

Language: Английский

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Novel halogenated flame retardants in Canadian human milk from the MIREC study (2008–2011)

Chemosphere, Journal Year: 2023, Volume and Issue: 350, P. 141065 - 141065

Published: Dec. 28, 2023

Novel halogenated flame retardants (NHFRs) have been developed to replace those brominated that restricted due their persistent, bioaccumulation potential and toxicity and, therefore, it is important determine whether these replacement products are present at detectable concentrations in Canadians. NHFRs were measured human milk samples (n = 541) collected from across Canada between 2008 2011, which the first pan-Canadian dataset for chemicals milk. Among 15 eight methoxy-polybrominated diphenyl ethers (MeO-PBDEs), nine two MeO-PBDEs (6-MeO-PBDE 47 2-MeO-PBDE 68) detected a frequency of more than 9%. Despite benzene, 1,1′-(1,2-ethanediyl)bis [2,3,4,5,6-pentabromo-]/decabromodiphenylethane [DBDPE] being less frequently other observed NHFRs, its relative contribution sum was when present. The maximum ΣNHFR concentration Canadian 6930 pg g−1 lipid while ΣMeO-PBDEs 1600 lipid. While most NHFR significantly correlated with each other, no relationships maternal age, parity or pre-pregnancy BMI identified In contrast, age ΣMeO-PBDE (r 0.237, p < 0.001). similarly not related education, although found be higher women who had graduated trade schools education levels considered. detection seem align well Europe.

Language: Английский

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BDE-47-mediated cytotoxicity via autophagy blockade in 3D HepaRG spheroids cultured in alginate microcapsules

Chemico-Biological Interactions, Journal Year: 2023, Volume and Issue: 388, P. 110831 - 110831

Published: Dec. 13, 2023

Language: Английский

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Professional Development in Environmental Health for Middle School Science Teachers: A Pathway to STEM-Health Integration

Published: March 19, 2024

Despite a growing public awareness of and concern for the link between environmental pollution human health risks, there is relative dearth research on teacher perceptions including topics in K-12 classrooms. We examined impact an health-focused professional development (PD) program middle school teachers. used concurrent nested mixed methods approach to measure teachers' pre-/post-perceptions science concepts their integration into curriculum classroom practices. Our analysis revealed three primary themes: teachers (1) found PD beneficial; (2) emphasized that material promote multiple scientific connections with students; (3) had increased confidence teaching topic using monitoring tools. The findings suggest promising content area integrate order meet state standards.

Language: Английский

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Structural Design and Performance Correlation of Porous Poly(ionic liquid)S for 2-Bromophenol Adsorption

Process Safety and Environmental Protection, Journal Year: 2024, Volume and Issue: 192, P. 230 - 243

Published: Oct. 10, 2024

Language: Английский

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Removal and detoxification of pentahalogenated phenols using a photocatalytically induced enzymatic process

Heliyon, Journal Year: 2023, Volume and Issue: 9(11), P. e21738 - e21738

Published: Nov. 1, 2023

Poly-halogenated phenols generated from a range of industrial processes can find their way into rivers and ground water. Here we report on potential treatment for reducing the toxicity these aqueous pollutants using two highly toxic penta-halogenated (pentachlorophenol (PCP) pentabromophenol (PBP)) as surrogates. Solutions were passed through glass column packed with silica support fused titanium dioxide (TiO2) horseradish peroxidase (HRP) immobilized its TiO2/glass surface (HRP-Tglass). TiO2 photocatalysis was activated irradiation UVB (320 nm) which in turn HRP. Two operational flow rates (0.5 1.25 mL min-1; hydraulic retention times (HRTs) 20 8 min, respectively), tested effect time extent degradation reduction treated effluent. Microtox® used to measure substrate by-products at both rates. At highest rate, dehalogenation limited (removal 37 % chlorine 22 bromine) reaction products increased. lowest longer exposure resulted approximately 97 96 transformation PCP PBP, respectively, greater degree 65 70 substantial decrease solutions. The higher effluent rate attributed initial being more than substrates. With HRT, then further broken down less products. Additional tests (Hydra hexactinella (Hydra) Chinese Hamster Ovary (CHO) cell conducted rate. Both sensitive Microtox test, Hydra proving CHO. novelty this work is risk assessment resulting use spatially separated enzyme photooxidation system. system robust showed no efficacy over 10 h.

Language: Английский

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Environmental Inequities and Pediatric Asthma Disparities

Current Pediatrics Reports, Journal Year: 2023, Volume and Issue: 11(4), P. 253 - 266

Published: Nov. 29, 2023

Language: Английский

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