A durable and flexible silicone-based backcoating (halogen free) is applied to the backside of an otherwise smoldering-prone and flammable fabric. When exposed to fire, cyclic siloxanes (produced by thermal decomposition of the backcoating) diffuse through the fabric in the gas phase. The following oxidation of the cyclic siloxanes forms a highly conformal and thermally stable coating that fully embeds all individual fibers and shields them from heat and oxidation. As a result, the combustion of the fabric is prevented. This is a novel fire retardant mechanism that discloses a powerful approach towards textiles and multifunctional flexible materials with combined smoldering/flaming ignition resistance and fire-barrier properties.
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http://dx.doi.org/10.1002/admi.201600617 | DOI Listing |
Chem Commun (Camb)
January 2025
Department of Applied Chemistry, Faculty of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
Self-healable, multilayered organosiloxane films were prepared thermal conversion of lamellar organosiloxane films containing poly(ethylene oxide)-polydimethylsiloxane-poly(ethylene oxide) block copolymers. The incorporation of silanolate groups enabled crack healing through dynamic siloxane equilibration. The enhanced hardness and suppressed cyclic siloxane formation resulting from the multilayered structure exhibit potential for practical applications.
View Article and Find Full Text PDFEnviron Res
February 2025
Center for Sustainable Environment Research, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea; Division of Energy & Environment Technology, KIST School, University of Science and Technology, Seoul, 02792, Republic of Korea. Electronic address:
The widespread use of personal care products (PCPs) and subsequent exposure to their volatile methylsiloxane (VMS) content are often overlooked worldwide. Moreover, regulatory measures addressing VMS levels are sparse, and research on VMS levels in PCPs is limited. Therefore in this study, 141 PCPs from Korea, one of the biggest PCP markets in the world, were extracted and analyzed for seven VMSs using gas chromatography-mass spectrometry.
View Article and Find Full Text PDFTalanta
February 2025
TU Dresden, Chair of Food Science and Food Contact Materials, Bergstr. 66, 01062, Dresden, Germany.
To date, silicone elastomers intended for food and skin contact are considered compliant as long as their weight loss during a thermal treatment (200 °C, 4 h) is below 0.5 wt%. The common assumption is that this weight loss is caused almost entirely by potentially harmful volatile siloxane oligomers.
View Article and Find Full Text PDFACS Sens
November 2024
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
BMC Oral Health
November 2024
Department of Orthodontics, School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, 110002, China.
Background: This study focused on the aging mechanism and degradation of mechanical and structural features of elastodontic appliances (EA) under artificial and intraoral aging to achieve oral myofunctional therapy with particular removable silicone elastomer devices.
Materials And Methods: EAs artificially aged in saliva with different pH values were investigated through cyclic compression testing along with characterization techniques (Scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy), and characterization analysis was also performed on clinically retrieved EAs.
Results: Artificial aging was found to have minimal effect on the structural properties of EAs, and intraorally aged samples showed perceptible micro-morphology.
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