In Situ Assembly of Nanostructured Polyelectrolyte Coatings by Aqueous Phase Separation toward Outstanding Thermal Insulation and Fire Resistance

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-11-15 DOI:10.1021/acsmaterialslett.4c0204110.1021/acsmaterialslett.4c02041

Wei Luo, Ting Wang*, Xue Gou, Jie Luo, Wenli An, Zhi-Cheng Fu, Jinni Deng, Hai-Bo Zhao* and Ming-Jun Chen*,

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Abstract

Flame-retardant surface treatments effectively reduce the fire hazard of polymeric foams but are plagued by high coating thickness and deterioration of inherent thermal insulation. Constructing a nanostructure can significantly enhance the thermal insulation of coatings, but current methods usually rely on toxic solvents and harsh conditions. Herein, we present a facile and eco-friendly strategy employing a Cu²⁺-assisted aqueous phase separation (APS) strategy for the assembly of nanostructured polyelectrolyte coatings in situ. Exploiting the multiple cross-linking interactions between Cu²⁺ and the polyelectrolyte complex (PEC), the unique nanosheet (∼200 nm) structure was assembled in the PEC coating. When coated on rigid polyurethane foam (RPUF), the thermal conductivity was reduced to 28.1 from 30.0 mW/m·K. Moreover, the coated RPUF manifests a limiting oxygen index of 36% and reduces heat/smoke release (>60%). This work provides a facile and eco-friendly strategy to cast flame-retardant nanostructured coatings for materials with excellent integrated performances.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.