Halloysite-based aerogels by bidirectional freezing with mechanical properties, thermal insulation and flame retardancy

Fu, Meng; Chen, Wantong; Deng, Heran; Chen, Chuansheng; Zhang, Fan; Li, Binyu; Li, Xiangming

doi:10.1016/j.clay.2022.106547

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…Natural minerals used as flame-retardant coatings include montmorillonite, kaolinite, vermiculite, brucite, magnesite, wollastonite, bentonite, etc. [ 29 , 30 , 31 , 32 , 33 , 34 ]. Alkalic minerals can absorb harmful acidic gases released by flammable building materials under fire.…”

Section: Chemical Composition and Physical Micromorphology Of Flame-r...mentioning

confidence: 99%

Comprehensive Review of Recent Research Advances on Flame-Retardant Coatings for Building Materials: Chemical Ingredients, Micromorphology, and Processing Techniques

2023

Molecules

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Developing fire-retardant building materials is vital in reducing fire loss. The design and preparation of novel fire-retardant coatings merely require the adhesion of flame retardants with high fire-retardant characteristics on the surface, which is significantly more economical than adding excessive amounts of flame retardants into bulk building materials. Meanwhile, fire-retardant coating has excellent performance because it can block the self-sustaining mechanisms of heat and mass transfer over combustion interfaces. In recent years, research of fire-retardant coatings for building materials has been subject to rapid development, and a variety of novel environmentally benign fire-retardant coatings have been reported. Nonetheless, as the surface characteristics of various flammable building materials are contrastively different, selecting chemical ingredients and controlling the physical morphology of fire-retardant coatings for specific building materials is rather complicated. Thus, it is urgent to review the ideas and preparation methods for new fire-retardant coatings. This paper summarizes the latest research progress of fire-retardant building materials, focusing on the compositions and performances of fire-retardant coatings, as well as the principles of their bottom-up design and preparation methods on the surface of building materials.

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Section: Chemical Composition and Physical Micromorphology Of Flame-r...mentioning

confidence: 99%

Comprehensive Review of Recent Research Advances on Flame-Retardant Coatings for Building Materials: Chemical Ingredients, Micromorphology, and Processing Techniques

2023

Molecules

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“…Currently, HNT has become an important natural material for the preparation of new aerogel material. Fu et al [31] prepared HNT/chitosan aerogel with anisotropic mechanical properties by a bidirectional freezing method, which showed good performance in thermal insulation with thermal equilibrium temperatures of 27.5 and 35.2 C at 50 and 100 C, respectively. Chen et al [32] prepared a poly(vinyl alcohol) (PVOH)/halloysite composite aerogel sample, unfortunately, the literature only mentions the thermal stability and combustion properties of the material, and does not discuss the structural morphology, mechanical properties, and thermal insulation properties.…”

Section: Introductionmentioning

confidence: 99%

Preparation of highly efficient thermal insulating halloysite nanotubes/polyvinyl alcohol composite aerogel based on a simple freeze‐drying strategy

Yang

Sun

et al. 2022

Polymer Composites

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The development of high‐performance energy‐saving insulation materials is significant for reducing building energy consumption and promoting carbon neutrality. Aerogels show great potential in energy‐saving insulation. However, their high preparation cost and poor mechanical properties limit their application. Here, based on a simple freeze‐drying strategy, a halloysite nanotubes (HNTs)/polyvinyl alcohol (PVA) composite aerogel is achieved via low‐cost and degradable industrial raw material. In particular, a simple process for changing the properties of HNTs/PVA composite aerogels by regulating the solid concentration. As a result, stable covalent cross‐linking and hydrogen bonding structure between HNTs and PVA, long‐range ordered pore structure with high porosity (97.6%), low density (0.12 g/cm3), and low thermal conductivity (44.333 mW/m K) endow the HNTs/PVA composite aerogel high compressive strength (3.33 MPa), lightweight, and highly efficient thermal insulation properties. This work offers an attractive material for building insulation and carbon neutral.

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Well-cushioned and highly-elastic aerogel for multifunctional intelligent transportation packaging

Liu,

Pan,

Mao

et al. 2024

Chemical Engineering Journal

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Halloysite-based aerogels by bidirectional freezing with mechanical properties, thermal insulation and flame retardancy

Cited by 7 publications

References 42 publications

Comprehensive Review of Recent Research Advances on Flame-Retardant Coatings for Building Materials: Chemical Ingredients, Micromorphology, and Processing Techniques

Comprehensive Review of Recent Research Advances on Flame-Retardant Coatings for Building Materials: Chemical Ingredients, Micromorphology, and Processing Techniques

Preparation of highly efficient thermal insulating halloysite nanotubes/polyvinyl alcohol composite aerogel based on a simple freeze‐drying strategy

Well-cushioned and highly-elastic aerogel for multifunctional intelligent transportation packaging

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