Excellent flame retardant and thermal insulated palygorskite/wood fiber composite aerogels with improved mechanical properties

Zhou, Xinyu; Jin, Huiran; Wang, Jinbo; Zhu, Yong; Ding, Shangwu; Hu, Tao; Yun, Shan; Chen, Jing

doi:10.1016/j.clay.2019.105402

Cited by 30 publications

(9 citation statements)

References 35 publications

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“…(c) Maximum compressive modulus and compressive strength for the GA aerogel and HNTs/GA composite aerogels. (d) Comparison of the specific modulus of the HNTs/GA aerogels with those of PFR/Si-70, EM/SF-40, P/M/PP-APP 8 , Pal/WF-7%, KGM/SiO 2 , CNF/emulsion, and HAP/PI-0.4 . (e) Compressive stress–strain curve of the HNTs/GA composite aerogel in the radial direction.…”

Section: Resultsmentioning

confidence: 99%

“…However, pure biomass aerogels possess low mechanical strength, uneven structure, and high brittleness, which limits their large-scale application. 1 In order to improve the mechanical properties of biomass aerogels, many methods have been studied to overcome the shortcomings of biomass aerogels, such as adding reinforced materials, chemical cross-linking, and/or adjusting the method of cold casting. 19−21 A low-cost mineral clay is used to enhance the physical structure of biopolymer aerogels, including mechanical strength and thermal insulation.…”

Section: Introductionmentioning

confidence: 99%

“…An aerogel is a kind of solid material which uses air instead of a liquid solvent in a gel and does not change the network structure or volume of the gel. , Because of its low density, high porosity, high specific surface area, and low thermal conductivity, the aerogel is considered to be the best solid material for thermal insulation and heat preservation at present . Among aerogels, biomass aerogels derived from plants and animals with low cost, nontoxic, and biodegradability have attracted great attention in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…It is an ideal material for constructing macroscopic three-dimensional (3D) materials. However, pure biomass aerogels possess low mechanical strength, uneven structure, and high brittleness, which limits their large-scale application …”

Section: Introductionmentioning

confidence: 99%

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Cogel Strategy for the Preparation of a “Thorn”-Like Porous Halloysite/Gelatin Composite Aerogel with Excellent Mechanical Properties and Thermal Insulation

Fu-xing

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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This work presents the preparation and property characterization of a biomass gelatin (GA)-based aerogel. Halloysite nanotubes (HNTs) were used to improve the mechanical strength, pore size distribution, and thermal stability of the aerogel. Polyethyleneimine (PEI) and (3-glycidyloxypropyl)trimethoxysilane (GPTMS) were utilized to increase the interfacial interaction between HNTs and GA through chemical cross-linking. Green, sustainable, and low-cost composite aerogels were prepared by “cogel” and freeze-drying techniques. The experimental results show that the HNTs/GA composite aerogel has a low density (31.98–57.48 mg/cm3), a high porosity (>95%), a low thermal conductivity (31.85–40.16 mW m–1 K–1), and superior moldability. In addition, the mechanical strength and thermal insulation properties of the HNTs/GA composite aerogels with a “thorn”-like lamellar porous network structure are different in the axial direction versus the radial direction. The maximum compressive strength, maximum compressive modulus, and corresponding specific modulus in the axial direction were 1.81 MPa, 5.45 MPa, and 94.8 kN m kg–1, respectively. Therefore, the biomass/clay composite aerogel will be a sustainable and renewable functional material with high mechanical strength and thermal insulation properties, which is expected to further promote biomass and clay for high value utilization.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cogel Strategy for the Preparation of a “Thorn”-Like Porous Halloysite/Gelatin Composite Aerogel with Excellent Mechanical Properties and Thermal Insulation

Fu-xing

Liu

et al. 2022

ACS Appl. Mater. Interfaces

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“…Wood fibers with palygorskite make aerogels with pHRR under 30 kW/m². [315] Cellulose NanoFibers (CelNF) are also largely used and combined with sodium carbonate, [316] graphene oxide mixed with ZrP [317] or sepiolite, [318] or in a mixture of carboxymethylcellulose, APP and MMT. [319] Sometimes an additional crosslinking step is performed, for example by heat treatment with the addition of N-methylol dimethylphosphonopropionamide (MDPA) and 1,2,3,4-butanetetracarboxylic acid (BTCA).…”

Section: Aerogelsmentioning

confidence: 99%