Highly compressible, heat-insulating and self-extinguishing cellulose nanofiber/aramid nanofiber nanocomposite foams

Li, Jiaoyang; Lu, Zhaoqing; Xie, Fan; Huang, Jizhen; Ning, Doudou; Zhang, Meiyun

doi:10.1016/j.carbpol.2021.117837

Cited by 65 publications

(52 citation statements)

References 52 publications

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“…The stress retention and height recovery rates of PA-20 after 100 compression−decompression cycles were more than 80% and 90%, respectively (Table S1), which were also comparable to those of the low-density ANF-based composite aerogel. 57,58 Similar with the compressive strengths, the thermal conductivities of the PANF aerogels also increased in the range from 0.0339 W/(m•K) (PA-20) to 0.0718 W/(m•K) (PA-185) and were comparable with that of the ANF or PPTA-based aerogels prepared through the freeze−drying or supercritical drying method (Figure 3b and Table S2). It is worth noting that the low-density PANF aerogel samples (PA-20 and PA-40) performed well in the view of both specific strength and thermal conductivity, when compared with other kinds of low-density aerogels prepared through the freeze− drying method, as shown in Figure 3c and Table S3.…”

Section: Resultssupporting

confidence: 58%

Macroscopic-Scale Preparation of Aramid Nanofiber Aerogel by Modified Freezing–Drying Method

et al. 2021

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Aerogel has been widely known as a low-density and highly porous material and is closely connected with the complex processing methods, such as freeze−drying or supercritical drying. In this work, using the polymerization-induced aramid nanofiber (PANF) as a building block, we put forward a modified freezing−drying method for the high-efficiency preparation of all-para-aromatic-amide aerogels. In the preparation process, PANF hydrogel is first frozen at −18 °C and then dried at 20−150 °C for the formation of PANF aerogel. The PANF framework formed during the freezing process is crucial for the formation of the PANF aerogel. Moreover, the space-occupying effect of ice crystals is also helpful for the formation of the macroscopic pore structure in the aerogel. Aerogels with large size or well-controlled shape could be successfully obtained by this method. Through the variation of PANF concentration in the hydrogel and drying temperature, aerogels with different densities (20−185 mg/cm 3 ) could be achieved, and the lowest density is reached at 150 °C, with the PANF concentration of 0.7%. The low-density PANF aerogels show high specific compressive strengths and low thermal conductivities, which are comparable to those resulting from the freeze−drying or supercritical drying method. Furthermore, the shrinkage phenomenon in the drying process could be skillfully utilized for the preparation of PANF aerogel-coated objects. The PANF aerogels could be applied as a thermal insulating material or shock absorption material in practical applications.

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Section: Resultssupporting

confidence: 58%

Macroscopic-Scale Preparation of Aramid Nanofiber Aerogel by Modified Freezing–Drying Method

et al. 2021

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“…The self-extinguishment of the nanocomposite foams was attributed to the brick-and-mortar structured cell walls in which clay was dispersedly aligned in the mixed CNF and PVA matrix. Flame-retardant and highly compressible nanocomposite foams have also been introduced by Li et al [116] using CNFs and aramid nanofibers (ANFs) through the freeze-drying approach. When the nanocomposite foam samples were heated at 90 °C for 180 s, the lower thermal conductivity was observed for the CNF/ANF CNFs and montmorillonite clay were mixed together, and a poly(vinyl alcohol) solution was added to the mixed suspension.…”

Section: Flame Retardancy and Thermal Insulationmentioning

confidence: 99%

“…Silica particles were mixed with TEMPO-oxidized CNFs (TOCNFs) to yield silica-TOCNF nanocomposite foams using freeze-drying. The addition of silica particles could significantly S. Tanpichai -Express Polymer Letters Vol.16, No.1 (2022) (b) Infrared images of the nanocomposite foams prepared from CNFs and aramid nanofibers (ANFs) placed on a heating source with a temperature of 90 °C for 180 s [116] and (c) compressive stress-strain curves of the CNF/ANF nanocomposite foams after various compressing-releasing cycles at a strain of 50%. Reprinted and modified from Li et al [116] with permission of Elsevier.…”

Section: Flame Retardancy and Thermal Insulationmentioning

confidence: 99%

“…Reprinted and modified from Medina et al [104] with permission of Elsevier. (b) Infrared images of the nanocomposite foams prepared from CNFs and aramid nanofibers (ANFs) placed on a heating source with a temperature of 90 °C for 180 s[116] and (c) compressive stress-strain curves of the CNF/ANF nanocomposite foams after various compressing-releasing cycles at a strain of 50%. Reprinted and modified from Li et al[116] with permission of Elsevier.…”

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confidence: 99%

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Recent development of plant-derived nanocellulose in polymer nanocomposite foams and multifunctional applications: A mini-review

Tanpichai¹

2022

Express Polym. Lett.

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“…More impressively, ANF also inherits excellent mechanical performance, water resistance and thermal stability [ 30 , 31 , 32 , 33 ]. So far, ANF has been extensively applied in the reinforcement for polymer composites, such as polyvinyl alcohol (PVA) [ 34 ], poly(ethyleneoxide) (PEO) [ 35 ], epoxy resin [ 36 ] and cellulose nanofiber composite [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen-Bonding-Aided Fabrication of Wood Derived Cellulose Scaffold/Aramid Nanofiber into High-Performance Bulk Material

Han

Wang

et al. 2021

Materials

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Preparing a lightweight yet high-strength bio-based structural material with sustainability and recyclability is highly desirable in advanced applications for architecture, new energy vehicles and spacecraft. In this study, we combined cellulose scaffold and aramid nanofiber (ANF) into a high-performance bulk material. Densification of cellulose microfibers containing ANF and hydrogen bonding between cellulose microfibers and ANF played a crucial role in enhanced physical and mechanical properties of the hybrid material. The prepared material showed excellent tensile strength (341.7 MPa vs. 57.0 MPa for natural wood), toughness (4.4 MJ/m3 vs. 0.4 MJ/m3 for natural wood) and Young’s modulus (24.7 GPa vs. 7.2 GPa for natural wood). Furthermore, due to low density, this material exhibited a superior specific strength of 285 MPa·cm3·g−1, which is remarkably higher than some traditional building materials, such as concrete, alloys. In addition, the cellulose scaffold was infiltrated with ANFs, which also improved the thermal stability of the hybrid material. The facile and top-down process is effective and scalable, and also allows one to fully utilize cellulose scaffolds to fabricate all kinds of advanced bio-based materials.

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Highly compressible, heat-insulating and self-extinguishing cellulose nanofiber/aramid nanofiber nanocomposite foams

Cited by 65 publications

References 52 publications

Macroscopic-Scale Preparation of Aramid Nanofiber Aerogel by Modified Freezing–Drying Method

Macroscopic-Scale Preparation of Aramid Nanofiber Aerogel by Modified Freezing–Drying Method

Recent development of plant-derived nanocellulose in polymer nanocomposite foams and multifunctional applications: A mini-review

Hydrogen-Bonding-Aided Fabrication of Wood Derived Cellulose Scaffold/Aramid Nanofiber into High-Performance Bulk Material

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