Extreme Thermal Shielding Effects in Nanopaper Based on Multilayers of Aligned Clay Nanoplatelets in Cellulose Nanofiber Matrix

Carosio, Federico; Kochumalayil, Jose Joby; Fina, Alberto; Berglund, Lars A.

doi:10.1002/admi.201600551

Cited by 32 publications

(33 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, during flame penetration tests, the presence of MTM further limits the solid state char oxidation by limiting oxygen diffusion within the foam structure. [ 63 ] The collected results demonstrate excellent flame shielding properties of CNF/XG/MTM foams. Potential applications include building materials, lightweight foam cores and fire‐safe materials in ground or aerospace transportation.…”

Section: Resultsmentioning

confidence: 96%

Green and Fire Resistant Nanocellulose/Hemicellulose/Clay Foams

Carosio

Medina

Kochumalayil

et al. 2021

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

Lightweight polymer foams from synthetic polymers are commonly used in a wide‐spread spectrum of application fields. Their intrinsic flammability coupled with restrictions on flame retardant chemicals poses a severe threat to safety. Here, fire resistant foams comprising biobased components capable of replacing petroleum‐based foams are investigated. Cellulose nanofibers are combined with 2D montmorillonite nanoplatelets and a native xyloglucan hemicellulose binder, using a water‐based freeze casting approach. Due to the silicate nanoplatelets, these lightweight foams self‐extinguish the flame during flammability tests. The limiting oxygen index is as high as 31.5% and in the same range as the best fire‐retardant synthetic foams available. In cone calorimetry, the foams display extremely low combustion rates. Smoke release is near the detection limit of the instrument. In addition, the foams are withstanding the penetration of a flame torch focused on one side of the specimen (T on surface 800 °C) and structural integrity is maintained. At the same time, the unexposed side is insulated, as demonstrated by a through‐thickness temperature drop of 680 °C cm−1. The results represent a tremendous opportunity for the development of fire‐safe foams combining excellent sustainability with multifunctional performance.

show abstract

Section: Resultsmentioning

confidence: 96%

Green and Fire Resistant Nanocellulose/Hemicellulose/Clay Foams

Carosio

Medina

Kochumalayil

et al. 2021

Adv Materials Inter

Self Cite

View full text Add to dashboard Cite

show abstract

“…Several strategies have been developed to construct brick‐and‐mortar‐like nanocellulosic materials such as self‐assembly of components in water media followed by dehydration, layer‐by‐layer sequential assembly, or ice‐templating/freeze‐casting/bidirectional freezing ( Figure ). [ 190,192–208 ] Therein, nanocelluloses were mainly self‐assembled as the mortar between the inorganic nanoplatelets, such as clay, MXene, talc, graphite, graphene, or graphene oxide, in a binary blend system (Figure 12a,b). In an aqueous suspension, nanocelluloses were able to exfoliate platelets, e.g., graphite and graphene (Figure 12a).…”

Section: Nonmodification Interface Engineeringmentioning

confidence: 99%

“…Reproduced with permission. [ 194 ] Copyright 2016, Wiley‐VCH. c) Schematic showing the fracture process of the brick‐and‐mortar‐structured nanocellulose composite (here, as a case example, graphite–CNF composite) under tension.…”

Section: Nonmodification Interface Engineeringmentioning

confidence: 99%

“…For binary nanocomposites (excluding those contained nanocarbon materials in the composition), the σ of up to ≈200 MPa and E of up to ≈20 GPa were reported. These materials are suitable for semi‐structural applications, [ 23 ] and show excellent fire/thermal shielding (CNF/clay) (Figure 12b), [ 193,194,200 ] electromagnetic interference shielding (CNF/MXene), [ 192 ] iridescence (CNC/poly(vinyl alcohol)), [ 190 ] or barrier properties. [ 197,200 ] For a ternary CNF/clay/poly(vinyl alcohol) composite, for example, the σ and E reached to ≈300 MPa and ≈23 GPa, respectively, with a toughness of ≈4 MJ m −3 at 70 wt% CNF/clay (2:1) reinforcement (Figure 12d).…”

Section: Nonmodification Interface Engineeringmentioning

confidence: 99%

See 1 more Smart Citation

Surface and Interface Engineering for Nanocellulosic Advanced Materials

et al. 2020

View full text Add to dashboard Cite

How do trees support their upright massive bodies? The support comes from the incredibly strong and stiff, and highly crystalline nanoscale fibrils of extended cellulose chains, called cellulose nanofibers. Cellulose nanofibers and their crystalline parts—cellulose nanocrystals, collectively nanocelluloses, are therefore the recent hot materials to incorporate in man‐made sustainable, environmentally sound, and mechanically strong materials. Nanocelluloses are generally obtained through a top‐down process, during or after which the original surface chemistry and interface interactions can be dramatically changed. Therefore, surface and interface engineering are extremely important when nanocellulosic materials with a bottom‐up process are fabricated. Herein, the main focus is on promising chemical modification and nonmodification approaches, aiming to prospect this hot topic from novel aspects, including nanocellulose‐, chemistry‐, and process‐oriented surface and interface engineering for advanced nanocellulosic materials. The reinforcement of nanocelluloses in some functional materials, such as structural materials, films, filaments, aerogels, and foams, is discussed, relating to tailored surface and/or interface engineering. Although some of the nanocellulosic products have already reached the industrial arena, it is hoped that more and more nanocellulose‐based products will become available in everyday life in the next few years.

show abstract

“…When the films were exposed to a temperature of 900 °C, they showed a temperature drop of 300 °C on the unexposed side. [ 125 ]…”

Section: Discrete Cnm Macrophase Compositesmentioning

confidence: 99%

Recent Developments in Cellulose Nanomaterial Composites

et al. 2020

View full text Add to dashboard Cite

Cellulose nanomaterials (CNMs) are a class of materials that have recently garnered attention in fields as varied as structural materials, biomaterials, rheology modifiers, construction, paper enhancement, and others. As the principal structural reinforcement of biomass giving wood its mechanical properties, CNM is strong and stiff, but also nontoxic, biodegradable, and sustainable with a very large (Gton yr−1) source. Unfortunately, due to the relatively young nature of the field and inherent incompatibility of CNM with most man‐made materials in use today, research has tended to be more basic‐science oriented rather than commercially applicable, so there are few CNM‐enabled products on the market today. Herein, efforts are presented for preparing and forming cellulose nanomaterial nanocomposites. The focus is on recent efforts attempting to mitigate common impediments to practical commercialization but is also placed in context with traditional efforts. The work is presented in terms of the progress made, and still to be made, on solving the most pressing challenges—getting properties that are competitive with currently used materials, removing organic solvent, solving the inherent incompatibility between CNM and polymers of interest, and incorporation into commonly used industrial processing techniques.

show abstract

Extreme Thermal Shielding Effects in Nanopaper Based on Multilayers of Aligned Clay Nanoplatelets in Cellulose Nanofiber Matrix

Cited by 32 publications

References 26 publications

Green and Fire Resistant Nanocellulose/Hemicellulose/Clay Foams

Green and Fire Resistant Nanocellulose/Hemicellulose/Clay Foams

Surface and Interface Engineering for Nanocellulosic Advanced Materials

Recent Developments in Cellulose Nanomaterial Composites

Contact Info

Product

Resources

About