A self-healing, recyclable, and degradable fire-retardant gelatin-based biogel coating for green buildings

Zhang, Lei; Huang, Yubin; Sun, Ping; Yun, Hai; Jiang, Saihua

doi:10.1039/d1sm00435b

Cited by 25 publications

(18 citation statements)

References 30 publications

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“…The resulting wood surface was 100% natural, food safe and had a contact angle with water of 161 • , but was not considered superhydrophobic as its roll-off angle was extremely high. Zhang et al designed a biogel coating based on chitosan, gelatin and glycerol that had quite a low adhesion (1.4 MPa), but some very interesting features [52]. It could completely heal medium damages under heating, be reused after being scrapped from the wood and dissolved in water, and be colored with water-soluble dyes.…”

Section: Organic Coatingsmentioning

confidence: 99%

“…These treatments, mostly belonging to the organic coatings' trends, included bio-based monomers for film-forming coatings [41][42][43][44]47], modified vegetal oils [39,40,45,46,51,55,56], biological polymers (chitosans, lignin, etc.) [57,58,92], and more [52,53,76,90,[143][144][145]. Many advantages come along with these materials, from the cradle to the grave.…”

Section: Ecological Aspectsmentioning

confidence: 99%

“…The so-casted coating was highly hydrophobic, with a water contact angle of 161 • ; however, it would not be considered superhydrophobic as its roll-off angle was way higher than 10 • . Second, Zhang et al prepared a jellified coating based on chitosan, gelatin and glycerol [52]. This coating had strong self-healing capabilities, being able to heal completely medium scratches simply by heating, and could easily be colored with water-soluble dyes.…”

Section: Ecological Aspectsmentioning

confidence: 99%

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Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

Blanchet

Pepin

2021

Coatings

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Increasing the use of wood in buildings is regarded by many as a key solution to tackle climate change. For this reason, a lot of research is carried out to develop new and innovative wood surface improvements and make wood more appealing through features such as increased durability, fire-retardancy, superhydrophobicity, and self-healing. However, in order to have a positive impact on the society, these surface improvements must be applied in real buildings. In this review, the last five years of research in the domain of wood surface improvements and modifications is first presented by sorting the latest innovations into different trends. Afterward, these trends are correlated to specifications representing different normative, ecologic and economic factors which must be considered when expecting to introduce a wood treatment to the market. With this review, the authors hope to help researchers to take into consideration the different factors influencing whether new innovations can leave the research laboratory or not, and thereby facilitate the introduction of new wood surface treatments in the society.

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Section: Organic Coatingsmentioning

confidence: 99%

Section: Ecological Aspectsmentioning

confidence: 99%

Section: Ecological Aspectsmentioning

confidence: 99%

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Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

Blanchet

Pepin

2021

Coatings

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“…Coating of wood by flame retardants is most commonly used technique. [45][46][47][48][49] Zinc, phosphorous or metallic salts or chlorinated or brominated biphenyls and ethers diphenyl have been used. [50][51][52][53] The risk for leaching and toxic environmental effects is a significant limitation.…”

Section: Introductionmentioning

confidence: 99%

Charge Regulated Diffusion of Silica Nanoparticles into Wood for Flame Retardant Transparent Wood

Samanta

Höglund

Samanta

et al. 2022

Advanced Sustainable Systems

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The preparation of wood substrates modified by charged inorganic nanoparticles (NPs) diffusing into the internal cell wall structure is investigated for generating functional properties. The flammability problem of wood biocomposites is addressed. NPs applied from colloidal sols carry charge to stabilize them against aggregation. The influence of charge on particle diffusion and adsorption should play a role for their spatial distribution and localization in the wood substrate biocomposite. It is hypothesized that improved dispersion, infiltration, and stability of NPs into the wood structure can be achieved by charge control diffusion, also restricting NP agglomeration and limiting distribution to the wood cell wall. Cationic and anionic silica NPs of ≈30 nm are therefore allowed to diffuse into bleached wood. The influence of charge on distribution in wood is investigated as a function of initial sol concentration. Transparent wood is fabricated by in situ polymerization of a thiol‐ene in the wood pore space. These biocomposites demonstrate excellent flame retardancy with self‐extinguishing characteristics. The approach has potential for commercial fabrication of flame retardant transparent composites for glazing and other building applications.

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“…Public concern about fire triggers research activity that has already created effective fire-protective additives for polymers, [ 15 , 16 , 17 , 18 , 19 , 20 ] like hydrated compounds, for example, hydrated salts [ 21 ], oxides (e.g., alumina) and clays that undergo endothermic degradation, carbonates like huntite that decompose forming a CO 2 gas blanket, halogenated paraffins and polymers that emit free-radical suppressants, and chemicals that intumesce like the expandable ammonium phosphates [ 22 ], or still those that form a barrier between air and the substrate, e.g., silica [ 23 , 24 , 25 , 26 ] and clays [ 27 , 28 ], or char as, for example, organophosphorus compounds [ 16 , 29 , 30 , 31 ], polyols and melamine. Graphite (flakes, powder or expanded) has been used as an additive in intumescing coatings [ 19 , 20 , 32 , 33 , 34 , 35 ] and in polymer composites [ 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 ]. Thus, existing fire-retardants explore different approaches and mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly, High-Performance Fire Retardant Made from Cellulose and Graphite

et al. 2021

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Many materials and additives perform well as fire retardants and suppressants, but there is an ever-growing list of unfulfilled demands requiring new developments. This work explores the outstanding dispersant and adhesive performances of cellulose to create a new effective fire-retardant: exfoliated and reassembled graphite (ERG). This is a new 2D polyfunctional material formed by drying aqueous dispersions of graphite and cellulose on wood, canvas, and other lignocellulosic materials, thus producing adherent layers that reduce the damage caused by a flame to the substrates. Visual observation, thermal images and surface temperature measurements reveal fast heat transfer away from the flamed spots, suppressing flare formation. Pinewood coated with ERG underwent standard flame resistance tests in an accredited laboratory, reaching the highest possible class for combustible substrates. The fire-retardant performance of ERG derives from its thermal stability in air and from its ability to transfer heat to the environment, by conduction and radiation. This new material may thus lead a new class of flame-retardant coatings based on a hitherto unexplored mechanism for fire retardation and showing several technical advantages: the precursor dispersions are water-based, the raw materials used are commodities, and the production process can be performed on commonly used equipment with minimal waste.

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A self-healing, recyclable, and degradable fire-retardant gelatin-based biogel coating for green buildings

Abstract: Wood is one of the oldest building materials and commonly employed in construction. However, the inherent fire hazard of wood restricts its practical application. Fire retardant coatings have been proved...

Cited by 25 publications

References 30 publications

Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

Trends in Chemical Wood Surface Improvements and Modifications: A Review of the Last Five Years

Charge Regulated Diffusion of Silica Nanoparticles into Wood for Flame Retardant Transparent Wood

Environmentally Friendly, High-Performance Fire Retardant Made from Cellulose and Graphite

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