Nano-fibrillated cellulose-hydroxyapatite based composite foams with excellent fire resistance

Guo, Wenwen; Wang, Xin; Zhang, Ping; Li, Jiajia; Song, Lei; Hu, Yuan

doi:10.1016/j.carbpol.2018.04.063

Cited by 106 publications

(64 citation statements)

References 35 publications

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“…These polymers are called carboxycellulose and have been widely used for biomedical applications such as surgical sutures [20][21][22]. Recent developments of carboxycellulose in the nanoscale have further expanded their uses in making strengthened nanocomposite materials [23][24][25]. Since carboxycellulose nanofibers is derived from cellulose microfibril building blocks, it is readily able to be extracted from a variety of biomass materials [26,27].…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of Natural Rubber Latex Using Jute Carboxycellulose Nanofibers Extracted Using Nitro-Oxidation Method

Sharma

Lin

et al. 2020

Nanomaterials

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Synthetic rubber produced from nonrenewable fossil fuel requires high energy costs and is dependent on the presumed unstable petroleum price. Natural rubber latex (NRL) is one of the major alternative sustainable rubber sources since it is derived from the plant ‘Hevea brasiliensis’. Our study focuses on integrating sustainably processed carboxycellulose nanofibers from untreated jute biomass into NRL to enhance the mechanical strength of the material for various applications. The carboxycellulose nanofibers (NOCNF) having carboxyl content of 0.94 mmol/g was prepared and integrated into its nonionic form (–COONa) for its higher dispersion in water to increase the interfacial interaction between NRL and NOCNF. Transmission electron microscopy (TEM) and atomic force microscopy (AFM) analyses of NOCNF showed the average dimensions of nanofibers were length (L) = 524 ± 203 nm, diameter (D) 7 ± 2 nm and thickness 2.9 nm. Furthermore, fourier transform infra-red spectrometry (FTIR) analysis of NOCNF depicted the presence of carboxyl group. However, the dynamic light scattering (DLS) measurement of NRL demonstrated an effective diameter in the range of 643 nm with polydispersity of 0.005. Tensile mechanical strengths were tested to observe the enhancement effects at various concentrations of NOCNF in the NRL. Mechanical properties of NRL/NOCNF films were determined by tensile testing, where the results showed an increasing trend of enhancement. With the increasing NOCNF concentration, the film modulus was found to increase quite substantially, but the elongation-to-break ratio decreased drastically. The presence of NOCNF changed the NRL film from elastic to brittle. However, at the NOCNF overlap concentration (0.2 wt. %), the film modulus seemed to be the highest.

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Section: Introductionmentioning

confidence: 99%

Reinforcement of Natural Rubber Latex Using Jute Carboxycellulose Nanofibers Extracted Using Nitro-Oxidation Method

Sharma

Lin

et al. 2020

Nanomaterials

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“…Network‐structured ultralong HAPNWs and CFs are selected as raw materials for the CF/HAPNW secret paper because their thermal stabilities are totally different, which are evaluated by thermogravimetric (TG) analysis (Figure ). The TG curve of the paper made of CFs shows a typical two‐step thermal degradation process . The weight loss below 200 °C is ascribed to the evaporation of adsorbed water.…”

Section: Resultsmentioning

confidence: 99%

“…TheT Gc urve of the paper made of CFs shows at ypical two-step thermal degradation process. [24,25] The weightl oss below 200 8Ci sa scribed to the evaporation of adsorbed water.F rom 200 to about 350 8C (the first step), CFs undergo dehydration and decomposition. In the second step (350-530 8C), the residue left from the first step is carbonized and oxidized,p roducing CO andC O 2 .T he total weight loss of the CF paper is as higha s9 4.79 %a t 800 8C, whereas the paper made of ultralong HAPNWsi sv ery stable at high temperatures and its total weight loss at 800 8C is just 5.22 %.…”

Section: Resultsmentioning

confidence: 99%

Secret Paper with Vinegar as an Invisible Security Ink and Fire as a Decryption Key for Information Protection

Chen

Zhu

Zhang

et al. 2019

Chemistry A European J

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Security inks based on photoluminescent materials are mostly investigated for security applications, such as information encryption and decryption, anti‐counterfeiting, and data storage. Although they are invisible to the naked eye under ambient light, they can be detected under ultraviolet or near‐infrared light. Herein, a new kind of secret paper made from network‐structured ultralong hydroxyapatite nanowires and cellulose fibers has been developed. White vinegar, a common cooking ingredient, is used as an invisible security ink. Covert information on the secret paper written with white vinegar is totally invisible under natural light, but it can be decrypted and clearly read after exposure to fire; the response time to fire is short (<10 s). The ways of writing on the secret paper are diverse by using various pens loaded with white vinegar.

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“…Hydroxyapatite is an inorganic component found in bones making it an abundant and non-toxic choice as a flame-retardant additive. This motivated Guo et al [42] to fabricate a series of cellulose/hydroxyapatite aerogels through a freeze-drying approach. Although the thermal conductivity was relatively high (0.038 W•m −1 •K −1 ), the addition of the inorganic phase provided the material a low peak heat release rate (20.4 kW•m −2 ) and total heat release (1.21 MJ•m −2 ) according to cone calorimetry tests.…”

Section: Flame-retardant Performance and Thermal Stabilitymentioning

confidence: 99%

Cellulose Aerogels for Thermal Insulation in Buildings: Trends and Challenges

et al. 2018

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Cellulose-based aerogels hold the potential to become a cost-effective bio-based solution for thermal insulation in buildings. Low thermal conductivities (<0.025 W·m−1·K−1) are achieved through a decrease in gaseous phase contribution, exploiting the Knudsen effect. However, several challenges need to be overcome: production energy demand and cost, moisture sensitivity, flammability, and thermal stability. Herein, a description and discussion of current trends and challenges in cellulose aerogel research for thermal insulation are presented, gathered from studies reported within the last five years. The text is divided into three main sections: (i) an overview of thermal performance of cellulose aerogels, (ii) an identification of challenges and possible solutions for cellulose aerogel thermal insulation, and (iii) a brief description of cellulose/silica aerogels.

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Nano-fibrillated cellulose-hydroxyapatite based composite foams with excellent fire resistance

Cited by 106 publications

References 35 publications

Reinforcement of Natural Rubber Latex Using Jute Carboxycellulose Nanofibers Extracted Using Nitro-Oxidation Method

Reinforcement of Natural Rubber Latex Using Jute Carboxycellulose Nanofibers Extracted Using Nitro-Oxidation Method

Secret Paper with Vinegar as an Invisible Security Ink and Fire as a Decryption Key for Information Protection

Cellulose Aerogels for Thermal Insulation in Buildings: Trends and Challenges

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