Fabrication of hydrophobic silica–cellulose aerogels by using dimethyl sulfoxide (DMSO) as solvent

He, Fei; Sui, Chao; Gao, Yang; He, Xiaodong; Li, Mingwei

doi:10.1016/j.matlet.2014.08.127

Cited by 18 publications

(7 citation statements)

References 18 publications

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“…Also in CP175R, the medium intense band in 1735 cm −1 is assigned to the CO group vibration from the resin while the fine band in 1260 cm −1 is attributed to the attachment of SiC group vibration onto the silica backbone . The vibration band extended from 1050 to 1150 can be related to SiOC interaction meaning that the pure raw materials composite, CP175R, and the secondary raw materials composite CAP1 developed good incorporation of the inorganic particles into the organic matrix with higher content of resin in CP175R.…”

Section: Resultsmentioning

confidence: 99%

Hybrid Cellulose–Silica Materials from Renewable Secondary Raw Resources: An Eco‐friendly Method

et al. 2018

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Hybrid organic–inorganic materials based on cellulose matrix and silica particles are obtained from wastes of the local paper recycling mill and sugarcane mill as renewable secondary raw materials. The performance comparison of these hybrid materials made from secondary raw materials against the materials made from pure, raw sources is discussed. The Fourier transform infrared spectra show that cellulose features prevail even at 43 wt% silica nanoparticles in the hybrid materials. Such a high content of silica originated from sugarcane bagasse ash and hollow glass microspheres contributes to the high thermal stability of the final composites, as seen by thermogravimetric analysis with very low water absorption. This one‐step approach of biobased hybrid materials represents an excellent way to produce high‐performance materials with high content of inorganic nanoparticles for a wide variety of applications like energy efficient building material completely cement‐free.

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Section: Resultsmentioning

confidence: 99%

Hybrid Cellulose–Silica Materials from Renewable Secondary Raw Resources: An Eco‐friendly Method

et al. 2018

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“…As one of the most broadly studied cellulose‐based materials, cellulose−mesoporous silica nanocomposites 57 have been very attractive material combination for developing new hybrid porous materials with advanced functionalities, such as enhanced thermal stability and mechanical properties, 2,11,32,58–67 excellent thermal insulation, 2,11,32,58,60,63–67 good hydrophobicity, 2,58,60,61,66–68 and reasonable visible light transmittance 2,11,69 . However, on the best of our knowledge, no report has been available until now about the investigation of flame‐retardant performance of cellulose/modified mesoporous silica nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of dialdehyde cellulose/amino‐functionalizedMCM‐41 core‐shellmicrospheres as a new eco‐friendly flame‐retardant nanocomposite

Abboud

Bondock

El‐Zahhar

et al. 2020

J of Applied Polymer Sci

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Using proper flame‐retardant materials when constructing buildings or fabricating devices is the most important fire safety guidelines. The halogen and phosphorus‐based compounds are among the most effective flame retardants. However, most of these compounds are recognized to have a harmful effect on human body and the environment during combustion. In this context, we designed and synthesized a new eco‐friendly flame‐retardant nanocomposite by combining dialdehyde cellulose (DAC) and amino‐functionalized mesoporous silica MCM‐41 (N‐M41). Spherical N‐M41 nanoparticles have been successfully prepared in one‐pot reaction using tetraethyl orthosilicate and (3‐aminopropyl)triethoxysilane (APTES), and then coated with different amounts of DAC through Schiff base reaction between the carbonyl group of DAC and NH2 of APTES. The resulted DAC@N‐M41 nanocomposite was characterized by XRD, Fourier transform infrared, scanning electron microscopy, transmission electron microscopy, differential thermal analysis (DTA) and thermogravimetry analysis (TGA). TEM micrographs revealed that this nanocomposite was made up of core‐shell nanospheres structure with narrow size distribution (ca. 140 nm). DTA and TGA analysis revelated that the presence of silica within the nanocomposite can effectively increase the char yield, decrease the heat release, and improve the fire performance of the prepared nanocomposite. A mechanism of the reduction in flammability of this nanocomposite has been proposed.

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“…In contrast to the two-step gelation−impregnation process, a one-step homogeneous dispersion and simultaneous gelation of nanocellulose and silica precursor are more attractive. However, current practice mostly employs organic silica precursors, such as TEOS 37,38 and methyltrimethoxysilane, 39 which requires redispersing nanocellulose into a common DMSO 39 or alcohol solvent 37,38 and therefore is more expensive and environmentally unfavorable. 40 Toward a more streamlined integration and green process, a facile one-step sol−gel process involving all aqueous dispersible precursors was developed to fabricate cellulose nanofibrils (CNFs)−silica aerogel.…”

Section: ■ Introductionmentioning

confidence: 99%

Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO₂ Adsorption

Jiang

Hsieh

2018

ACS Appl. Nano Mater.

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Cellulose nanofibrils (CNF)−silica aerogels have been facilely synthesized via a one-step in situ aqueous sol−gel process of polymerizing and aging the silica precursor in the presence of CNFs to encompass the superior dry compressive strength and flexibility of CNF aerogels and the thermal stability of silica aerogels. Sodium silicate (Na 2 SiO 3) was hydrolyzed and polymerized in the presence of CNFs at varied ratios to synthesize hydrogels whose storage and loss modulus confirmed CNFs to function as the structural skeleton. At the optimal 8:2 CNFs/Na 2 SiO 3 composition, the hydrogels with homogeneously dispersed silica and CNF can be freeze-dried into hierarchically mesoporous aerogels with ultralow density of 7.7 mg/cm 3 , high specific surface of 342 m 2 /g, and pore volume of 0.86 cm 3 /g. This robust sol−gel approach employs naturally abundant silica and cellulose in aqueous system to generate improved CNF−silica aerogels that had much higher compressive strength and modulus of up to 28.5 and 177 kPa and structural flexibility than silica aerogel and enhanced thermal stability and specific surface over CNF aerogel. Further functionalization of CNF−silica aerogels via organosilane reaction introduced primary amine groups capable of capturing CO 2 with an adsorption capacity of 1.49 mmol/g.

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Fabrication of hydrophobic silica–cellulose aerogels by using dimethyl sulfoxide (DMSO) as solvent

Cited by 18 publications

References 18 publications

Hybrid Cellulose–Silica Materials from Renewable Secondary Raw Resources: An Eco‐friendly Method

Hybrid Cellulose–Silica Materials from Renewable Secondary Raw Resources: An Eco‐friendly Method

Synthesis and characterization of dialdehyde cellulose/amino‐functionalizedMCM‐41 core‐shellmicrospheres as a new eco‐friendly flame‐retardant nanocomposite

Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO₂ Adsorption

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Fabrication of hydrophobic silica–cellulose aerogels by using dimethyl sulfoxide (DMSO) as solvent

Cited by 18 publications

References 18 publications

Hybrid Cellulose–Silica Materials from Renewable Secondary Raw Resources: An Eco‐friendly Method

Hybrid Cellulose–Silica Materials from Renewable Secondary Raw Resources: An Eco‐friendly Method

Synthesis and characterization of dialdehyde cellulose/amino‐functionalizedMCM‐41 core‐shellmicrospheres as a new eco‐friendly flame‐retardant nanocomposite

Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO2 Adsorption

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Aqueous Synthesis of Compressible and Thermally Stable Cellulose Nanofibril–Silica Aerogel for CO₂ Adsorption