Cellulose–Silica Nanocomposite Aerogels by In Situ Formation of Silica in Cellulose Gel

Cai, Jie; Liu, Shilin; Jiao, Feng; Kimura, Satoshi; Wada, Masahisa; Kuga, Shigenori; Zhang, Lina

doi:10.1002/ange.201105730

Cited by 115 publications

(50 citation statements)

References 26 publications

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“…[14][15][16][17][18] Flexibility that was possessed for membranes with silica-derived sheet or cage nanostructures has not been realized in membranes solely based on silica nanofibers. 3,19 Good mechanical properties (flexibility, tensile strength, and durability) are crucial for the real application of SNM, not only for new generation of flexible electronic devices, including batteries, sensors, supercapacitors, and magnetic actuators, but also for further designing of silica-derived ultralight cellular membranes for bioengineering and environmental remediation. [20][21][22][23][24] Therefore, developing a novel and general method to tackle this important issue is highly desired.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] Particularly, introducing magnetic nanoparticles into silica nanofibrous membranes (SNM) is a key issue for fabrication of future materials requiring multifunctional characteristics. [5][6][7][8] Up to date, several methods have been invented to fabricate magnetic SNM, such as hydrothermal route, template-assisted process, chemical vapour deposition, and structure-selective synthesis.…”

Section: Introductionmentioning

confidence: 99%

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Nickel Ferrite Nanoparticles Anchored onto Silica Nanofibers for Designing Magnetic and Flexible Nanofibrous Membranes

Hong

Yan

et al. 2015

ACS Appl. Mater. Interfaces

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Many applications proposed for magnetic silica nanofibers require their assembly into a cellular membrane structure. The feature to keep structure stable upon large deformation is crucial for a macroscopic porous material which functions reliably. However, it remains a key issue to realize robust flexibility in two-dimensional (2D) magnetic silica nanofibrous networks. Here, we report that the combination of electrospun silica nanofibers with zein dip-coating can lead to the formation of flexible, magnetic, and hierarchical porous silica nanofibrous membranes (SNM). The 290 nm diameter silica nanofibers act as templates for the uniform anchoring of nickel ferrite nanoparticles (size of 50 nm). Benefiting from the homogeneous and stable nanofiber-nanoparticle composite structure, the resulting magnetic SNM can maintain their structure integrity under repeated bending as high as 180° and can facilely recover. The unique hierarchical structure also provides this new class of silica membrane with integrated properties of ultralow density, high porosity, large surface area, good magnetic responsiveness, robust dye adsorption capacity, and effective emulsion separation performance. Significantly, the synthesis of such fascinating membranes may provide new insight for further application of silica in a self-supporting, structurally adaptive, and 2D membrane form.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nickel Ferrite Nanoparticles Anchored onto Silica Nanofibers for Designing Magnetic and Flexible Nanofibrous Membranes

Hong

Yan

et al. 2015

ACS Appl. Mater. Interfaces

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“…The distinct properties of nanocelluloses open a wide field of applications in composites (Cai et al 2012;Li et al 2014), insulation (Hayase et al 2014;Kobayashi et al 2014), packaging (Aulin et al 2010;Lavoine et al 2014), tissue engineering (Domingues et al 2014;Markstedt et al 2015) and many other utilization ways (Habibi et al 2010;Lin et al 2012). Nevertheless, drying of nanocelluloses with retention of their unique properties, in particular the high surface areas, remains a difficult and important challenge.…”

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confidence: 99%

Surface properties and porosity of highly porous, nanostructured cellulose II particles

et al. 2016

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Recently, a new member of the nanocellulose family was introduced, a cellulose II gel consisting of nanostructured and spherical particles. In this study, we compared two different drying techniques to obtain highly porous powders from this gel with preserved meso-and macroporous nanostructure: first, freeze-drying after solvent exchange to tBuOH and second, supercritical drying of the respective EtOH alcogel. The approaches yielded aerogel powders with surface areas of 298 and 423 m 2 /g, respectively. Both powders are amphiphilic and possess energetically heterogeneous surfaces with dominating dispersive term of the surface energy in the range of 50-52 mJ/m 2 , as determined by a combination of physicochemical surface characterization techniques, such as iGC, BET and SEM. Despite the lower surface area, the cheaper and more widespread method, freeze-drying, yields a more polar and reactive cryogel.Keywords Nanocellulose Á Lyocell Á Inverse gas chromatography Á Thermoporosimetry Á Freezedrying Á Supercritical drying Abbreviations CNFCellulose nanofibrils FD Freeze-drying scCO 2 Supercritical CO 2 Electronic supplementary material The online version of this article

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“…), [ 32,41,42 ] and stabilized by inorganic oxide nanoparticles (SiO 2 ). [ 43 ] From analysis of the dynamic mechanical behavior of the cellulose and fl uorescent cellulose biobased plastics, all samples showed the typical behavior of a semi-crystalline polymer (see Figure S3 in the Supporting Information). The tensile storage modulus ( E' ) of the fl uorescent cellulose biobased plastics increased in the presence of Rh B and fl uorescein, demonstrating signifi cant stiffening effects and thermal stability up to 200 °C.…”

Section: Resultsmentioning

confidence: 99%

Construction of Fluorescent Cellulose Biobased Plastics and their Potential Application in Anti-Counterfeiting Banknotes

Wang

Cai

Chen

et al. 2016

Macromol. Mater. Eng.

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Development of natural polymer biobased materials that are light responsive is very useful for industrial production and our lives for a sustainable world. In this work, on the basis of the strong hydrogen bonding interaction between cellulose chains and conjugated dye molecules, fluorescent cellulose biobased plastics are fabricated successfully by hot‐pressing rhodamine B‐loaded and/or fluorescein‐loaded cellulose hydrogels, which are prepared in an aqueous 4.6 wt% LiOH/15 wt% urea solution pre‐cooled to –12 °C. The experimental results indicate that the fluorescent dye molecules are tightly fixed into the cellulose matrix through the capturing of cellulose to the hydroxyl and amino groups of rhodamine B and fluorescein. The fluorescent cellulose biobased plastics exhibit good thermal stability, excellent mechanical properties, and photoluminescence properties, with a significant fluorescent signal under UV fluorescent light. It is not hard to imagine that the RhB/cellulose biobased plastic (RhCBP) and fluorescein/cellulose biobased plastic (FCBP) thin belts or pieces could be easily embedded into paper during production because of the same cellulose component. Therefore, paper including a few of these fluorescent cellulose biobased plastics would be a good candidate for making anti‐counterfeiting banknotes.

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Cellulose–Silica Nanocomposite Aerogels by In Situ Formation of Silica in Cellulose Gel

Cited by 115 publications

References 26 publications

Nickel Ferrite Nanoparticles Anchored onto Silica Nanofibers for Designing Magnetic and Flexible Nanofibrous Membranes

Nickel Ferrite Nanoparticles Anchored onto Silica Nanofibers for Designing Magnetic and Flexible Nanofibrous Membranes

Surface properties and porosity of highly porous, nanostructured cellulose II particles

Construction of Fluorescent Cellulose Biobased Plastics and their Potential Application in Anti-Counterfeiting Banknotes

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