Transparent and High Gas Barrier Films of Cellulose Nanofibers Prepared by TEMPO-Mediated Oxidation

Fukuzumi, Hayaka; Saito, Tsuguyuki; Iwata, Tadahisa; Kumamoto, Yoshiaki; Isogai, Akira

doi:10.1021/bm801065u

Cited by 1,161 publications

(814 citation statements)

References 18 publications

Supporting

Mentioning

771

Contrasting

Unclassified

Order By: Relevance

“…Chemical surface modification efficiently tackles this problem (Habibi 2014). Among the many different routes for surface modification reported, esterification with acetic anhydride or long chain carboxylic acids (Rodionova et al 2010;Lee et al 2011;Bulota et al 2012);grafting of polymers (Lönnberg et al 2008;Littunen et al 2011;Missoum et al 2012);cationization (Hasani et al 2008;Syverud et al 2010); silylation (Goussé et al 2004;Andresen et al 2006;Lu et al 2008a, b), and TEMPO oxidation (Saito et al 2006;Fukuzumi et al 2009) are mentioned as important examples. Even though highly successful at the laboratory scale, the up-scaling of these wetchemical approaches to industrial dimensions, involving partly pricey reagents and repeated solvent transfers is most probably quite cost-intensive.…”

Section: Introductionmentioning

confidence: 99%

Dry, hydrophobic microfibrillated cellulose powder obtained in a simple procedure using alkyl ketene dimer

et al. 2016

View full text Add to dashboard Cite

In order to produce dry and hydrophobic microfibrillated cellulose (MFC) in a simple procedure, its modification with alkyl ketene dimer (AKD) was performed. For this purpose, MFC was solventexchanged to ethyl acetate and mixed with AKD dissolved in the same solvent. Curing at 130°C for 20 h under the catalysis of 1-methylimidazole yielded a dry powder. Scanning electron microscopy of the powder indicated loss in nanofibrillar structure due to aggregation, but discrete microfibrillar structures were still present. Water contact angle measurements of films produced from modified and unmodified MFC showed high hydrophobicity after AKD treatment, which persisted even after extraction with THF for 8 h. The hydrophobized MFC was characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance and X-ray analysis. In summary, strong indications for the presence of AKD on the surface of MFC before and after extraction with solvent were found, but only a very small amount of covalent b-ketoester linkages between the modification agent and cellulose was revealed.

show abstract

Section: Introductionmentioning

confidence: 99%

Dry, hydrophobic microfibrillated cellulose powder obtained in a simple procedure using alkyl ketene dimer

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Similar to thickness development (figure 4), the buckling wavelengths show a linear propagation as well (figure 5a), with an increasing rate for PVAm-SiO 2 -PVAm-NFC than for PVAm-NFC. It has been reported elsewhere [1][2][3][4][5] that the buckling wavelength increases with increasing the number of layers. The Young' modulus, however, should not be affected by thickness over a certain thickness range [9][10][11][12][13] which is also demonstrated here in figure 5b.…”

Section: Resultsmentioning

confidence: 80%

“…It has also been shown that both CNC and NFC can be incorporated into Layer-by-Layer (LbL) self assemblies to yield films with controlled thickness and hence controlled optical properties depending on the composition of the film [3,4]. Recent investigations have also shown that it is possible to prepare freestanding films on NFC [5,6] with controlled barrier properties and with very low oxygen permeabilities at low relative humidities (RH). Another very interesting property of the NFC material is the very good mechanical properties of films and nano-papers prepared from this material [7] and free-standing LbL´s from NFC and Poly EthyleneImine (PEI) [8].…”

Section: Introductionmentioning

confidence: 99%

Addition of silica nanoparticles to tailor the mechanical properties of nanofibrillated cellulose thin films

Eita

Arwin

Granberg³

et al. 2011

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Over the last decade, the use of nanocellulose in advanced technological applications has been promoted both due the excellent properties of this material in combination with its renewability.In this study, multilayered thin films composed of nanofibrillated cellulose (NFC), polyvinyl amine (PVAm) and silica nanoparticles were fabricated on polydimethylsiloxane (PDMS) using a layer-by-layer adsorption technique. The multilayer build-up was followed in situ by quartz crystal microbalance with dissipation, which indicated that the PVAm-SiO 2 -PVAm-NFC system adsorbs twice as much wet mass material compared to the PVAm-NFC system for the same number of bilayers. This is accompanied with a higher viscoelasticity for the PVAm-SiO 2 -PVAm-NFC system. Ellipsometry indicated a dry-state thickness of 2.2 and 3.4 nm per bilayer 2 for the PVAm-NFC system and the PVAm-SiO 2 -PVAm-NFC system, respectively. Atomic force microscopy height images indicate that in both systems, a porous network structure is achieved.

show abstract

“…Tensile strength and Young's modulus of TEMPO-oxidized cellulose films have been reported to be 200−300 MPa and 6−7 GPa. 67 The EDS spectra showed 1.2 At% Na atomic concentration for CNF film, reflecting the presence of sodium carboxylate on the CNF surfaces, and the Na content increased to 2.0, 2.5, and 2.4 At% for CNF/AgNS, CNF/4AgNP, and CNF/8AgNP, respectively, possibly due to the additional Na absorption from NaBH 4 ( Figure 5c, Table 1 The appearance of all fcc crystal facets in CNF/AgNS confirms its isotropic nature while the low intensity reflects the low quantity of AgNSs. The XRD spectra of all films exhibited clear cellulose I crystalline structure between 10 and 30°same as reported for CNFs alone.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synthesis of Cellulose Nanofibril Bound Silver Nanoprism for Surface Enhanced Raman Scattering

Jiang

Hsieh

2014

Biomacromolecules

View full text Add to dashboard Cite

Silver nanoprisms (AgNPs) were robustly synthesized using TEMPO-oxidized cellulose nanofibrils (CNFs) as a dual capping and shape-regulating agent for the first time. Reducing AgNO 3 with NaBH 4 in CNF suspensions produced smaller but more uniform Ag nanospheres (AgNSs) with increasing Ag + /CNF ratios. CNF bound AgNSs were facilely transformed to AgNPs by etching with H 2 O 2 , supporting the capping and shape-regulating capability of CNFs. AgNPs could also be synthesized directly in a one-shot reduction reaction with NaBH 4 in the presence of both CNFs and H 2 O 2 . The AgNPs transformed from CNF bound AgNSs are similar to those synthesized directly, but more stable against H 2 O 2 . Successful synthesis of AgNPs with 80−320 nm truncated edges was confirmed by light blue solution color, sharp out-of-plane quadruple resonance peak at 334 nm and prominent in-plane dipole resonance peaks at 762−900 nm. The [111] lattice plane of AgNP was clearly evident by its predominant XRD peak at 38°, confirming the unique shape-regulating ability of the nearly fully surface carboxylated CNFs. The CNF surface bound AgNPs were easily fabricated into freestanding CNF/AgNPs films that showed excellent surface enhanced Raman scattering of Rhodamine 6G with analytical enhancement factor of 5 × 10 3 in contrast to none from the CNF/AgNSs film.

show abstract

Transparent and High Gas Barrier Films of Cellulose Nanofibers Prepared by TEMPO-Mediated Oxidation

Cited by 1,161 publications

References 18 publications

Dry, hydrophobic microfibrillated cellulose powder obtained in a simple procedure using alkyl ketene dimer

Dry, hydrophobic microfibrillated cellulose powder obtained in a simple procedure using alkyl ketene dimer

Addition of silica nanoparticles to tailor the mechanical properties of nanofibrillated cellulose thin films

Synthesis of Cellulose Nanofibril Bound Silver Nanoprism for Surface Enhanced Raman Scattering

Contact Info

Product

Resources

About