Nanocellulose-montmorillonite composites of low water vapour permeability

Garusinghe, Uthpala; Varanasi, Swambabu; Raghuwanshi, Vikram Singh; Garnier, Gil; Batchelor, Warren

doi:10.1016/j.colsurfa.2018.01.010

Cited by 56 publications

(29 citation statements)

References 48 publications

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“…The results showed that when the mass fraction of montmorillonite was 6%, the composite had good dispersion, and the thermal stability and mechanical properties of the composite were improved. Garusinghe et al [35] developed a novel composite material that disperses montmorillonite into nanocellulose and achieves low water vapor permeability. However, the compatibility of montmorillonite was so poor that the prepared composites cannot meet the practical application requirements.…”

Section: Introductionmentioning

confidence: 99%

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Sun

Yang

et al. 2019

Polymers

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Polylactic acid (PLA) is one of the most promising bio-based materials, but its inherent hydrophobicity limits its application. Although nanocellulose (NCC) is a desirable reinforcement for PLA, the poor interface compatibility between the two has been a challenge. In this work, hydroxyapatite (HAP) modified NCC was prepared, and the obtained NCC/HAP reinforcement was used to prepare PLA/NCC-HAP composites. Different ratios of NCC to HAP were studied to explore their effects on the mechanical and thermodynamic properties of the composites. When the ratio of NCC to HAP was 30/70, the tensile strength and tensile modulus of the composite film reached 45.6 MPa and 2.34 GPa, respectively. Thermogravimetric analysis results indicate that thermal stability of the composites was significantly improved compared with pure PLA, reaching 346.6 °C. The above revelations show that NCC/HAP significantly improved the interface compatibility with PLA matrix.

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Section: Introductionmentioning

confidence: 99%

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Sun

Yang

et al. 2019

Polymers

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“…The composites were increasingly yellowish in colour in the Closite Na++ MMT composite, reddish in the Closite Ca++ MMT composite, light grey in the Closite 116 MMT composite due to the increased MMT content from 5% to 75 wt.%. This is due to the absorption spectra of MMT in the nanocomposites, which is similarly observed by [14] and [15]. The smooth and coloured composite as a finishing quality is achieved by spray coating and adjusting the MMT loading in CNF suspension.…”

Section: Resultsmentioning

confidence: 59%

“…The spraying cellulose nanofiber -MMT suspension on stainless steel plates produces a compact structure of nanocomposite giving an impermeable composite film as barrier against air. The elevation of WVP of the composite was due to increase of MMT loading.The WVP of spray coated composites was shown to yield a higher WVP when produced by this method, especially when compared to similar films by method of vacuum filtration [14]. The reason for this elevation in WVP for spray coated composites was the aggregation and stacking of MMT within the cellulose nanofibers, which is more dominant at a higher loading for nanocomposites.…”

Section: Barrier Performance Of Spray Coated Nanocompositementioning

confidence: 86%

“…The pattern on increase WVP with MMT content was same for three types of composites.The WVP of spray coated nanocomposites via spray coating increased as the MMT concentration increased, reaching 3.3±0.07 × 10 -11 g/Pa.s.m at 30 % MMT (Closite Na ++ ) loading and 5.0 × 10 -11 g/Pa.s.m at 75 % MMT (Closite Na ++ ) loading from a value of 2.5±0.12 × 10 -11 g/Pa.s.m for spray coated pure CNF/ NC film. For sprayed composites, the WVP of the composite initially decreased for 5 wt.% loading compared to pure CNF films and beyond.The elevation of WVP of the composite was due to increase of MMT loading.The WVP of spray coated composites was shown to yield a higher WVP when produced by this method, especially when compared to similar films by method of vacuum filtration[14]. The reason for this elevation in WVP for spray coated composites was the…”

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confidence: 87%

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Preparation of Cellulose Nanofiber (CNF) – Montmorillonite (MMT) Nanocomposite via Spray Coating Process

Shanmugam¹

2021

JMSSE

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The spray coating process is implemented through the production of smooth Montmorillonite (MMT) -Cellulose nanofiber (CNF) composite functioning as a barrier material and base substrate for printed electronics. In this process, the effect of MMT loading into the cellulose nanofiber (CNF) suspension for producing nanocomposite is independent of the operation time. Throughout this investigation, the barrier, surface, and topography of the spray coated nanocomposites were investigated. The MMT content varied from 5 wt.% to 75 wt.% in the composites via spraying of 2 wt.% of CNF suspension. Three types of nanocomposites were prepared from cellulose nanofiber with the MMT category of closite Na++, closite Ca++ and closite 116. By varying the MMT content in the nanocomposite, the spray coating was more productive with the basis weight of nanocomposites ranging from ῀70 g/m 2 to ῀100g/m 2 with sheet thickness varying from ῀81.7µm to 135.8µm and independent of the operation time which was less than 1 min. The air permeance and water vapour permeability of the spray coated nanocomposites were investigated to confirm the green materials was infact barrier material. Aggregation of MMT clays on a further increase of MMT in nanocomposite resulted in the elevation of WVP. The composite has two unique surfaces, namely rough and smooth surfaces from metal side. Scanning electron microscopy (SEM) reveals the distribution of MMT on the surface, compactness and smoothness of the composite. The composites are flexible, demonstrate good uniformity and pigmentation as a result of an increase in MMT loading.Considering the barrier performance and surface roughness of nanocomposites, it can be used as packaging materials and as a base substrate for printed electronics. In comparsion, spray coating is a more efficient process for producing sustainable nanocomposites as alternative for synthetic plastics.

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“…20 CNM-based composite and hybrid coatings, films and aerogels containing various inorganic components can have favourable mechanical properties. [21][22][23][24][25] Furthermore, materials consisting of CNM with nanoclays, especially montmorillonite (MNT), have displayed combinations of high strength with heat tolerance, 26 fire retardancy, 27 dye adsorption, 28 and low oxygen 29 and watervapour 30 permeability. While self-assembly has been studied in single-component CNC and MNT dispersions, 11,[31][32][33] including, in the case of CNC, in confined geometries such as sessile, 34 emulsion 35 and levitating 36 droplets, studies of multicomponent CNC:MNT systems are sparse.…”

Section: Introductionmentioning

confidence: 99%

Assembly of cellulose nanocrystals and clay nanoplatelets studied by time-resolved X-ray scattering

Munier

Hadi

et al. 2021

Soft Matter

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Nanocellulose-montmorillonite composites of low water vapour permeability

Cited by 56 publications

References 48 publications

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Properties of Polylactic Acid Reinforced by Hydroxyapatite Modified Nanocellulose

Preparation of Cellulose Nanofiber (CNF) – Montmorillonite (MMT) Nanocomposite via Spray Coating Process

Assembly of cellulose nanocrystals and clay nanoplatelets studied by time-resolved X-ray scattering

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