Preparation and characterisation of nanocellulose reinforced polyamide-6

Qua, E. H.; Hornsby, Peter

doi:10.1179/1743289810y.0000000019

Cited by 45 publications

(35 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These findings are in excellent accordance with the reported literature (Qua et al 2011). The yielded nanocellulose produced in this study showed a finer fibrillar structure and reduced fiber diameter compared with native cellulose (23.1 ± 11.5 μm).…”

Section: Surface Characterization Analysis (Fe-sem)supporting

confidence: 82%

“…In this study, the size distribution of all two types of nanocellulose (20 to 80 nm) was thus rather similar and relatively close to that reported for waste sackcloth (20 to 50 nm; Cao et al 2015), borer powder (20 to 70 nm; Hu et al 2014), rubberwood (10 to 90 nm; Jonoobi et al 2011), sugarcane bagasse (20 to 60 nm; Kumar et al 2014), flax (2 to 50 nm; Qua et al 2011), and old corrugated container (15 to 80 nm; . …”

Section: Morphological Analysis (Tem)supporting

confidence: 51%

“…This was accredited to the strong intermolecular hydrogen bonding within the cellulose chains. As a result, the cellulosic fibrils tended to be agglomerated during the lyophilizing process (Qua et al 2011).…”

Section: Surface Characterization Analysis (Fe-sem)mentioning

confidence: 99%

See 2 more Smart Citations

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Chen¹,

Lee²,

Hamid³

2016

BioResources

View full text Add to dashboard Cite

Nanostructured cellulose was successfully prepared from native cellulose using a homogeneous catalytic H2SO4 hydrolysis pathway in the presence of Cr(III)-and Mn(II)-transition metal salts as the co-catalyst. The effect of transition metal salts with different valence states (Cr 3+ and Mn 2+) on the physicochemical properties (chemical characteristics, crystallinity index, nano-structure, thermal stability, and morphology) of prepared nanocellulose was investigated. Interestingly, TEM micrographs showed that the Cr(III)-treated and Mn(II)-treated nanocellulose exhibited a weblike nanostructured-surface with average diameters of 44.7 ± 13.2 nm and 58.4 ± 15.3 nm, respectively. XRD study revealed that the crystallinity of nanocellulose was increased because the catalytic degradation of the less crystalline regions of cellulose occurred at a faster rate than its crystalline phases. Cr(III)-treated nanocellulose was capable of rendering a higher crystallinity index (75.6 ± 0.1%) compared with Mn(II)-treated nanocellulose (72.3 ± 0.4%). Furthermore, a dynamic light scattering (DLS) study revealed that Cr(III)-treated nanocellulose showed a smaller distribution range (92% at 14 to 135 nm) compared with Mn(II)-treated nanocellulose (92% at 607 nm). A higher valence state for the Cr(III)-cation, with a trivalent state (+3), rendered a more effective hydrolysis reaction compared with the Mn(II)-cation, with a divalent state (+2), for preparing the nanocellulose.

show abstract

Section: Surface Characterization Analysis (Fe-sem)supporting

confidence: 82%

Section: Morphological Analysis (Tem)supporting

confidence: 51%

See 1 more Smart Citation

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Chen¹,

Lee²,

Hamid³

2016

BioResources

View full text Add to dashboard Cite

show abstract

“…Its properties depend on the polyether/polyamide ratio (Fakirov 2005;. Qua and Hornsby (2011) worked on reinforcing Polyamid-6 by nanocellulose, but there is no report about preparing a nanocomposite by Pebax reinforced with nanocellulose.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cellulose Nanofibers Reinforced Polyether-b-Amide Nanocomposite

et al. 2017

View full text Add to dashboard Cite

A new kind of thermoplastic elastomer nanocomposite reinforced with cellulose nanofibers has been reported. The aim of this investigation was to study the interaction and dispersion of cellulose nanofibers into the Pebax matrix. These copolymers are considered as polyether-b-amide thermoplastic elastomers. They are from renewable resources, and their hydrophilic character allows them to interact with nanocellulose. The interaction and reinforcement effect of nanocellulose at 3 levels of nanocellulose, (1%, 3%, and 5%), were examined by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and other mechanical tests. The results achieved from these tests indicated appropriate effects of cellulose nanofibers for the strong interaction and close contact with the polyamide phase of the Pebax polymer via strong hydrogen bonding.

show abstract

“…Em paralelo a esse cenário, pesquisadores têm focado seus trabalhos no processamento de nanocompósitos, devido aos fortes efeitos de reforço a uma fração de volume baixo [5][6][7][8][9]. Na nanoescala surgem novos fenômenos que não aparecem na macroescala.…”

unclassified

Estudo da estabilidade térmica e propriedades mecânicas de nanocompósitos de poliamida 6,6 com nanofibras de celulose

Benaducci

Branciforti

2016

Matéria (Rio J.)

View full text Add to dashboard Cite

RESUMONeste estudo, a estabilidade térmica e as propriedades mecânicas da poliamida 6,6 (PA) e de seus nanocompósitos com nanofibras de celulose (NFC) foram investigadas. Objetivando a dispersão uniforme da NFC na PA e o processamento a altas temperaturas, os materiais foram inicialmente pré-misturados em solução e posteriormente processados por extrusão e moldagem por injeção. Os resultados obtidos por análise termogravimétrica confirmaram a maior estabilidade térmica das amostras sem NFC em relação as amostras com NFC. A pré-mistura e o processamento influenciaram na estabilidade térmica das amostras. Os resultados obtidos por ensaio de tração revelaram que a adição de 1% de NFC levou a um aumento médio de 16% no módulo elástico em relação a PA pura. A pré-mistura e a incorporação das NFC´s não prejudicaram o módulo elástico e a resistência máxima à tração, podendo indicar uma alternativa de uso para poliamida 6,6, dependendo da aplicação final do material.Palavras-chave: Nanofibras de celulose, poliamida 6,6, nanocompósitos estabilidade térmica, propriedades mecânicas. ABSTRACTIn this study, the thermal stability and mechanical properties of polyamide 6.6 (PA) and their nanocomposites with cellulose nanofibers (CNF) were investigated. In order to have uniform dispersion of CNF in the PA and the processing at high temperatures, the materials were initially premixed and further processed by extrusion and injection molding. The results obtained by thermogravimetric analysis confirmed the lower thermal stability of the samples without CNF in comparison to the samples with CNF. The premix and the processing influence on the thermal stability of the samples. The results obtained by tensile test showed the addition of 1% CNF leads to an average increase of 16% in the elastic modulus in comparison to the neat PA. The premix and the incorporation of CNF did not impair the elastic modulus and maximum tensile strength, and may indicate an alternative use for PA, depending on the final application of the material.

show abstract

Preparation and characterisation of nanocellulose reinforced polyamide-6

Cited by 45 publications

References 28 publications

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Preparation of Nanostructured Cellulose via Cr(III)- and Mn(II)-Transition Metal Salt Catalyzed Acid Hydrolysis Approach

Preparation of Cellulose Nanofibers Reinforced Polyether-b-Amide Nanocomposite

Estudo da estabilidade térmica e propriedades mecânicas de nanocompósitos de poliamida 6,6 com nanofibras de celulose

Contact Info

Product

Resources

About