Investigation of the co-coagulation of natural rubber latex and cellulose nanocrystals aqueous dispersion

Mekonnen, Tizazu H.; Ah-Leung, Tracyl; Hojabr, Sassan; Berry, Richard M.

doi:10.1016/j.colsurfa.2019.123949

Cited by 44 publications

(16 citation statements)

References 57 publications

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“…After centrifugation, the protein content of NRL was determined according to ASTM D5712-10. As observed by Mekonnen et al (2019) [18], negatively charged proteins in the layer covering the rubber particles bind to positively charged oligoHEC when the pH of rubber latex is higher than the isoelectric point of the rubber. Once this bond is formed, the proteins can be easily separated from the NRL through centrifugation.…”

Section: Removing Proteins In Natural Rubber Latex With Oligohecmentioning

confidence: 81%

Adjusting the Low Molecular Weight of Hydroxyethyl Cellulose and Applied to Extract Proteins in Natural Rubber Latex

Dung

Tuan

2021

Vietnam J. Sci. Technol.

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Natural rubber latex (NRL) with “low protein content” is regarded as less allergenic latex for medical gloves, medical products, condoms, etc. Therefore, this study was conducted to strengthen the fundamental approach of making “low protein NRL” via oligosaccharide hydroxyl ethyl cellulose (oligoHEC) treatment. OligoHEC (Mw ~10,000 g/mol) is degradation product of HEC (Mw ~90,000 g/mol) by 1.5% H2O2 treatment combined with hydrothermal at temperature for 30 minutes at 121°C, pressurized rate of 0.38 mPa by autoclave equipment. OligoHECs were employed to form electrical bonds with the proteins. The target of this study is protein content of NRL ≤ 50 µg/g of rubber, we surveyed the effect of oligoHEC treatment towards the solution proteins content of NRL. Results show that oligoHEC at low concentration (0.25%) effectively extracted the proteins molecules. Interestingly, allergenic proteins content of NRL serum was decreased proportionally (< 50 µg/g of rubber) with the upsurge of oligoHEC concentration, suggesting deactivation of allergenic. These preliminary results indicate a potential approach to produce low allergenic risk NRL products with adding of oligoHEC

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Section: Removing Proteins In Natural Rubber Latex With Oligohecmentioning

confidence: 81%

Adjusting the Low Molecular Weight of Hydroxyethyl Cellulose and Applied to Extract Proteins in Natural Rubber Latex

Dung

Tuan

2021

Vietnam J. Sci. Technol.

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“…In fact, the NCC suspension is stabilized by electrostatic repulsion arising from partially charged sulfate ester groups (SO 3− ) which were introduced onto the NCC surface during the sulfuric acid hydrolysis step [ 36 ] . Moreover, thin NRL phospholipid and protein membranes carry negative charges providing more electrostatic repulsion to improve the NCC/NRL suspension stability [ 37 ] . Therefore, after casting and evaporation, a uniform filler dispersion is expected for NCC/NR nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

Hybrid nanocellulose/carbon nanotube/natural rubber nanocomposites with a continuous three‐dimensional conductive network

Kazemi

Mighri

Park³

et al. 2022

Polymer Composites

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In this study, the hybrid effect of nanocellulose/carbon nanotube (NCC/CNT) reinforcement on natural rubber (NR) nanocomposites was investigated. To this end, three series of NR nanocomposites were prepared: NCC/NR, CNT/NR and NCC/CNT/NR. First, the nanocomposites morphology and the filler–rubber interactions were studied using scanning electron microscopy (SEM) and the swelling behavior in toluene, respectively. The results showed that the presence of NCC improved the NCC/CNT hybrid filler dispersion forming a 3D network, while the presence of CNT increased the filler–matrix interaction. The curing results also confirmed that the degree of crosslinking increased when hybrid fillers were used, but the curing time was not modified. In addition, it was observed that using a NCC/CNT hybrid system led to superior mechanical properties, dynamic mechanical properties and thermal conductivity than each material used separately. When 10 phr hybrid filler (with a filler ratio of 1) was added to NR, the tensile strength, modulus at 300% elongation (M300), storage modulus at 10% strain and thermal conductivity were all increased by 57%, 137%, 120%, and 30%, respectively. The results also showed that the NR nanocomposites properties can be controlled by tuning the NCC/CNT filler ratio.

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“…Regardless of how nanocellulose is incorporated, its high aspect ratio enables good stress transfer and rheological control of particle dispersions at small concentrations. [113] In nearly all instances, nanocellulose in latexes improves mechanical strength and can improve the stability, [114][115][116][117][118][119] wettability, [120][121][122][123] adhesive performance, [109,119,124,125] and thermal stability [122,[126][127][128][129][130] of dried films cast from nanocomposite latexes.…”

Section: Overview Of Nanocellulose Roles In Emulsions and Heterogeneomentioning

confidence: 99%

Nanocellulose in Emulsions and Heterogeneous Water‐Based Polymer Systems: A Review

et al. 2020

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Investigation of the co-coagulation of natural rubber latex and cellulose nanocrystals aqueous dispersion

Cited by 44 publications

References 57 publications

Adjusting the Low Molecular Weight of Hydroxyethyl Cellulose and Applied to Extract Proteins in Natural Rubber Latex

Adjusting the Low Molecular Weight of Hydroxyethyl Cellulose and Applied to Extract Proteins in Natural Rubber Latex

Hybrid nanocellulose/carbon nanotube/natural rubber nanocomposites with a continuous three‐dimensional conductive network

Nanocellulose in Emulsions and Heterogeneous Water‐Based Polymer Systems: A Review

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