Effect of protein on the thermogenesis performance of natural rubber matrix

Zhan, Yue-Hua; Wei, Yinmao; Tian, Jingjing; Gao, Yuanyuan; Luo, Ming‐Chao; Liao, Shuangquan

doi:10.1038/s41598-020-73546-7

Cited by 12 publications

(7 citation statements)

References 45 publications

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“…The results revealed the highest efficacy of DPP in reducing the scorch time and cure time of the rubber compounds. This may be attributed to the fact that DPP had a relatively high protein content (~49%), which could accelerate the sulfur vulcanization of the isoprene rubber, according to the literature [ 51 , 52 , 53 , 54 ]. It has recently been reported that proteins decrease the activation energy of the crosslinking process through the formation of coordination interactions between Zn 2+ and amide bonds of proteins, which improves the solubility of Zn 2+ in the matrix and further contributes to the crosslinking reaction [ 55 ].…”

Section: Resultsmentioning

confidence: 99%

Characterization and Application in Natural Rubber of Leucaena Leaf and Its Extracted Products

Klongklaew,

Khamjapo,

Sae-Oui

et al. 2023

Polymers

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Leucaena is a fast-growing tree in the legume family. Its leaf contains a significant amount of protein and is thus widely used as fodder for cattle. To broaden its application in the rubber field, the effects of Leucaena leaf powder and its extracted products on the cure characteristics and mechanical properties of natural rubber were investigated. The extraction of Leucaena leaf was carried out by using a proteolytic enzyme at 60 °C. The digested protein was separated from the residue by centrifugation. Both digested protein and residue were then dried and ground into powder, namely digested protein powder and residual powder, respectively, before being characterized by Fourier transform infrared spectroscopy, scanning electron microscope, thermogravimetric analysis, X-ray diffraction, particle size determination, and protein analysis. After being added to natural rubber at 3 parts per hundred rubber, they significantly reduced both the scorch time and the optimum cure time of the rubber compounds, probably due to the presence of nitrogen-containing substances, without a significant sacrifice of the mechanical properties. For instance, the optimum cure time decreased by approximately 25.5, 35.4, and 54.9% for Leucaena leaf powder, residual powder, and digested protein powder, respectively. Thus, they can be used as green and sustainable fillers with a cure-activation effect in rubber compounding.

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Section: Resultsmentioning

confidence: 99%

Characterization and Application in Natural Rubber of Leucaena Leaf and Its Extracted Products

Klongklaew,

Khamjapo,

Sae-Oui

et al. 2023

Polymers

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“… 46 In addition, the AMP in the NRL-GI-AMP film is a protein with a short-chain structure and has an antiaging effect, so the heat resistance of the NRL-GI-AMP film is higher than that of the NRL-GI film. 47 Zhan et al ( 48 ) reported that the addition of soy protein to natural rubber can promote the construction of a vulcanization network, increase the rigidity of the rubber, and reduce the breakage of the rubber chain.…”

Section: Resultsmentioning

confidence: 99%

Glycerol and Antimicrobial Peptide-Modified Natural Latex for Bacteriostasis of Skin Wounds

Wang

et al. 2022

ACS Omega

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This work aimed to develop a glycerol antimicrobial peptide natural latex film (NRL-GI-AMP film) for the treatment of skin wound infections. The contents of this work mainly include investigating the effect of adding glycerol (GI) and an antimicrobial peptide (AMP) on the physical and chemical properties of natural latex (NRL) and analyzing the cytocompatibility, bacteriostatic activity, and infected wound healing promotion of the NRL-GI-AMP film. The results showed that the addition of GI resulted in more pores in the internal structure of the NRL film, while the addition of G(LLKK)3L AMP did not change the structure and properties of the NRL film. Compared with that of the NRL film, the infrared spectrum of the NRL-GI-AMP film did not produce new characteristic peaks, indicating that GI and AMP were non-covalently cross-linked with NRL. Addition of 10% GI reduces the toughness of the NRL-GI-AMP film by 62.0%, increases the water vapor transmission rate by 8.95 mg/(cm2·h), and reduces the water absorption and water retention distributions by 33.0 and 24.7%, respectively. AMP in the NRL-GI-AMP film could be released continuously for 40 h, and the release rate was about 45%. The NRL-GI-AMP film showed good biocompatibility and antibacterial activity and promoted the healing of infected wounds. Therefore, the NRL-GI-AP film has potential application in the development of dressings to inhibit skin wound infection and promote wound healing.

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“…28 However, the insignificant change in strain values after the irradiation might likely be due to the presence of proteins in NR, which limit the compactness of the rubber network. 29 Based on these results, the crosslinking process under vacuum could be enhanced by preserving the irradiated blend and preventing oxidative degradation in vulcanized NR/SIS blend films. Ambient oxygen primarily participates in the radical termination process, 30 while oxygen facilitates oxidative degradation through a peroxide radical mechanism.…”

Section: Gel Content Crosslink Density Thermal and Mechanical Propert...mentioning

confidence: 96%

“…A similar synergistic effect between non-rubber and rubber components has been found previously. 29 The 13 C-NMR spectra were recorded to analyze the chemical structure based on carbon groups of the neat NR and NR/SIS blends. As shown in Figure 6, the carbon signals detected at δ = 32.23, 135.16, 125.03, 26.38, and 23.4 ppm corresponded to C1, C2, C3, C4, and C5 of cis-1,4-PI.…”

Section: Monitoring Chemical Structure and Crystallinity Of Vulcanize...mentioning

confidence: 99%

Optimizing natural rubber blends for examination gloves: Vacuum radiation for mechanical strength and solvent barrier

Lazim,

Shamsudin,

Hidzir

et al. 2023

J of Applied Polymer Sci

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Natural rubber (NR) is emblematic of sustainability compared to synthetic rubber. However, the tradition of adding sulfur as a vulcanization ingredient results in the release of toxic substances and the potential for health issues. In this study, a feasible strategy was proposed to replace sulfur and discover a safe bulk modification process for NR films. The results have shown that the NR particle size was disintegrated to below 10 nm by gamma irradiation. High tension strength up to 24.45 MPa was observed in the vulcanized NR blend film, which could be elongated up to 800% strain after exposure to an optimum dose of 14 kGy. In comparison to commercial NR latex and nitrile gloves, the vulcanized NR/ SIS films exhibited better chemical resistance ability against hexane, methanol, toluene, and acetone, as revealed by the permeation test. The appearance of amorphous regions and highly oriented NR crystallites was observed through transmission electron microscopy. Findings from this study propose the vacuum radiation strategy that can replace conventional vulcanization methods, resulting in NR films with high mechanical and barrier performance. Furthermore, the emission of toxic substances is reduced by this green process, making it practically useful for potential chemical‐resistant examination glove applications.

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Effect of protein on the thermogenesis performance of natural rubber matrix

Cited by 12 publications

References 45 publications

Characterization and Application in Natural Rubber of Leucaena Leaf and Its Extracted Products

Characterization and Application in Natural Rubber of Leucaena Leaf and Its Extracted Products

Glycerol and Antimicrobial Peptide-Modified Natural Latex for Bacteriostasis of Skin Wounds

Optimizing natural rubber blends for examination gloves: Vacuum radiation for mechanical strength and solvent barrier

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