1
|
Hong Dao NP, Nguyen TH, Watari T, Hatamoto M, Tan NM, Huong NL, Yamaguchi T. Investigate the anaerobic degradation of high-acetone latex wastewater with magnetite supplement. CHEMOSPHERE 2023; 339:139626. [PMID: 37487980 DOI: 10.1016/j.chemosphere.2023.139626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/24/2023] [Accepted: 07/21/2023] [Indexed: 07/26/2023]
Abstract
This study evaluated the effects of acetone on the anaerobic degradation of synthetic latex wastewater, which was simulated from the wastewater of the deproteinized natural rubber production process, including latex, acetate, propionate, and acetone as the main carbon sources, at a batch scale in 5 cycles of a total of 60 days. Fe3O4 was applied to accelerate the treatment performance from cycle 3. Acetone was added in concentration ranges of 0%, 0.05%, 0.1%, 0.15%-included latex, and 0.15%-free latex (w/v). In the Fe3O4-free cycles, for latex-added vials, soluble chemical oxygen demand (sCOD) was removed at 43.20%, 43.20%, and 12.65%, corresponding to the input acetone concentrations varying from 0.05% to 0.15%, indicating the interference of acetone for COD reduction. After adding Fe3O4, all flasks reported a significant increase in COD removal efficiency, especially for acetone-only and latex-only vials, from 36.9% to 14.30%-42.95% and 83.20%, respectively. Other highlighted results of COD balance showed that Fe3O4 involvement improved the degradation process of acetate, propionate, acetone, and the other COD parts, including the intermediate products of latex reduction. Besides, during the whole batch process, the order of reduction priority of the carbon sources in the synthetic wastewater was acetate, propionate and acetone. We also found that the acetate concentration appeared to be strongly related to reducing other carbon sources in natural rubber wastewater. Microbial community analysis revealed that protein-degrading bacteria Bacteroidetes vadinHA17 and Proteinniphilum and methylotrophic methanogens might play key roles in treating simulated deproteinized-natural-rubber wastewater.
Collapse
Affiliation(s)
- Nguyen Pham Hong Dao
- Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, 940-2188, Japan
| | - Thu Huong Nguyen
- Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, 940-2188, Japan
| | - Takahiro Watari
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, 940-2188, Japan; School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 11600, Viet Nam.
| | - Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, 940-2188, Japan
| | - Nguyen Minh Tan
- Institute for R&D of Natural Products, Hanoi University of Science and Technology, Hanoi, 11600, Viet Nam
| | - Nguyen Lan Huong
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, 11600, Viet Nam
| | - Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, 940-2188, Japan; Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, 940-2188, Japan; School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 11600, Viet Nam
| |
Collapse
|
2
|
Jayadevan J, Manathanath M, Mathew MM, Panicker UG. Effect of glycerol and dibutyl phthalate on modified natural rubber latex based drug delivery systems. Int J Biol Macromol 2023; 231:123286. [PMID: 36690239 DOI: 10.1016/j.ijbiomac.2023.123286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/25/2022] [Accepted: 01/11/2023] [Indexed: 01/21/2023]
Abstract
The work highlights the impact of the incorporation of two pharmaceutical plasticizers viz.; glycerol (GLY; hydrophilic) and dibutyl phthalate (DBP; hydrophobic) on the controlled drug release features of a deproteinised natural rubber latex (DNRL) -based matrix. The effects of the plasticizers on the mechanical properties, glass transition temperature (Tg), water absorption behaviour and porosity of DNRL have been initially investigated. The plasticized membranes have been found to show a hemolysis percentage (HP) of <5 %; confirming its compatibility with human blood. The potential of the modified DNRL membranes to function as drug carriers have been examined with metformin hydrochloride (MET) as a model drug.
Collapse
|
3
|
Boon ZH, Teo YY, Ang DTC. Recent development of biodegradable synthetic rubbers and bio-based rubbers using sustainable materials from biological sources. RSC Adv 2022; 12:34028-34052. [PMID: 36545000 PMCID: PMC9710532 DOI: 10.1039/d2ra06602e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 11/21/2022] [Indexed: 12/02/2022] Open
Abstract
Rubber is an amorphous hyperelastic polymer which is widely used in this modern era. Natural rubber is considered the ultimate rubber in terms of mechanical performance, but over the years, some limitations and challenges in natural rubber cultivation that could result in serious shortages in the supply chain had been identified. Since then, the search for alternatives including new natural and synthetic rubbers has been rather intense. The initiative to explore new sources of natural rubber which started during the 1940s has been reignited recently due to the increasing demand for natural rubber. The commercialization of natural rubber from the Parthenium argentatum and Taraxacum kok-saghyz species, with the cooperation from rubber product manufacturing companies, has somewhat improved the sustainability of the natural rubber supply chain. Meanwhile, the high demand for synthetic rubber drastically increases the rate of depletion of fossil fuels and amplifies the adverse environmental effect of overexploitation of fossil fuels. Moreover, rubber and plastic products disposal have been a major issue for many decades, causing environmental pollution and the expansion of landfills. Sustainable synthetic rubber products could be realized through the incorporation of materials from biological sources. They are renewable, low cost, and most importantly, biodegradable in nature. In this review, brief introduction to natural and synthetic rubbers, challenges in the rubber industry, alternatives to conventional natural rubber, and recent advances in biodegradable and/or bio-based synthetic rubbers are discussed. The effect of incorporating various types of biologically sourced materials in the synthetic rubbers are also elaborated in detail.
Collapse
Affiliation(s)
- Zhen Hern Boon
- Department of Chemistry, Universiti Malaya50603 Kuala LumpurMalaysia
| | - Yin Yin Teo
- Department of Chemistry, Universiti Malaya50603 Kuala LumpurMalaysia
| | | |
Collapse
|
4
|
Yuan C, Sun J, Tian X, Yuan Y. Preparation of high‐performance deproteinized natural rubber/chitosan composite films via a green and sulfur‐free method. J Appl Polym Sci 2022. [DOI: 10.1002/app.53253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Changcheng Yuan
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Jinyu Sun
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Xiaohui Tian
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| | - Yizhong Yuan
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering East China University of Science and Technology Shanghai China
| |
Collapse
|
5
|
Hernandez-Tenorio F, Arroyave-Miranda H, Miranda AM, González SM, Rodríguez CA, Sáez AA. Improving Deproteinization in Colombian Latex from Hevea brasiliensis: A Bibliometric Approximation. Polymers (Basel) 2022; 14:polym14194248. [PMID: 36236196 PMCID: PMC9573318 DOI: 10.3390/polym14194248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/05/2022] [Accepted: 10/06/2022] [Indexed: 01/30/2023] Open
Abstract
Natural Rubber Field Latex (NRFL) allergens restrict its use in some markets due to health-threatening allergic reactions. These molecules are proteins that are related to asymptomatic sensitization and hypersensitivity mediated by immunoglobulin E (IgE). Although NRFL allergens have been investigated since the 1980s, there are still gaps in knowledge regarding the development of deproteinized natural rubber (DPNR). Therefore, in this study, the deproteinization of NRFL from the lower basin of the Cauca River, Antioquia-Colombia was evaluated using eight systems. The highest removal value was 84.4% and was obtained from the treatment containing SDS (Sodium dodecyl sulfate), Urea, and Ethanol. It was also possible to determine that at high concentrations of SDS, removal percentages higher than 70% are reached. On the other hand, all deproteinizing systems decreased NRFL Zeta potentials without self-coagulation, suggesting enhanced colloidal stability in DPNR latex. On the other hand, the bibliometric analysis presented technological advances in DPRN through different parameters and bibliometric networks. The analysis presented makes an important contribution from the bibliometric approach that could be positive for the development of research on DPNR.
Collapse
Affiliation(s)
| | | | - Alejandra M. Miranda
- Biological Sciences and Bioprocesses Group, School of Applied Sciences and Engineering, Universidad de EAFIT, Medellín 050022, Colombia
| | - Sandra M. González
- School of Applied Sciences and Engineering, Universidad EAFIT, Medellín 050022, Colombia
| | - Carlos A. Rodríguez
- Engineering, Energy, Exergy and Sustainability Group (IEXS), School of Applied Sciences and Engineering, Universidad EAFIT, Medellín 050022, Colombia
| | - Alex A. Sáez
- Biological Sciences and Bioprocesses Group, School of Applied Sciences and Engineering, Universidad de EAFIT, Medellín 050022, Colombia
- Correspondence:
| |
Collapse
|
6
|
The role of natural rubber endogenous proteins in promoting the formation of vulcanization networks. E-POLYMERS 2022. [DOI: 10.1515/epoly-2022-0043] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Non-rubber components are critical in the formation of the natural rubber (NR) vulcanization network, which leads to outstanding mechanical properties of NR. This study reports the effect of NR endogenous proteins (C-serum protein/lutoid protein [CSP/LP]) on the formation of vulcanization networks at the molecular level. Results indicate that CSP/LP has a positive effect on vulcanization. Fourier-transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses demonstrate that the decrease in vulcanization time of CSP/LP is ascribed to coordination interaction between Zn2+ and amide bond. The interaction increases the availability of ZnO in the matrix, thereby promoting the formation of the vulcanized network. CSP/LP also participates in the construction of the vulcanization network as a new crosslinking point, thus increasing crosslinking density and improving the mechanical properties of the NR. This study provides new research ideas for studying the relationship among component–structure–property of NR materials and developing high-strength and high-toughness elastomer materials.
Collapse
|
7
|
Gibu N, Linh DV, Suzuki N, Thuy Ngan NT, Fukuda M, Anh TK, Huong NL, Kasai D. Identification and transcriptional analysis of poly(cis-1,4-isoprene) degradation gene in Rhodococcus sp. strain RDE2. J Biosci Bioeng 2022; 133:452-458. [PMID: 35216932 DOI: 10.1016/j.jbiosc.2022.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/13/2022] [Accepted: 01/30/2022] [Indexed: 11/30/2022]
Abstract
The microbial degradation of synthetic and natural poly(cis-1,4-isoprene) rubber is expected to become an alternative treatment technique for waste from poly(cis-1,4-isoprene) products, such as scrap tires. A gram-positive rubber-degrading bacterium, Rhodococcus sp. strain RDE2, was isolated from the waste of a rubber-processing factory in Vietnam. This strain grew on natural rubber as a sole source of carbon and energy and produced oligo-isoprenoid metabolites containing aldehyde groups from poly(cis-1,4-isoprene). To identify the genes responsible for poly(cis-1,4-isoprene) degradation, the complete genome sequence of this strain was determined. The complete genome sequence consists of a 5,715,406 bp chromosome and 6 plasmids (GenBank accession numbers AP025186.1 to AP025192.1) with an average GC content of 67.9%. The genome contains 5358 protein-coding sequences and 12 and 68 copies of rRNA and tRNA genes, respectively. Based on genome sequence analysis, the lcp gene (RDE2_08,770), responsible for the initial step of poly(cis-1,4-isoprene) degradation, was identified. The gene product obtained from Escherichia coli depolymerizes poly(cis-1,4-isoprene) to low-molecular-weight oligo-isoprenoids. The transcription of this gene is activated during the utilization of poly(cis-1,4-isoprene) in strain RDE2. The lcpR gene (RDE2_08,760), which encodes a putative transcriptional regulator, is located upstream of lcp. The lcpR gene product recognizes the promoter region of lcp. When the lcpR gene is deleted, the constitutive transcription of lcp is observed. Thus, it is inferred that the LcpR negatively regulates lcp transcription. These results strongly suggest that the lcp and lcpR genes are involved in poly(cis-1,4-isoprene) utilization in strain RDE2.
Collapse
Affiliation(s)
- Namiko Gibu
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
| | - Dao Viet Linh
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan; School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, Viet Nam
| | - Natsuhei Suzuki
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
| | - Nguyen Thi Thuy Ngan
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan; School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, Viet Nam
| | - Masao Fukuda
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
| | - To Kim Anh
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, Viet Nam
| | - Nguyen Lan Huong
- School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, Viet Nam
| | - Daisuke Kasai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan.
| |
Collapse
|
8
|
Thi Nghiem T, Nguyen TN, Yusof NH, Kawahara S. Effect of naturally occurring proteins on graft copolymerization of vinyltriethoxysilane on natural rubber. Polym J 2022. [DOI: 10.1038/s41428-022-00616-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
9
|
Study of Aquilaria crassna Wood as an Antifungal Additive to Improve the Properties of Natural Rubber as Air-Dried Sheets. Polymers (Basel) 2021; 13:polym13234178. [PMID: 34883681 PMCID: PMC8659759 DOI: 10.3390/polym13234178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/26/2021] [Accepted: 11/27/2021] [Indexed: 11/16/2022] Open
Abstract
Fungal growth on rubber sheets confers inferior properties and an unpleasant odor to raw natural rubber (NR) and products made from it, and it causes environmental concerns. The purpose of the present work was to investigate the effects of Aquilaria crassna wood (ACW) on the antifungal, physical and mechanical properties of NR as air-dried sheets (ADS) and ADS filled with ACW. The results show that the ACW-filled ADS had an increased Mooney viscosity, initial plasticity (PO), and high thermo-oxidation plasticity (i.e., high plasticity retention index PRI). Additionally, superior green strength was observed for the ACW-filled ADS over the ADS without additive because of chemical interactions between lignin and proteins in NR molecules eliciting greater gel formation. A significant inhibition of fungal growth on the NR products during storage over a long period (5 months) was observed for ACW-filled ADS. Thus, it can be concluded that ACW could be applied as an antifungal additive that reduces fungal growth. This is a practically important aspect for the rubber industry, as fungal growth tends to spoil and cause the loss of NR sheets during storage. Moreover, the ACW is active as an incense agent, reducing negative impacts from odors that fungi, on rubber surfaces, release. Therefore, these filled intermediate NR products provide added value through, an environmentally friendly approach, this is pleasant to customers.
Collapse
|
10
|
Akahori Y, Hiza M, Yamaguchi S, Kawahara S. PROTEIN INFLUENCE ON THE MECHANICAL PROPERTIES OF NR. RUBBER CHEMISTRY AND TECHNOLOGY 2021. [DOI: 10.5254/rct.21.79916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
ABSTRACT
Effect of protein on vulcanization of NR, obtained from Hevea brasiliensis, was investigated by analyzing the crosslinking structure of the resulting vulcanizates prepared from untreated NR, deproteinized natural rubber (DPNR), and protein-free natural rubber (PFNR) by swelling methods and rubber-state NMR spectroscopy. The proteins present in NR were removed by three methods: deproteinization with enzyme, urea, or urea–acetone in the presence of sodium dodecyl sulfate. The amount of proteins present in NR, approximately 0.238 w/w%, was reduced to 0.000 w/w% by urea–acetone deproteinization, whereas it was reduced to approximately 0.003 and 0.019 w/w% by enzyme and urea deproteinizations, respectively. Hardness, swelling degree, and crosslinking structure depended on the amount of proteins. Changes in mechanical properties for the vulcanizates prepared from not only non-filler compounds but also carbon black–filled and silica-filled compounds were attributed to the amount of proteins.
Collapse
Affiliation(s)
- Yayoi Akahori
- Yokohama Rubber Co., Ltd., Hiratsuka, Kanagawa, Japan
| | - Misao Hiza
- Yokohama Rubber Co., Ltd., Hiratsuka, Kanagawa, Japan
| | - Soki Yamaguchi
- Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Seiichi Kawahara
- Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology, Nagaoka, Japan
| |
Collapse
|
11
|
Zhan YH, Wei YC, Tian JJ, Gao YY, Luo MC, Liao S. Effect of protein on the thermogenesis performance of natural rubber matrix. Sci Rep 2020; 10:16417. [PMID: 33009499 PMCID: PMC7532221 DOI: 10.1038/s41598-020-73546-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 09/14/2020] [Indexed: 12/03/2022] Open
Abstract
Under high-speed strain, the thermogenesis performance of natural rubber products is unstable, leading to aging and early failure of the material. The quality of rubber latex and eventually that of the final products depends among others on the protein content. We found that when the protein is almost removed, the heat generated by the vulcanized rubber increases rapidly. After adding soy protein isolate to the secondary purification rubber, the heat generation of the vulcanized rubber is reduced, and the heat generation is the lowest when the added amount is 2.5–3.0 phr, which on account of protein promotes the construction of a vulcanization network and increases the rigidity of the rubber chain, resulting in a decrease in the potential frictional behavior of the rubber chain during the curl up-extension process.
Collapse
Affiliation(s)
- Yue-Hua Zhan
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Materials Science and Engineering, Hainan University, Haikou, China
| | - Yan-Chan Wei
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Materials Science and Engineering, Hainan University, Haikou, China
| | - Jing-Jing Tian
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Materials Science and Engineering, Hainan University, Haikou, China
| | - Yuan-Yuan Gao
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Materials Science and Engineering, Hainan University, Haikou, China
| | - Ming-Chao Luo
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Materials Science and Engineering, Hainan University, Haikou, China
| | - Shuangquan Liao
- Key Laboratory of Tropical Biological Resources of Ministry of Education, School of Materials Science and Engineering, Hainan University, Haikou, China.
| |
Collapse
|
12
|
Gibu N, Arata T, Kuboki S, Linh DV, Fukuda M, Steinbüchel A, Kasai D. Characterization of the genes responsible for rubber degradation in Actinoplanes sp. strain OR16. Appl Microbiol Biotechnol 2020; 104:7367-7376. [PMID: 32681242 PMCID: PMC7413915 DOI: 10.1007/s00253-020-10700-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/19/2020] [Accepted: 05/24/2020] [Indexed: 10/25/2022]
Abstract
A Gram-positive rubber-degrading bacterium, Actinoplanes sp. strain OR16 (strain NBRC 114529), is able to grow on agar plates containing natural and synthetic rubber as the sole sources of carbon and energy. When this strain was grown on natural rubber latex overlay agar plates, translucent halos around the cells were observed. To identify the natural rubber degradation genes and other features of its metabolism, its complete genome sequence was determined. The genome of OR16 consists of 9,293,892 bp and comprises one circular chromosome (GenBank accession number AP019371.1) with a G + C content of 70.3%. The genome contains 8238 protein-coding and 18 rRNA genes. A homology search of the genome sequence revealed that three genes (lcp1, lcp2, and lcp3) are homologous to an extracellular latex-clearing protein (Lcp) of Streptomyces sp. K30. RT-PCR analysis revealed that lcp1 and lcp2 seem to constitute an operon. Purified lcp gene products have oxygen consumption activity toward natural rubber latex, suggesting that all these genes encode rubber-degrading enzymes in OR16. Quantitative reverse transcription-PCR analysis indicated that the transcription of these genes is induced during the growth of OR16 on natural rubber. The genes located adjacent to lcp1 and lcp3, which code for a TetR/AcrR-type transcriptional regulator, can bind to the promoter regions of these lcp genes. It is suggested that the putative regulators play a role in regulating the transcription of the lcp genes. These results strongly suggested that three lcp genes are required for the utilization of natural rubber in strain OR16. Key Points • The complete genome sequence of Actinoplanes sp. strain OR16 was determined. • Three lcp genes which are involved in the natural rubber degradation in OR16 were identified. • Transcription of these lcp genes is induced during utilization of rubber in OR16. • Two regulators, which bind to the promoter regions of lcp, were determined.
Collapse
Affiliation(s)
- Namiko Gibu
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Tomoka Arata
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Saya Kuboki
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Dao Viet Linh
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan.,Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore
| | - Masao Fukuda
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan.,Department of Biological Chemistry, Chubu University, Kasugai, Aichi, 487-8501, Japan
| | - Alexander Steinbüchel
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, Münster, Germany.,Environmental Science Department, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Daisuke Kasai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan.
| |
Collapse
|
13
|
|
14
|
Shakun A, Sarlin E, Vuorinen J. Energy dissipation in natural rubber latex films: The effect of stabilizers, leaching and acetone‐treatment. J Appl Polym Sci 2020. [DOI: 10.1002/app.49609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Alexandra Shakun
- Materials Science and Environmental Engineering Tampere University Tampere Finland
| | - Essi Sarlin
- Materials Science and Environmental Engineering Tampere University Tampere Finland
| | - Jyrki Vuorinen
- Materials Science and Environmental Engineering Tampere University Tampere Finland
| |
Collapse
|
15
|
Exploring the unique characteristics of natural rubber induced by coordination interaction between proteins and Zn2+. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122357] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
16
|
Zhang N, Cao H. Enhancement of the Antibacterial Activity of Natural Rubber Latex Foam by Blending It with Chitin. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1039. [PMID: 32110858 PMCID: PMC7084390 DOI: 10.3390/ma13051039] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/11/2020] [Accepted: 02/17/2020] [Indexed: 01/08/2023]
Abstract
To enhance the antibacterial activity of natural rubber latex foam (NRLF), chitin was added during the foaming process in amounts of 1-5 phr (per hundred rubber) to prepare an environmentally friendly antibacterial NRLF composite. In this research, NRLF was synthesized by the Dunlop method. The swelling, density, hardness, tensile strength, elongation at break, compressive strength and antibacterial activity of the NRLFs were characterized. FTIR and microscopy were used to evaluate the chemical composition and microstructure of the NRLFs. The mechanical properties and antibacterial activity of the NRLF composites were tested and compared with those of pure NRLF. The antibacterial activity was observed by the inhibition zone against E. coli. NRLF composite samples were embedded in a medium before solidification. The experimental results of the inhibition zone indicated that with increasing chitin content, the antibacterial activity of the NRLF composites increased. When the chitin content reached 5 phr, the NRLF composite formed a large and clear inhibition zone in the culture dish. Moreover, the NRLF-5 phr chitin composite improved the antibacterial activity to 281.3% of that of pure NRLF against E. coli.
Collapse
Affiliation(s)
| | - Hui Cao
- Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
| |
Collapse
|
17
|
Nun‐anan P, Wisunthorn S, Pichaiyut S, Nathaworn CD, Nakason C. Influence of nonrubber components on properties of unvulcanized natural rubber. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4746] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Phattarawadee Nun‐anan
- Faculty of Science and Industrial TechnologyPrince of Songkla University, Surat Thani Campus Surat Thani 84000 Thailand
| | - Suwaluk Wisunthorn
- Faculty of Science and Industrial TechnologyPrince of Songkla University, Surat Thani Campus Surat Thani 84000 Thailand
| | - Skulrat Pichaiyut
- Faculty of Science and Industrial TechnologyPrince of Songkla University, Surat Thani Campus Surat Thani 84000 Thailand
| | | | - Charoen Nakason
- Faculty of Science and Industrial TechnologyPrince of Songkla University, Surat Thani Campus Surat Thani 84000 Thailand
| |
Collapse
|
18
|
Potivara K, Phisalaphong M. Development and Characterization of Bacterial Cellulose Reinforced with Natural Rubber. MATERIALS 2019; 12:ma12142323. [PMID: 31330890 PMCID: PMC6678885 DOI: 10.3390/ma12142323] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/09/2019] [Accepted: 07/17/2019] [Indexed: 11/16/2022]
Abstract
Films of bacterial cellulose (BC) reinforced by natural rubber (NR) with remarkably high mechanical strength were developed by combining the prominent mechanical properties of multilayer BC nanofibrous structural networks and the high elastic hydrocarbon polymer of NR. BC pellicle was immersed in a diluted NR latex (NRL) suspension in the presence of ethanol aqueous solution. Effects of NRL concentrations (0.5%–10% dry rubber content, DRC) and immersion temperatures (30–70 °C) on the film characteristics were studied. It was revealed that the combination of nanocellulose fibrous networks and NR polymer provided a synergistic effect on the mechanical properties of NR–BC films. In comparison with BC films, the tensile strength and elongation at break of the NR–BC films were considerably improved ~4-fold. The NR–BC films also exhibited improved water resistance over that of BC films and possessed a high resistance to non-polar solvents such as toluene. NR–BC films were biodegradable and could be degraded completely within 5–6 weeks in soil.
Collapse
Affiliation(s)
- Kornkamol Potivara
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Muenduen Phisalaphong
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand.
| |
Collapse
|
19
|
Linh DV, Gibu N, Tabata M, Imai S, Hosoyama A, Yamazoe A, Kasai D, Fukuda M. Complete genome sequence of natural rubber-degrading, gram-negative bacterium, Rhizobacter gummiphilus strain NS21 T. ACTA ACUST UNITED AC 2019; 22:e00332. [PMID: 31011550 PMCID: PMC6460296 DOI: 10.1016/j.btre.2019.e00332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/14/2019] [Accepted: 03/29/2019] [Indexed: 11/29/2022]
Abstract
The genome sequence of rubber-degrading Rhizobacter gummiphilus NS21T was determined. An alternative rubber-degrading gene (latA2) was identified. β-oxidation pathway genes which is involved in the rubber degradation were predicted.
Gram-negative natural rubber-degrader, Rhizobacter gummiphilus NS21T, which was isolated from soil in the botanical garden in Japan, is a newly proposed species of genus of Rhizobacter. It has been reported that the latA1 gene is involved in the natural rubber degradation in this strain. To gain novel insights into natural rubber degradation pathway, the complete genome sequence of this strain was determined. The genome of strain NS21T consists of 6,398,096 bp of circular chromosome (GenBank accession number CP015118.1) with G + C content of 69.72%. The genome contains 5687 protein-coding and 68 RNA genes. Among the predicted genes, 4810 genes were categorized as functional COGs. Homology search revealed that existence of latA1 homologous gene (latA2) in this genome. Quantitative reverse-transcription-PCR and deletion analyses indicated that natural rubber degradation of this strain requires latA2 as well as latA1.
Collapse
Affiliation(s)
- Dao Viet Linh
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Namiko Gibu
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Michiro Tabata
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Shunsuke Imai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| | - Akira Hosoyama
- Biological Resource Center, National Institute of Technology and Evaluation, Kisarazu, Chiba, 292-0818, Japan
| | - Atsushi Yamazoe
- Biological Resource Center, National Institute of Technology and Evaluation, Kisarazu, Chiba, 292-0818, Japan
| | - Daisuke Kasai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
- Corresponding author.
| | - Masao Fukuda
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, 940-2188, Japan
| |
Collapse
|
20
|
Jayadevan J, Unnikrishnan G. Novel membranes from physico-chemically modified deproteinized natural rubber latex: development, characterisation and drug permeation. NEW J CHEM 2018. [DOI: 10.1039/c8nj01523f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Novel blend membranes from physico-chemically modified deproteinized natural rubber latex for drug release applications.
Collapse
Affiliation(s)
- Janisha Jayadevan
- Polymer Science and Technology Research Laboratory
- Dept. of Chemistry
- National Institute of Technology Calicut
- NITC Campus
- Kozhikode
| | - G. Unnikrishnan
- Polymer Science and Technology Research Laboratory
- Dept. of Chemistry
- National Institute of Technology Calicut
- NITC Campus
- Kozhikode
| |
Collapse
|
21
|
Deproteinised natural rubber latex grafted poly(dimethylaminoethyl methacrylate) - poly(vinyl alcohol) blend membranes: Synthesis, properties and application. Int J Biol Macromol 2017; 107:1821-1834. [PMID: 29032213 DOI: 10.1016/j.ijbiomac.2017.10.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 10/06/2017] [Accepted: 10/09/2017] [Indexed: 01/20/2023]
Abstract
Natural rubber latex was initially deproteinised (DNRL) and then subjected to physicochemical modifications to make high functional membranes for drug delivery applications. Initially, DNRL was prepared by incubating with urea, sodiumdodecylsulphate and acetone followed by centrifugation. The deproteinisation was confirmed by CHN analysis. The DNRL was then chemically modified by grafting (dimethylaminoethyl methacrylate) onto NR particles by using a redox initiator system viz; cumene hydroperoxide/tetraethylenepentamine, followed by dialysis for purification. The grafting was confirmed by dynamic light scattering, Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The grafted system was blended with a hydrophilic adhesive polymer PVA and casted into membranes. The membranes after blending showed enhanced mechanical properties with a threshold concentration of PVA. The moisture uptake, swelling and water contact angle experiments indicated an increased hydrophilicity with an increased PVA content in the blend membranes. The grafted DNRL possessed significant antibacterial property which has been found to be retained in the blended form. A notable decrease in cytotoxicity was observed for the modified DNRL membranes than the bare DNRL membranes. The in-vitro drug release studies using rhodamine B as a model drug, confirmed the utility of the prepared membranes to function as a drug delivery matrix.
Collapse
|
22
|
Kasai D, Imai S, Asano S, Tabata M, Iijima S, Kamimura N, Masai E, Fukuda M. Identification of natural rubber degradation gene in Rhizobacter gummiphilus NS21. Biosci Biotechnol Biochem 2017; 81:614-620. [DOI: 10.1080/09168451.2016.1263147] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Abstract
A Gram-negative rubber-degrading bacterium, Rhizobacter gummiphilus NS21 grew and produced aldehyde metabolites on a deproteinized natural rubber (DPNR)-overlay agar medium forming a clearing zone. A transposon-insertion mutant, which had lost the ability to degrade DPNR, was isolated to identify the rubber degradation genes. Sequencing analysis indicated that the transposon was inserted into a putative oxygenase gene, latA. The deduced amino acid sequence of latA has 36% identity with that of roxA, which encodes a rubber oxygenase of Xanthomonas sp. strain 35Y. Phylogenetic analysis revealed that LatA constitutes a distinct group from RoxA. Heterologous expression in a Methylibium host and deletion analysis of latA indicated that the latA product is responsible for the depolymerization of DPNR. The quantitative reverse transcription-PCR analysis indicated that the transcription of latA is induced during the growth on DPNR. These results strongly suggest that latA is directly involved in the degradation of rubber in NS21.
Collapse
Affiliation(s)
- Daisuke Kasai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Shunsuke Imai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Shota Asano
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Michiro Tabata
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - So Iijima
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Naofumi Kamimura
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Eiji Masai
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| | - Masao Fukuda
- Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Japan
| |
Collapse
|
23
|
Craciun G, Manaila E, Stelescu MD. New Elastomeric Materials Based on Natural Rubber Obtained by Electron Beam Irradiation for Food and Pharmaceutical Use. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E999. [PMID: 28774150 PMCID: PMC5457009 DOI: 10.3390/ma9120999] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/16/2016] [Accepted: 11/25/2016] [Indexed: 11/16/2022]
Abstract
The efficiency of polyfunctional monomers as cross-linking co-agents on the chemical properties of natural rubber vulcanized by electron beam irradiation was studied. The following polyfunctional monomers were used: trimethylolpropane-trimethacrylate, zinc-diacrylate, ethylene glycol dimethacrylate, triallylcyanurate and triallylisocyanurate. The electron beam treatment was done using irradiation doses in the range of 75 kGy-300 kGy. The gel fraction, crosslink density and effects of different aqueous solutions, by absorption tests, have been investigated as a function of polyfunctional monomers type and absorbed dose. The samples gel fraction and crosslink density were determined on the basis of equilibrium solvent-swelling measurements by applying the modified Flory-Rehner equation for tetra functional networks. The absorption tests were done in accordance with the SR ISI 1817:2015 using distilled water, acetic acid (10%), sodium hydroxide (1%), ethylic alcohol (96%), physiological serum (sodium chloride 0.9%) and glucose (glucose monohydrate 10%). The samples structure and morphology were investigated by Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy techniques.
Collapse
Affiliation(s)
- Gabriela Craciun
- Electron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Magurele, Romania.
| | - Elena Manaila
- Electron Accelerators Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Magurele, Romania.
| | - Maria Daniela Stelescu
- National R&D Institute for Textile and Leather-Leather and Footwear Research Institute, 93 Ion Minulescu St., 031215 Bucharest, Romania.
| |
Collapse
|
24
|
Kosugi K, Arai H, Zhou Y, Kawahara S. Formation of organic–inorganic nanomatrix structure with nanosilica networks and its effect on properties of rubber. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
25
|
Thuong NT, Yamamoto O, Nghia PT, Cornish K, Kawahara S. Effect of naturally occurring crosslinking junctions on green strength of natural rubber. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3887] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Nghiem Thi Thuong
- Department of Materials Science and Technology, Faculty of Engineering; Nagaoka University of Technology; 1603-1, Kamitomioka-machi Nagaoka, Niigata 940-2188 Japan
- Department of Physical Chemistry, School of Chemical Engineering; Hanoi University of Science and Technology; No. 1, Dai Co Viet Street Hai Ba Trung District Hanoi Vietnam
| | - Oraphin Yamamoto
- National Metal and Materials Technology Center; 114 Thailand Science Park Paholyothin Road Klong 1 Klong Luang Pathumthani 12120 Thailand
| | - Phan Trung Nghia
- Department of Inorganic Chemistry, School of Chemical Engineering; Hanoi University of Science and Technology; No. 1, Dai Co Viet Street Hai Ba Trung District Hanoi Vietnam
| | - Katrina Cornish
- Horiculture and Crop Science, and Food, Agricultural and Biological Engineering Ohio Agricultural Research and Development Center; The Ohio State University; Williams Hall, 1680 Madison Avenue Wooster OH USA
| | - Seiichi Kawahara
- Department of Materials Science and Technology, Faculty of Engineering; Nagaoka University of Technology; 1603-1, Kamitomioka-machi Nagaoka, Niigata 940-2188 Japan
| |
Collapse
|
26
|
Zhou Y, Kosugi K, Yamamoto Y, Kawahara S. Effect of non-rubber components on the mechanical properties of natural rubber. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3870] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yuanbing Zhou
- Department of Materials Science and Technology, Faculty of Engineering; Nagaoka University of Technology; Nagaoka Niigata 940-2188 Japan
| | - Kenichiro Kosugi
- Department of Materials Science and Technology, Faculty of Engineering; Nagaoka University of Technology; Nagaoka Niigata 940-2188 Japan
| | - Yoshimasa Yamamoto
- Department of Chemical Science and Engineering; Tokyo National College of Technology; 1220-2, Kunugida-cho Hachioji Tokyo 193-0997 Japan
| | - Seiichi Kawahara
- Department of Materials Science and Technology, Faculty of Engineering; Nagaoka University of Technology; Nagaoka Niigata 940-2188 Japan
| |
Collapse
|
27
|
Shimomura S, Matsuno H, Ohta T, Kawahara S, Tanaka K. Initial Adhesion of Fibroblasts on Thin Rubber Scaffolds. CHEM LETT 2016. [DOI: 10.1246/cl.160061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | - Seiichi Kawahara
- Department of Materials Science and Technology, Nagaoka University of Technology
| | - Keiji Tanaka
- Department of Applied Chemistry, Kyushu University
- International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
| |
Collapse
|
28
|
Musto S, Barbera V, Maggio M, Mauro M, Guerra G, Galimberti M. Crystallinity and crystalline phase orientation of poly(1,4-cis-isoprene) fromHevea brasiliensisandTaraxacum kok-saghyz. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3774] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Sara Musto
- Department of Chemistry, Materials and Chemical Engineering G. Natta; Politecnico di Milano; Via Mancinelli 7 20131 Milano (I) Italy
| | - Vincenzina Barbera
- Department of Chemistry, Materials and Chemical Engineering G. Natta; Politecnico di Milano; Via Mancinelli 7 20131 Milano (I) Italy
| | - Mario Maggio
- Department of Chemistry and Biology; Università di Salerno; Via Giovanni Paolo II 132 84084 Fisciano SA Italy
| | - Marco Mauro
- Department of Chemistry and Biology; Università di Salerno; Via Giovanni Paolo II 132 84084 Fisciano SA Italy
| | - Gaetano Guerra
- Department of Chemistry and Biology; Università di Salerno; Via Giovanni Paolo II 132 84084 Fisciano SA Italy
| | - Maurizio Galimberti
- Department of Chemistry, Materials and Chemical Engineering G. Natta; Politecnico di Milano; Via Mancinelli 7 20131 Milano (I) Italy
| |
Collapse
|
29
|
Metathesis-driven scrambling reactions between polybutadiene or naturally occurring polyisoprene and olefin-containing polyurethane. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.09.076] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
30
|
Kawahara S, Shioyama S, Nuorn C, Fukuhara L, Ishii H, Yamamoto Y, Takenaka K. Preparation and properties of phenyl-modified natural rubber. POLYM ADVAN TECHNOL 2015. [DOI: 10.1002/pat.3482] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Seiichi Kawahara
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho, Nagaoka Niigata 940-2188 Japan
| | - Shintaro Shioyama
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho, Nagaoka Niigata 940-2188 Japan
| | - Choothong Nuorn
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho, Nagaoka Niigata 940-2188 Japan
| | - Lina Fukuhara
- Department of Chemical Science and Engineering; Tokyo National College of Technology; 1220-2, Kunugida-cho, Hachioji Tokyo 193-0997 Japan
| | - Hiroyuki Ishii
- Department of Chemical Science and Engineering; Tokyo National College of Technology; 1220-2, Kunugida-cho, Hachioji Tokyo 193-0997 Japan
| | - Yoshimasa Yamamoto
- Department of Chemical Science and Engineering; Tokyo National College of Technology; 1220-2, Kunugida-cho, Hachioji Tokyo 193-0997 Japan
| | - Katsuhiko Takenaka
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho, Nagaoka Niigata 940-2188 Japan
| |
Collapse
|
31
|
FUKUHARA L, MIYANO K, YAMAMOTO Y, ISHII H, KAWAHARA S. Preparation of Purified Natural Rubber by Removal of Proteins. KOBUNSHI RONBUNSHU 2015. [DOI: 10.1295/koron.2014-0058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lina FUKUHARA
- Tokyo National College of Technology, Department of Chemical Science and Engineering
| | - Kai MIYANO
- Tokyo National College of Technology, Department of Chemical Science and Engineering
| | - Yoshimasa YAMAMOTO
- Tokyo National College of Technology, Department of Chemical Science and Engineering
| | - Hiroyuki ISHII
- Tokyo National College of Technology, Department of Chemical Science and Engineering
| | - Seiichi KAWAHARA
- Department of Materials Science and Technology, Faculty of Engineering, Nagaoka University of Technology
| |
Collapse
|
32
|
Natural rubber with nanomatrix of non-rubber components observed by focused ion beam-scanning electron microscopy. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3396-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
33
|
Organic–inorganic nanomatrix structure and properties of related naturally occurring rubbery macromolecules. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.07.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
34
|
Petrack J, Vucak M, Nover C, Epple M. Polymorphic calcium carbonate phases as adsorbents for allergens in natural rubber latex. J Appl Polym Sci 2014. [DOI: 10.1002/app.41271] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Janina Petrack
- University of Duisburg-Essen, Universitätsstr. 5-7; 45141 Essen Germany
| | - Marijan Vucak
- Schaefer Kalk GmbH and Co. KG; Louise-Seher-Str. 6 65582 Diez Germany
| | - Christoph Nover
- Schaefer Kalk GmbH and Co. KG; Louise-Seher-Str. 6 65582 Diez Germany
| | - Matthias Epple
- University of Duisburg-Essen, Universitätsstr. 5-7; 45141 Essen Germany
| |
Collapse
|
35
|
Effects of benzoyl peroxide on some properties of composites based on hemp and natural rubber. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1168-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
36
|
Danwanichakul D, Rattanaphan O, Srisatjang J, Danwanichakul P. Extraction of protein from skim natural rubber latex using PEG as a surfactant via low speed centrifugation and continuous flow. J Appl Polym Sci 2014. [DOI: 10.1002/app.39900] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Duangkamol Danwanichakul
- Center of Excellence on Natural Rubber Technology, Department of Chemical Engineering, Faculty of Engineering; Thammasat University; Pathumthani 12120 Thailand
| | - Ornthana Rattanaphan
- Center of Excellence on Natural Rubber Technology, Department of Chemical Engineering, Faculty of Engineering; Thammasat University; Pathumthani 12120 Thailand
| | - Jirarat Srisatjang
- Center of Excellence on Natural Rubber Technology, Department of Chemical Engineering, Faculty of Engineering; Thammasat University; Pathumthani 12120 Thailand
| | - Panu Danwanichakul
- Center of Excellence on Natural Rubber Technology, Department of Chemical Engineering, Faculty of Engineering; Thammasat University; Pathumthani 12120 Thailand
| |
Collapse
|
37
|
New green polymeric composites based on hemp and natural rubber processed by electron beam irradiation. ScientificWorldJournal 2014; 2014:684047. [PMID: 24688419 PMCID: PMC3928856 DOI: 10.1155/2014/684047] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 10/31/2013] [Indexed: 11/18/2022] Open
Abstract
A new polymeric composite based on natural rubber reinforced with hemp has been processed by electron beam irradiation and characterized by several methods. The mechanical characteristics: gel fraction, crosslink density, water uptake, swelling parameters, and FTIR of natural rubber/hemp fiber composites have been investigated as a function of the hemp content and absorbed dose. Physical and mechanical properties present a significant improvement as a result of adding hemp fibres in blends. Our experiments showed that the hemp fibers have a reinforcing effect on natural rubber similar to mineral fillers (chalk, carbon black, silica). The crosslinking rates of samples, measured using the Flory-Rehner equation, increase as a result of the amount of hemp in blends and the electron beam irradiation dose increasing. The swelling parameters of samples significantly depend on the amount of hemp in blends, because the latter have hydrophilic characteristics.
Collapse
|
38
|
Manaila E, Craciun G, Stelescu MD, Ighigeanu D, Ficai M. Radiation vulcanization of natural rubber with polyfunctional monomers. Polym Bull (Berl) 2013. [DOI: 10.1007/s00289-013-1045-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
39
|
Prasertkittikul S, Chisti Y, Hansupalak N. Deproteinization of Natural Rubber Using Protease Immobilized on Epichlorohydrin Cross-linked Chitosan Beads. Ind Eng Chem Res 2013. [DOI: 10.1021/ie400232r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sirawan Prasertkittikul
- Center of Excellence for Petroleum,
Petrochemicals and Advanced Materials, Department of Chemical Engineering,
Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Jatujak, Bangkok 10900, Thailand
| | - Yusuf Chisti
- School of Engineering, PN 456, Massey University, Private Bag 11 222, Palmerston North,
New Zealand
| | - Nanthiya Hansupalak
- Center of Excellence for Petroleum,
Petrochemicals and Advanced Materials, Department of Chemical Engineering,
Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Jatujak, Bangkok 10900, Thailand
| |
Collapse
|
40
|
Imai S, Yoshida R, Endo Y, Fukunaga Y, Yamazoe A, Kasai D, Masai E, Fukuda M. Rhizobacter gummiphilus sp. nov., a rubber-degrading bacterium isolated from the soil of a botanical garden in Japan. J GEN APPL MICROBIOL 2013; 59:199-205. [DOI: 10.2323/jgam.59.199] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|