Article
Materials Science, Characterization & Testing
Thanuj M. Kumar, Sanga S. G. Shetty, Ekwipoo Kalkornsurapranee, Ladawan Songtipya, Yeampon Nakaramontri, Jobish Johns
Summary: Chemically modified natural rubber can enhance stability, and adding silk fabric can significantly improve the physical properties of the composite material.
POLYMERS & POLYMER COMPOSITES
(2021)
Article
Materials Science, Multidisciplinary
Rawiporn Promsung, Yeampon Nakaramontri, Claudia Kummerloewe, Jobish Johns, Norbert Vennemann, Nitinart Saetung, Ekwipoo Kalkornsurapranee
Summary: In this study, natural rubber was grafted with various acrylic monomers to enhance its mechanical and thermal properties, with improved mechanical properties and crosslinking observed in the grafted rubber vulcanizates. The newly developed curing technique allows for easier processing at low temperatures.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Polymer Science
Di Cao, Yukai Lv, Qian Zhou, Yulong Chen, Xin Qian
Summary: Hydrogel-based strain sensors with interpenetrating network (IPN) structure, incorporating borate and hydrogen bonds, exhibit excellent tensile properties and self-healing capabilities.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Agricultural Engineering
K. S. Krishna Kumar, S. J. Varuni, Rawiporn Promsung, Ekwipoo Kalkornsurapranee, Yeampon Nakaramontri, Jobish Johns
Summary: This study focused on blending soap nut fruit extract with natural rubber as a natural additive, resulting in improved tensile and thermal properties as well as enhanced miscibility between the blend components. The addition of soap nut extract enhanced solvent transport properties and exhibited antibacterial effects. The blend with 5% soap nut extract showed superior properties compared to other blend components.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Materials Science, Multidisciplinary
Zhiying Ren, Chengwei Li, Xiaoyuan Zheng, Tao Zhou, Hongbai Bai
Summary: In this study, a new type of interpenetrating metal entangled structure/silicone rubber composite (MES-SRC) is developed. Through dynamic mechanical tests and analysis, it is found that MES-SRC has higher bearing capacity and damping energy dissipation.
JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Materials Science, Composites
Chuanhui Xu, Wenchao Wu, Zhongjie Zheng, Jiada Nie, Yukun Chen
Summary: A high-performance flexible conductive material was developed using cheap CMCS and XSBR, with added ZnO to create a Zn2+-COBS network for improved conductivity. The material exhibited superior tensile strength and adjustable volume resistance, showing better conductivity performance at higher water content, making it suitable for humidity detectors or solvent environments.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Polymer Science
Jinfeng Tian, Liwei Yan, Hao Zhang, Yuan Wang, Yuanbo Cai, Yisen Huang, Zhaohui Lu, Shuang Xia, Yang Chen, Zhengguang Heng, Huawei Zou, Mei Liang
Summary: In order to achieve uniform distribution of heteroatoms in silicone rubber and improve flexibility and ablation resistance, polydimethylsiloxane with an interpenetrating zirconium-containing double-network (Zr-PDMS) was prepared. Zr-PDMS showed significantly enhanced flexibility with increased tensile strength and elongation-at-break. It also exhibited excellent anti-ablation performance with decreased mass ablation rate and charring rate, forming stable and coherent charred layers after ablation tests.
Article
Chemistry, Multidisciplinary
Huan-Jung Wang, Yi-Zuo Chu, Chen-Kang Chen, Yi-Shun Liao, Mei-Yu Yeh
Summary: This study developed a novel conductive self-healing hydrogel through an interpenetrating polymer network strategy, showing reversible self-healing in both mechanical and electrical properties. The self-healing mechanism was determined using H-1 NMR and FT-IR spectroscopy, demonstrating the cooperative effect of dynamic covalent and noncovalent interactions for its self-healing capability. The hydrogel's macroscopic and microscopic properties were examined through rheology, scanning electron microscopy, and light-emitting diode circuits, showing potential for applications in soft and conformable electronics.
Article
Engineering, Chemical
Andreia S. L. Gouveia, Edwin Bumenn, Katlin Rohtlaid, Alexandre Michaud, Tiago M. Vieira, Vitor D. Alves, Liliana C. Tome, Cedric Plesse, Isabel M. Marrucho
Summary: This work explores the preparation of ionic liquid (IL)-based semi-interpenetrating polymer network (sIPN) membranes composed of poly(ethylene oxide) (PEO) network and linear nitrile butadiene rubber (NBR). The incorporation of different ILs improved the thermal stability of the membranes and affected mechanical properties while maintaining high elongation properties, ultimately enhancing CO2/N-2 and CO2/H-2 separation performances.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Textiles
Thanuj M. Kumar, S. G. Sangashetty, Ekwipoo Kalkornsurapranee, Ladawan Songtipya, Yeampon Nakaramontri, Jobish Johns
Summary: This study prepared composites of cotton fabric reinforced cured natural rubber as matrix material using glutaraldehyde as a curing agent. The cured composites showed excellent mechanical, thermal, physical, and solvent resistance properties, and the addition of cotton fabric significantly enhanced the stability and tensile strength of the natural rubber matrix.
FIBERS AND POLYMERS
(2022)
Article
Polymer Science
Fuyuan Ding, Wei Tang, Lin Fu, Roujia Zhang, Guangnan Wang, Zhiying Han, Ruike Wu, Yifan Dong, Xiaobo Zou
Summary: In this study, IPN hydrogels with high flexibility and conductivity were prepared by modifying agar, oxidized alginate, and polyacrylamide. The presence of potassium and sodium ions in the modified agar and alginate chains endowed the hydrogels with conductive properties. These hydrogels exhibited strain-sensitive properties and can be used for detecting human motion. Furthermore, they maintained their flexibility and conductivity even after storing for six months.
Article
Chemistry, Physical
Osman Konuray, Arnau Sola, Jordi Bonada, Agnieszka Tercjak, Albert Fabregat-Sanjuan, Xavier Fernandez-Francos, Xavier Ramis
Summary: Versatile acrylate-epoxy hybrid formulations are widely used in 3D printing applications, with added coupling agents to mitigate phase separation. These hybrid materials show significant improvement in Young's modulus, and can be easily molded into complex shapes for easy shape recovery under mild temperatures after thermal curing.
Article
Chemistry, Physical
Seo Won Song, Hongdeok Kim, Seoyoon Shin, Seongjin Jang, Jong Hyuk Bae, Changhyun Pang, Joonmyung Choi, Ki Ro Yoon
Summary: Flexible zinc-air batteries with gel polymer electrolyte (GPE) are considered promising for next-generation wearable devices due to their high energy density, low cost, safety, and environmental friendliness. However, the evaporation of liquid component in GPE significantly reduces battery performance and lifespan. To address this issue, a hierarchically porous PVA/PAA hybrid GPE is developed, which improves electrolyte uptake and retention properties, and enhances ionic conductivity. The hybrid GPE demonstrated excellent cycling stability, rate characteristics, and power output in zinc-air batteries, showing their feasibility for powering wearable smart watches.
ENERGY STORAGE MATERIALS
(2023)
Article
Polymer Science
Gregory N. Smith, Erik Brok, Martin Schmiele, Kell Mortensen, Wim G. Bouwman, Chris P. Duif, Tue Hassenkam, Martin Alm, Peter Thomsen, Lise Arleth
Summary: This study aims to determine the precise distribution of hydrophilic polymers introduced into silicone medical devices and utilizes neutron scattering and microscopy techniques for investigation. The structures on the surface of these materials were found to be on the scale of 10-100 nm using atomic force microscopy and spin-echo small-angle neutron scattering.
Article
Chemistry, Analytical
Ji-Sook Lim, Ye-Ji Kim, Soo-Young Park
Summary: The CLCsolid balls exhibit excellent elastic properties suitable for small strain sensors, while the CLCsolid-IPN balls show pH-responsive color change, which can be applied for small pH sensors. Immobilizing urease on the CLCsolid-IPN balls enables their use as small urea sensors. The CLCsolid-IPN-KOH balls, when swollen, can be used to detect divalent metal ions, making these photonic balls a potential new sensor platform with simple functionalization and minimal sample requirements.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Textiles
Madhavi Sridhar, Raju Nama Vasudeva Setty, Jobish Johns
Summary: The study focuses on the electrical properties of blends from Polypropylene (PP) and bamboo fiber, aiming to achieve high dielectric constant and low loss in polymer composites for embedded capacitor applications. Special attention is paid to the influence of coupling agent on the dielectric properties of the resulting composites.(AdapterView) Polypropylene is chosen as the host matrix due to its higher mechanical strength and ease of processing at low temperatures.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Textiles
Thanuj M. Kumar, S. G. Sangashetty, Ekwipoo Kalkornsurapranee, Ladawan Songtipya, Yeampon Nakaramontri, Jobish Johns
Summary: This study prepared composites of cotton fabric reinforced cured natural rubber as matrix material using glutaraldehyde as a curing agent. The cured composites showed excellent mechanical, thermal, physical, and solvent resistance properties, and the addition of cotton fabric significantly enhanced the stability and tensile strength of the natural rubber matrix.
FIBERS AND POLYMERS
(2022)
Article
Materials Science, Textiles
Mahesh Doddashamachar, Raju Nama Vasudeva Setty, Maraluru Venkataravanappa Hemantha Reddy, Jobish Johns
Summary: The effect of using MAPP as a coupling agent on the dielectric properties of polypropylene filled banana fiber composites was examined in this study. The composites prepared with a coupling agent and increased banana fiber content showed significant changes in their dielectric properties, with an increase in dielectric constant by 15-20% compared to uncoupled composites. Scanning electron microscopy analysis revealed that the integration of MAPP improved the adhesion between banana fiber and polypropylene.
FIBERS AND POLYMERS
(2022)
Article
Polymer Science
Nussana Lehman, Akarapong Tuljittraporn, Ladawan Songtipya, Nattapon Uthaipan, Karnda Sengloyluan, Jobish Johns, Yeampon Nakaramontri, Ekwipoo Kalkornsurapranee
Summary: Natural rubber from different Hevea braziliensis clones exhibit unique properties, and the influences of different latex and cream concentrated latex on non-rubber components related properties vary. Among them, the natural rubber latex from RRIM600 clone shows better properties.
Article
Agricultural Engineering
Apinya Krainoi, Boripat Sripornsawat, Pornsiri Toh-ae, Wasuthon Kitisavetjit, Pitchapa Pittayavinai, Weerachart Tangchirapat, Ekwipoo Kalkornsurapranee, Jobish Johns, Yeampon Nakaramontri
Summary: This study investigates the use of fly ashes as reinforcing fillers in natural rubber composites, comparing them with high and low calcium oxides and carbon black. The results indicate that the addition of high calcium oxide significantly reduces vulcanization time, while low calcium oxide provides higher reinforcement efficiency. Furthermore, fly ashes can replace carbon black and exhibit similar elasticity in certain composites.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Textiles
Madhushri Attihalli Venkatachalaiah, Raju Nama Vasudeva Setty, Jobish Johns
Summary: This study investigates the influence of a compatibilizing agent and filler concentration on the mechanical properties of areca fiber reinforced polypropylene composites. The addition of a compatibilizing agent results in improved tensile, flexural strength, and modulus at high fiber loading levels. Microscopic analysis confirms the effective coupling/interfacial adhesion between the fiber surface and polypropylene phase. Higher fiber content leads to increased brittleness and stiffness, while the addition of the compatibilizing agent enhances strength and reduces water absorption.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Polymer Science
Adisak Keereerak, Nusara Sukkhata, Nussana Lehman, Yeampon Nakaramontri, Karnda Sengloyluan, Jobish Johns, Ekwipoo Kalkornsurapranee
Summary: A novel composite based on rubber and modified bentonite clay was investigated. It was found that sonication of bentonite clay in ethanol solution improved its dispersion and mechanical properties. Particularly, the bentonite clay showed superior intercalation effect in the ENR50 composite.
Article
Polymer Science
Boripat Sripornsawat, Antonia Georgopoulou, Sarttrawut Tulaphol, Anoma Thitithammawong, Jobish Johns, Yeampon Nakaramontri, Frank Clemens
Summary: This research develops strain sensors based on conductive natural rubber composites filled with carbon nanotubes and conductive carbon black, and achieves an ionic pathway for electron moving through a modified deep eutectic solvent. The use of the solvent improves the electrical signal sensation of the conductive rubber composite and eliminates inconsistent behavior under different loadings.
EXPRESS POLYMER LETTERS
(2023)
Article
Physics, Condensed Matter
V. Sanjay, K. M. Rajashekara, Jobish Johns, Vinayak Pattar
Summary: Poly vinyl alcohol (PVA) thin-film composites with carbon nanoparticles were prepared using the solution casting technique. Spectroscopic techniques analyzed the carbon distribution in the films, and scanning electron microscopy examined the surface morphology. X-ray diffraction, Fourier transform infrared radiation - attenuated total reflection, and ultraviolet-visible spectroscopy were used to study the crystalline properties, functional group formation, and direct band gap variations in the PVA and PVA-C composites. IV characteristics showed non-Ohmic behavior and changes in conductivity. Impedance, dielectric properties, and electric modulus were evaluated. PVA had an impedance value of 700 ohms, while 0.4%C + PVA had an impedance of 4.6 megaohms. The tangent loss of 0.4%C + PVA decreased by 67% +/- 2. The flexible and lightweight PVA-C exhibited enhanced dielectric performance, making it suitable for microwave electronics.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Construction & Building Technology
Pitchapa Pittayavinai, Weerachart Tangchirapat, Jobish Johns, Yeampon Nakaramontri
Summary: Concrete canvas (CC) is a composite material combining textile and cement, used for slope protection and ditch lining. The use of natural rubber (NR) as a binder in cement-based composites has been explored, resulting in flexible canvas composites with controlled thickness and complex shapes. The incorporation of fly ash (FA) and cement (CM) in NR composites improves their tensile properties, dynamic properties, thermal stability, and flexibility.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Textiles
Bhavyashri Shetty, S. R. Yashodha, Jobish Johns
Summary: This paper presents the use of a cost-effective, eco-friendly, and highly efficient adsorbent for the removal of dye from water. The study focuses on the potential of chitosan/cellulose blend to remove malachite green (MG) from aqueous solution. Results show that maximum adsorption occurs within 30 minutes of the experiment and the adsorption isotherm fits the Langmuir and Freundlich equations. The chitosan/cellulose blend is found to be a cost-effective choice for removing MG.
FIBERS AND POLYMERS
(2023)
Article
Materials Science, Multidisciplinary
Bote Vaishali Raosaheb, Sudhakara Aralihalli, Ekwipoo Kalkornsurapranee, Akarapong Tuljittraporn, Arthittaya Chuaybamrung, K. S. Krishna Kumar, Jobish Johns
Summary: The aim of this study was to develop a nanocomposite by incorporating carbon black nanoparticles into vulcanized natural rubber to improve its physical properties. The vulcanization of natural rubber was achieved through the addition of 2, 4 dihydroxybenzaldehyde. Composite materials were developed using the latex blending method, and the amount of carbon black nanoparticles was varied. Fourier transform infrared spectroscopic analysis confirmed the cross-linking of the rubber phase. The thermal stability and tensile properties of the composites improved with the incorporation of carbon nanoparticles, reaching a maximum at 1.2% carbon black.
EMERGENT MATERIALS
(2023)
Article
Polymer Science
Pornsiri Toh-ae, Prachid Saramolee, Siriluk Chiarakorn, Dujduan Waraho-Zhmayev, Attapol Kamthong, Raymond Lee Nip, Ekwipoo Kalkornsurapranee, Jobish Johns, Patcharapit Promoppatum, Yeampon Nakaramontri
Summary: Natural rubber composite foam with better volatile solvent absorption and antibacterial activity was developed through the Dunlop process. The composite foam with TiO2-ZnO exhibited effective benzene absorbing and removing abilities, and showed superior elastic properties. Additionally, NR/TiO2-ZnO and NR/TiO2-Ag-Zr foams exhibited excellent antibacterial activity for E. coli.
EXPRESS POLYMER LETTERS
(2022)
Article
Polymer Science
Rawiporn Promsung, Yeampon Nakaramontri, Claudia Kummerloewe, Jobish Johns, Norbert Vennemann, Ekwipoo Kalkornsurapranee
Summary: A new simple system for vulcanizing natural rubber latex at low temperature using different bifunctional aldehydes has been proposed. The study investigated the mechanical, thermal, and optical properties of the crosslinked rubber. The results showed that glutaraldehyde-cured rubber exhibited superior mechanical properties and phthaldialdehyde-cured rubber had higher transparency, making it suitable for developing sensor materials.
EXPRESS POLYMER LETTERS
(2022)
Article
Multidisciplinary Sciences
Karn Sourprae, Ekwipoo Kalkornsurapranee, Nussana Lehman, Arthittaya Chuaybamrung, Akarapong Tuljittraporn, Yeampon Nakaramontri, Apinya Krainoi, Jobish Johns, Ladawan Songtipya, Nattapon Uthaipan
Summary: In-house leather-like material based on filled natural rubber (NR) with SiO2 filler exhibited the best abrasion resistance and elasticity compared to commercial leather. Therefore, it is proposed to use NR/SiO2-based leather as a commercial artificial leather.
JOURNAL OF PHYSICAL SCIENCE
(2022)
