Article
Polymer Science
Ting-Ting Li, Xiao Zhang, Zhike Wang, Hai-Tao Ren, Hao-Kai Peng, Bing-Chiuan Shiu, Ching-Wen Lou, Jia-Horng Lin
Summary: This study investigated the effect of adding melamine and bentonite on PU foam, resulting in a porous composite material with excellent heavy metal adsorption properties. The research demonstrated the impact of different additive amounts on the structure and performance of porous foam, as well as explored the optimal adsorption conditions.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2021)
Article
Engineering, Environmental
Longfang Ren, Zheng Tang, Jinyao Du, Lu Chen, Taotao Qiang
Summary: The novel composite foam CMCTS-PUF-s showed excellent adsorption efficiency for methylene blue, with a high adsorption capacity of 118.2 mg/g and a removal rate of 97.1%. Even after recycling five times, it still maintained a removal rate of 83.2%, demonstrating its excellent reusability. Additionally, the CMCTS-PUF-s exhibited increased elasticity and tensile strength compared to PUF, making it a promising candidate for future treatment of dye wastewater.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Xiaobo Huang, Chongpeng Qiu, Yuanlong Chen, Xuefeng Zhang, Jinqiu Qi, Yongze Jiang, Cornelis F. de Hoop, Xingyan Huang
Summary: Dye-contaminated water is a global pollution problem that threatens aquatic organisms and human health. In this study, a bioinspired pressure-driven foam adsorbent (PFA) was developed from nanocellulose (NC), amino-functionalized ZIF-8 (ZIF-8-NH2), and high resilience polyurethane foam (PUF) to purify the dye-contaminated water. The PFA showed efficient removal of methyl orange (MO) and crystal violet (CV) dyes from dye-contaminated waste solutions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Xin Wei, Dong Chen, Li Wang, Yuhong Ma, Wantai Yang
Summary: The study involved the design and synthesis of a modified polyurethane foam material that serves as an effective dye adsorbent with significant pH-sensitive properties. Experimental results demonstrated the material's good regenerability and high removal efficiency in dye treatment.
APPLIED SURFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Rais Ahmad, Khalid Ansari
Summary: This paper synthesized an eco-friendly and low-cost chitosan modified hybrid Azadirachta indica leaves powder-Kaolinite clay nanocomposite and investigated its potential as an adsorbent for removing hazardous dyes from aqueous solution. The results showed that the nanocomposite had good adsorption capacity for Congo red and Methylene blue dyes, with the ability to be successfully regenerated multiple times. The study also found that the adsorption process followed pseudo second order kinetics and had thermodynamic parameters indicating spontaneous and endothermic nature.
PROCESS BIOCHEMISTRY
(2021)
Article
Materials Science, Composites
Ting-Ting Li, Shuxia Li, Xiao Zhang, Bing-Chiuan Shiu, Hao-Kai Peng, Hai-Tao Ren, Chun-Hui Miao, Ching-Wen Lou, Jia-Horng Lin
Summary: This paper investigates the preparation of high-impact polyurethane composite material with excellent mechanical strength and good adsorbability by compounding different size of polyester and nylon nonwovens with melamine-bentonite composite PU foam. The mechanical properties and cellular structure of PU foam are influenced by the composition of the two different fabrics. The addition of fabric improves the mechanical property of composites and enhances the adsorption of Pb2+ effectively.
POLYMER COMPOSITES
(2021)
Article
Chemistry, Multidisciplinary
Rahmi, Muhammad Iqhrammullah, Ulfa Audina, Husni Husin, Haya Fathana
Summary: A film adsorbent OC/Chi-EDTA was prepared from OPEFB-based charcoal through a simple phase inversion technique, showing advantageous properties for Cd (II) adsorptive removal. The material exhibited high tensile strength, adsorption capacity, and thermal stability, with successful adsorption mechanisms of electrostatic attraction and complexation for Cd (II) uptake.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2021)
Article
Biochemistry & Molecular Biology
Xiaoxiao Wan, Zhihao Rong, Kaixuan Zhu, Yumin Wu
Summary: In this study, a dual-network, composite hydrogel adsorbent was prepared by introducing chitosan cross-linked polyvinylamine into the N,N '-methylenebisacrylamide cross-linked polyacrylic acid network. The hydrogel exhibited excellent mechanical properties, good reusability, and large adsorption capacity, making it highly efficient for the removal of methylene blue dye from textile industry wastewater.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Biochemistry & Molecular Biology
Raziyeh Karkhani, Vahid Javanbakht
Summary: A novel bio-based polyurethane foam was synthesized and modified with chitosan/carboxymethyl cellulose gel and ZSM-5 nano zeolite, which enhanced its adsorption capacity and selectivity towards dyes.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Mechanics
Wenfei Ji, Qicheng Zhang, Fernando Alvarez-Borges, Guanjie Yuan, Jeroen Van Duijneveldt, Wuge H. Briscoe, Fabrizio Scarpa
Summary: Flexible polyurethane foam composites with enhanced stiffness and energy dissipation were synthesized by layer-by-layer assembly of nanoclay/chitosan multilayers onto foam struts. The composite foams exhibited significant improvements in mechanical properties and energy dissipation compared to uncoated pristine foam. The layer-by-layer coated foam showed a higher dynamic modulus and reduced impact force transmission, demonstrating its superior performance in energy dissipation.
COMPOSITE STRUCTURES
(2023)
Article
Biochemistry & Molecular Biology
Neset Erek Sen, Zeynep Mine Senol
Summary: Chitosan-diatomite composite beads (Ch-D) were synthesized and exhibited improved adsorption capacity for Allura red AC (AR) food dye through hydrogen bonding and electrostatic interactions. The Ch-D composite showed a removal rate of 98% at 25 degrees Celsius, natural pH value, and an initial AR dye concentration of 200 mg L-1. The maximum adsorption capacity was found to be 34.7 mg g-1. The interactions between functional groups on the Ch-D composite and AR dye involved pi-pi interactions, hydrogen bonds, and electrostatic interactions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Chemical
Qingbai Zhao, Yuqin Wan, Fan Chang, Yifan Wang, Hongkun Jiang, Lei Jiang, Xinyue Zhang, Ning Ma
Summary: This paper investigates a black foam material with a polypyrrole layer, which has excellent light absorption capacity on the surface. The material, combined with its porous structure and low thermal conductivity, can rapidly increase surface temperature and be continuously used for desalination and water purification. Experimental results demonstrate that this material has a high evaporation efficiency under high illumination conditions.
Article
Biochemistry & Molecular Biology
Assia Benhouria, H. Zaghouane-Boudiaf, Riadh Bourzami, Ferhat Djerboua, B. H. Hameed, Mokhtar Boutahala
Summary: Chitosan/bentonite beads (CsB) composites were prepared for the removal of reactive orange 16 (RO16) and methylene blue (MB). The adsorption results showed that Cs20B80 was the best adsorbent for MB and RO16 dyes. The characteristics of Cs, B, and Cs20B80 were investigated using various techniques. The adsorption process was affected by contact time, initial concentration, temperature, adsorbent quantity, ion strength, and solution pH.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
S. Jayakumar, S. Sudarsan, B. Sridhar, E. Parthiban, A. V. Prabhu, Sudan Jha
Summary: The adsorption of Cr6+ and Pb2+ ions in contaminated solution using a ternary blend made up of Chitosan, Nylon 6, and Polyurethane foam (CS/Ny 6/PUF) with a ratio of 2:1:1 was investigated. The blends were used as adsorbents due to their insolubility in acidic and basic mediums. The maximum adsorption of metal ions was achieved at pH 5 and followed the Freundlich model. The adsorption kinetics showed a pseudo-second-order reaction for chromium and a pseudo-first-order reaction for lead.
Article
Biochemistry & Molecular Biology
Wenyuan Ma, Xiangyu Liu, Hang Lu, Qingdong He, Ke Ding, Xuehan Wang, Wenbo Wang, Fang Guo
Summary: A novel hydrogel adsorbent was developed by incorporating natural rectorite (REC) into a chitosan-g-poly (2-acrylamido-2-methyl-propane-sulfonicacid) hydrogel network, which exhibited enhanced adsorption capacities and removal rates for methylene blue (MB) compared to commercial activated carbons. The adsorbent showed high adsorption efficiency in a broad pH range (2-11) and could be reused for >4 times.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Young Seung Kwon, Ji-Su Lee, Gyu-Hyun Hwang, Young Gyu Jeong
Summary: This study reports the microstructure, electrical and electrochemical properties of MXene/PEA-derived hybrid carbon nanofibers (HCNFs) as high-performance supercapacitor electrode materials. The results show that MXene nanosheets are uniformly deposited on PEA-derived CNFs and that they contribute to the increase in electrical conductivity and electrochemical performance of the HCNFs.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Composites
Soo-Yeon Kim, Ha-Eun Gang, Gyu-Tae Park, Ha-Bin Jeon, Hyun Bin Kim, Seung-Hwan Oh, Young Gyu Jeong
Summary: In this study, polyamide 6 (PA)-based composites with polyurethane-coated carbon fiber (CF) as reinforcement filler and electron beam (EB) irradiation as efficient crosslinking process were investigated. The results show that increasing CF content and EB dose can significantly enhance the thermal stability and dynamic mechanical properties of the PA/CF composites.
POLYMER COMPOSITES
(2022)
Article
Engineering, Chemical
Eun-Ji Choi, So-Jeong Lee, Ha-Eun Gang, Young Gyu Jeong
Summary: Reactive compatibilization using titanium butoxide (TBT) was found to be the most effective method for improving the morphology and physical properties of TLCP/PCT blends. FT-IR spectroscopic analysis confirmed copolyester formation through catalyst-induced transesterification. Despite the decrease in crystallization transition temperatures, the residue at 800 degrees C increased for blends with higher TBT loadings, indicating improved thermal stability. The shear moduli and complex viscosity of compatibilized TLCP/LCP blends were higher than neat TLCP and PCT, showing enhanced mechanical properties after reactive compatibilization.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Materials Science, Composites
Ji-Su Lee, Gyu-Hyun Hwang, Young Seung Kwon, Young Gyu Jeong
Summary: In this study, eco-friendly and multifunctional thermoplastic composites were manufactured by adding different amounts of multi-walled carbon nanotubes (MWCNT), which improved the performance of the composites, such as thermal stability and electrical conductivity, and exhibited good electromagnetic wave shielding effectiveness.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Polymer Science
Feng Tang, Young Gyu Jeong
Summary: We report the effects of modified polyketone (PK) on the microstructure, thermal stability, mechanical modulus, and impact strength of poly(lactic acid) (PLA). In-situ melt-compounding was used to fabricate glycidyl methacrylate-grafted polyketone (PKGMA), which was then melt-mixed with pristine PLA to obtain PLA-dominant blends with varying PKGMA loadings. The blended PLA/PKGMA materials showed a well-compatibilized microstructure, with PKGMA domains dispersed in the PLA matrix phase. The intermolecular interactions and chemical reactions between PLA and PKGMA were confirmed through spectroscopic and rheological analyses. The addition of PKGMA as a nucleating agent enhanced the crystallization of PLA in the blends. Furthermore, the thermal stability, mechanical modulus, and impact strength of PLA were improved with the addition of PKGMA.
Article
Materials Science, Composites
Feng Tang, Young Gyu Jeong
Summary: Interface-engineered polypropylene/cellulose nanofibril (PP/CNF) composites with improved thermal and mechanical performance were successfully obtained through grafting modification and nanofiber reinforcement. Spectroscopic analyses confirmed the presence of specific hydrogen-bonding interactions, and melt-rheological measurement revealed chemical reactions, improving the dispersion and interfacial adhesion of nanofibers in the composite matrix. Additionally, by changing the crystalline form, the storage modulus of the composite was further enhanced, and the impact strength was significantly improved.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Eun-Ji Choi, So-Jeong Lee, Young Gyu Jeong
Summary: We synthesized new thermotropic liquid crystalline polyesters (TLCPs) with different mesogenic cycloaliphatic unit content in the mainchain and investigated their structure-property relationship. The TLCPs were composed of three different repeating units and the effects of the size and content of TPA/CHDM-derived repeating units were compared to HNA-based repeating units. The TLCPs showed thermotropic liquid crystalline features and associated fibrillar structures. The melting temperatures of the TLCPs decreased with increasing TPA/CHDM-based repeating units, while the glass transition temperature increased. The TLCP with 2.5 mol% TPA/CHDM-derived repeating units exhibited the maximum elastic storage modulus.
Article
Polymer Science
Seok-Ju Kim, Tae-Gyeong Eom, Seokchan Kang, Minyoung Seo, Young Gyu Jeong
Summary: In this study, sustainable composites based on modified poly(lactic acid) (PLA) matrix and cellulose nanofibril (CNF) fillers were investigated regarding their microstructure, thermal stability, melt-rheological behavior, and mechanical properties. The results showed successful grafting of glycidyl methacrylate (GMA) onto the PLA backbone and the existence of intermolecular chemical reactions and specific interactions between the GMA group of the PLA-g-GMA matrix and the hydroxyl group of the CNF filler in the composites. The increase in CNF loading resulted in higher glass transition and cold-crystallization temperatures, as well as improved thermal decomposition temperature and residue at 500°C, elastic storage moduli, impact strength, and complex viscosity.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Composites
Tae-Gyeong Eom, Young-Gi Song, Minyoung Seo, Seok-Ju Kim, Jin-Hyeok Park, Gil-Woo Jeon, Young Gyu Jeong
Summary: We analyzed the impact of short aramid fibers (AFs) on the melt-rheological behavior, thermal transition, thermal stability, and mechanical durability of thermotropic liquid crystal polyesters (TLCPs) through a study. The addition of AF fillers to the TLCP matrix composites improved the complex viscosity, shear storage/loss moduli, and thermal transition temperatures. However, the enthalpies increased only at low AF loading contents and decreased at high AF contents due to partial aggregation of AF fillers. The addition of 5 wt% AF to the TLCP significantly improved its elastic moduli and long-term mechanical durability at elevated temperatures.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Tae-Gyeong Eom, Feng Tang, Minyoung Seo, Seok-Ju Kim, Young-Gi Song, Jin-Hyeok Park, Young Gyu Jeong
Summary: In this study, the influences of aramid nanofiber (ANF) on the thermal stability and long-term mechanical performance of thermotropic polyarylate (TPAR) nanocomposites were investigated. It was found that ANFs contributed to enhancing the glass transition temperature and melt-crystallization of TPAR, thereby improving the overall mechanical durability of the nanocomposites.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Composites
Minyoung Seo, Feng Tang, Seok-Ju Kim, Tae-Gyeong Eom, Young-Gi Song, Jin-Hyeok Park, Young Gyu Jeong
Summary: The fabrication, microstructure, thermal property, and piezoelectric performance of flexible waterborne polyurethane (WPU) nanocomposite films reinforced with barium titanate (BT) nanoparticles were investigated. The results showed that the thermal and piezoelectric properties of the nanocomposite films improved with increased nanoparticle content.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Ji-Soo Yun, Seon-Ae Hwangbo, Young-Gyu Jeong
Summary: Liposomes are microspheres that can encapsulate both hydrophilic and hydrophobic substances, making them important mediators in cosmetics and pharmaceuticals. This study developed a focused ultrasound method to produce nano-sized liposomes with better size control. Results showed that the liposomes produced using this method had a uniform size distribution and good stability.
Article
Polymer Science
Jin-Hyeok Park, Seok-Ju Kim, Tae-Gyeong Eom, Minyoung Seo, Young-Gi Song, Feng Tang, Young Gyu Jeong
Summary: This article investigates the impact of reduced graphene oxide (RGO) nanofillers on the properties of unsaturated polyester resin (UPR) and demonstrates that RGO can enhance thermal stability, mechanical modulus, and glass transition-related properties.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Eun-Ji Choi, So-Jeong Lee, Young Gyu Jeong
Summary: This study reports the structure and property characterization of a series of thermotropic liquid crystalline polyesters (TLCPs) composed of different repeating units, and investigates the effect of TDCA/CHDM-based repeating unit on the structure, thermal and mechanical properties of the TLCPs. It is found that the TDCA/CHDM unit affects the glass transition temperature, melting temperature, and crystallinity of the TLCPs, but beyond a certain amount, these properties decrease. Additionally, TLCPs exhibit a crystal lattice transition and remain stable at high temperatures with good elastic moduli.
POLYMER-PLASTICS TECHNOLOGY AND MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Jinho Park, Young Gyu Jeong
Summary: In this study, the thermoelectric and photothermoelectric properties of PBI-based nanocomposite films with different loadings of MWCNT were investigated. The results showed that the Seebeck coefficient and thermoelectric current generation efficiency of the nanocomposite films increased with the increase of MWCNT content. In addition, visible light illumination at the interface between the film and electrode induced excellent photothermoelectric performance.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
