Article
Polymer Science
Abdul Shakoor Shar, Ningning Wang, Tianyu Chen, Xiaoying Zhao, Yunxuan Weng
Summary: This study investigates the use of lignin and low-viscosity epoxy resins as modifiers for poly (lactic acid) (PLA) to improve its thermal, mechanical, and barrier properties. The addition of lignin resulted in an increase in PLA's degradation temperature, crystallinity, tensile strength, and oxygen barrier. The epoxy resins acted as compatibilizers and plasticizers, reducing the glass transition, crystallization, and melting temperatures of the PLA/lignin composites and improving their oxygen barrier properties. These modified PLA/lignin composites show potential for green packaging applications.
Article
Forestry
Hangchuan Cai, Zhiqi Wang, Di Xie, Panpan Zhao, Jianping Sun, Daoyu Qin, Fangchao Cheng
Summary: Transparent wood was prepared by alkaline pretreatment, bleaching treatment, and impregnation of epoxy resin, resulting in a flexible material with high transparency and outstanding mechanical properties. The research found that the delignification degree and the ratio of epoxy resin addition significantly influenced the optical and mechanical properties of the flexible transparent wood, with an optimal sample achieving high transmittance, ultra-high haze value, excellent flexibility, and mechanical strength. This study broadens the potential applications of transparent wood in flexible wearable devices and materials.
JOURNAL OF FORESTRY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Pawika Towongphaichayonte, Rangrong Yoksan
Summary: This study successfully fabricated polyelectrolyte complexes from mPEG-g-CTS and ALG, which could form fibrous network macrogels or spherical nanoparticles with different physicochemical properties depending on the mPEG chain length and weight ratios. These complexes have potential applications as carriers for functional food additives, drugs, and bioactive compounds.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Environmental Sciences
Do-Hyun Kim, Jong-Hyeon Han, Hyuk-Cheol Kwon, Su-Jin Lim, Seo-Gu Han, Hyun-Su Jung, Keyong-Ho Lee, Ju-Hee Kang, Sung-Gu Han
Summary: The study found that PEGDE caused subcutaneous toxicity at concentrations above 10,000 μg/mouse, leading to ulceration, but did not affect other organs.
Article
Engineering, Environmental
Thiago Lopes da Silva, Meuris Gurgel Carlos da Silva, Melissa Gurgel Adeodato Vieira
Summary: This study evaluated the use of particles produced from waste sericin and alginate blend for Pd adsorption, showing high removal rates and better fitting with pseudo-second order rate law. External mass transfer resistance was identified as the limiting step of adsorption, and both chemisorption and physisorption were involved in metal uptake. The adsorbent demonstrated feasibility for Pd removal and recovery with maximum adsorbed capacities at different temperatures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Polymer Science
Naofumi Naga, Daisuke Inose, Tomomi Ishida, Kyohei Kubota, Hassan Nageh, Tamaki Nakano
Summary: Polymer networks were synthesized by addition reactions of tri-functional amine, TAEA or PPGTA, and PEGDA or PEGDE in DMSO as a solvent. Increasing monomer concentration increased Young's modulus and breaking stress of the gels. Gels with PPGTA showed flexible features compared to those with TAEA, and high molecular weight gels displayed lower Young's modulus and higher breaking strain.
Article
Polymer Science
Corina Logigan, Christelle Delaite, Crina-Elena Tiron, Cristian Peptu, Marcel Popa, Catalina Anisoara Peptu
Summary: Chitosan hydrogels were prepared by chemical modification and double crosslinking in a water/oil emulsion. The modified chitosan showed better control of dimensional properties and morphology compared to neat chitosan. In addition, the modified hydrogels exhibited pH-dependent behavior and demonstrated excellent capacity for drug loading and release, making them suitable for controlled release applications in biomedicine.
Article
Environmental Sciences
Pratibha Yadav, Anshul Yadav, Pawan Kumar Labhasetwar
Summary: In this study, recyclable Fe3O4-functionalized MIL101(Fe) chitosan composite beads were synthesized for efficient removal of tetracycline, doxycycline, and ciprofloxacin antibiotics from water. The beads showed high removal efficiency (>99%) for all antibiotics under optimum conditions, and demonstrated excellent regeneration ability for up to 5 cycles. The adsorption mechanism involved pi-pi interaction, H-bonding, and electrostatic interaction between the antibiotics and the adsorbent. The results highlight the potential of these beads for antibiotic removal from pharmaceutical industry wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Iolanda Fustes-Damoc, Teodor Malutan, Alice Mija
Summary: In this study, chitosan, an abundant biopolymer, was combined with a biobased monoaromatic diepoxide to develop sustainable and fully biobased materials. The obtained thermoset resins showed high reactivity, appropriate polymerization temperatures, and the presence of a polyfunctional crosslinker. The resulting resins had high crosslinking densities and storage moduli.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Edward Hermosilla, Marcela Diaz, Joelis Vera, Maria Jose Contreras, Karla Leal, Rodrigo Salazar, Leticia Barrientos, Gonzalo Tortella, Olga Rubilar
Summary: In this study, chitosan was used to encapsulate the mycelia of the white-rot fungus and form chitosan fungal beads for multiple extractions and nanoparticle synthesis. The resulting nanoparticles were composed of chitosan-silver nanoparticles with a size of 25 nm. The chitosan fungal beads lost their ability to produce chitosan-silver nanoparticles after three extractions and nanoparticle synthesis.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Chemical
Xuewen Chen, Dan Zhao, Yanmao Dong, Yanhui Zhou, Yan Yuan
Summary: Fe-graphene hydrogels were prepared through a facile hydrothermal process, with different additives optimizing their structure and enhancing PFOA removal efficiency. Among the samples, FC4 showed the best removal efficiency for PFOA and exhibited superior adsorption capacity.
DESALINATION AND WATER TREATMENT
(2021)
Article
Engineering, Environmental
Mohammadtaghi Vakili, Fatemeh Gholami, Haider M. Zwain, Wei Wang, Amin Mojiri, Martin Tomas, Giovanni Cagnetta, Reza Gholizadeh, Wafa Dastyar, Zahra Gholami
Summary: This study achieved effective adsorption of GenX by using chitosan (CS) modified adsorbent. The prepared CS-DEO-APTES adsorbent showed high adsorption capacity and excellent stability. Kinetic and isothermal data revealed chemisorptive interactions between GenX and CS-DEO-APTES with a uniform distribution of adsorption sites. GenX-saturated beads were successfully regenerated multiple times. Density functional theory calculations indicated that electrostatic interactions primarily influenced the adsorption of GenX. These results highlight the effectiveness of the CS-DEO-APTES adsorbent for removing GenX from aqueous solutions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Joanna Kluczka, Gabriela Dudek, Wojciech Pudlo, Alicja Kazek-Kesik, Roman Turczyn
Summary: Hybrid biosorbent hydrogel beads based on chitosan and manganese were used to effectively remove boron from aqueous media, achieving a maximum sorption capacity of 190 mg/g. The method shows promise in improving water quality and reducing pollution in aquatic environments.
Article
Biochemistry & Molecular Biology
Yangyang Zhao, Yang Song, Rui Li, Fengfan Lu, Yibin Yang, Qiongjian Huang, Dongli Deng, Mingzhu Wu, Ying Li
Summary: In order to overcome the weak affinity and difficult separation of biochar, chitosan-biochar hydrogel beads (CBHBs) were developed as a solution for removing reactive brilliant blue (RBB KN-R) from wastewater. The adsorption behavior and mechanism of RBB KN-R onto CBHBs were extensively studied. The adsorption capacity showed pH-dependence and the highest adsorption capacity was observed at pH 2. The adsorption process followed the pseudo-second-order kinetic model and the intraparticle diffusion model. Film diffusion and intraparticle diffusion both contributed to the adsorption process. The maximum adsorption capacity was found to be 140.74 mg/g at 298.15 K, and higher temperatures favored the adsorption process. A complex mechanism involving p-p interactions, electrostatic attraction, hydrophobic interaction, and hydrogen bonding was found to contribute to the overall adsorption process. The presence of coexisting substances and elevated ionic strength hindered the adsorption capacity. After three cycles of adsorption-desorption, the CBHBs maintained an adsorption capacity above 95% for RBB KN-R. These results suggest that CBHBs are a durable and cost-effective adsorbent for efficient removal of dyes from wastewater.
Article
Chemistry, Physical
Shymaa S. Medany, Mahmoud A. Hefnawy
Summary: A modified NiCo2O4 composite electrocatalyst is prepared with chitosan matrix to enhance the electrooxidation of ethylene glycol. The synergistic effect between spinel oxide and chitosan is evaluated through a comparative study with pristine NiCo2O4. The electrochemical activity towards ethylene glycol electrooxidation is investigated in an alkaline solution, and the long-term stability of the composite electrode is measured. Kinetic parameters and adsorption energies are calculated, and the interaction between spinel oxide and chitosan is studied using a Forcite model.
SURFACES AND INTERFACES
(2023)
Article
Polymer Science
Edgar O. Perez-Gomez, Guillermo J. Cruz, Genoveva Garcia-Rosales, Karla Serafin-Diaz, Ma del Rosario Mejia, Maribel Gonzalez-Torres, Laura Alvarez-Mejia, Ma Guadalupe Olayo
Article
Engineering, Environmental
E. O. Perez-Gomez, G. Garcia-Rosales, L. C. Longoria-Gandara, J. C. Gomez-Vilchis
Summary: This study utilized Citrus tangerina peel to produce biochar with calcium nanoparticles for the removal of Aflatoxin B1 in water. The optimal pyrolysis time for obtaining biochar with the best surface properties and adsorption capacity was found to be 180 minutes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
J. C. Gomez-Vilchis, G. Garcia-Rosales, L. C. Longoria-Gandara, E. O. Perez-Gomez, D. T. Castilleros
Summary: This research presents the production and characterization of biochar derived from pomegranate peel conditioned with iron and cerium nanoparticles, as well as its capability to adsorb ampicillin in aqueous phase. The experimental results show that the biochar has a high adsorption capacity for ampicillin and can be reused multiple times.