Article
Polymer Science
Xinyu Wang, Chenyu Zhou, Shengsong Dai, Junjie Wang, Zhiquan Pan, Hong Zhou
Summary: A bio-based flame retardant PDE was synthesized and applied in epoxy resin, with further modification of the resin by adding chitosan. The modified resins showed excellent flame retardancy and transparency, as well as absorption effect towards ultraviolet light.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Engineering, Chemical
Lifan Zhang, Jiajia Jiang, Tengkun Ma, Yong Pan, Yanjun Wang, Juncheng Jiang
Summary: This study investigated the thermal degradation behaviors and reaction kinetics of medical waste infusion bag and nasal oxygen cannula under inert atmosphere. Different methods were employed to estimate activation energy and predict reaction mechanisms. The results indicated zero-order reaction mechanism for infusion bag pyrolysis and a combination of zero-order and three-dimensional diffusion for nasal oxygen cannula. By introducing adjustment functions, reconstructed reaction models were proposed and found to fit well with experimental data. These findings provide valuable reference for understanding the degradation behaviors and simulating parameters of these medical waste products.
Article
Engineering, Environmental
Yonglei Wang, Xinglin Wang, Liping Tian, Yanan Li, Guilin He, Haiyang Yu, Hua Qi, Wentao Sun
Summary: This study successfully removed microcystis aeruginosa in lakes and reservoirs by modifying chitosan as amphiphilic material and using it as a bubble modifier. The modified chitosan showed improved water solubility but decreased thermal stability. Butyl-N-2 hydroxypropyl trimethyl chitosan ammonium chloride was the most effective modifier with an algae removal ratio of 93.47% at a dosage of 1.0 mg/L. The presence of algal organic matter enhanced the overall effect of algae removal, and electrostatic attraction was the primary adhesion mechanism.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Liguo Wang, Yu Zhang, Le Guo, Fengjuan Wang, Siyi Ju, Shiyu Sui, Zhiyong Liu, Hongyan Chu, Jinyang Jiang
Summary: Studying the effects of organic admixtures on the hydration and dissolution mechanism of tricalcium silicate (C3S) is important for regulating cement-based materials. Citric-acid-modified chitosan (CAMC) can adsorb calcium ions released from C3S dissolution and inhibit particle dissolution, thereby interfering with the hydration process of cement silicate.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Polymer Science
Ana Carolina Salgado de Oliveira, Taline Amorim Santos, Julio Cesar Ugucioni, Roney Alves da Rocha, Soraia Vilela Borges
Summary: Chitosan and polyaniline were studied for use as conductive and flexible films in this article. By casting with the addition of glycerol and glutaraldehyde, the films were obtained with improved electrical conductivity and chemical structure.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Engineering, Environmental
Magdalena Wegrzyn, Ewa Rudnik, Renata Kamocka-Bronisz, Bozena Kukfisz
Summary: The study focused on the modification of polyethylene-based biocomposites from renewable resources with phosphonium ionic liquids and analyzed their mechanical properties and thermal behavior. It was found that the presence of ionic liquids had a significant impact on the tensile properties and thermal stability of the biocomposites. Additionally, the type of anion in the ionic liquid influenced the thermal behavior of the modified biocomposites.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Chemistry, Physical
Dagmara Bajer, Halina Kaczmarek
Summary: This study investigated the thermal stability and UV radiation resistance of fluorescent biopolymer derivatives. The results show that the dye IBm is more thermally stable than BOx and BTh, but releases the most volatile products. The substitution of dyes for chitosan slightly changes its thermal stability, but the decomposition temperatures of modified CS are similar to the virgin sample. In addition, UV irradiation has a minor impact on the thermal parameters and volatile degradation products of chitosan derivatives.
Article
Chemistry, Physical
Kai Liu, Junfeng Chen, Fengfei Sun, Jingjing Yu, Xinyi Zhang, Yuling Xu, Yanyan Liu, Meizhen Tang, Yuewei Yang
Summary: A new intimately coupling photocatalysis and biodegradation system was reported in this study. The rod-like graphite carbon nitride-molybdenum disulfide (RCM) of S-scheme was prepared and loaded onto the surface of chitosan modified polyurethane sponge (CPU). Rhodopseudomonas palustris (R. palustris) with metabolic versatility and decomposition ability was combined with RCM.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Agricultural Engineering
Manish Choudhary, Sandesh Kumar Jain, Dhananjay Singh, Keerti Srivastava, Anil K. Patel, Jurgen Mahlknecht, Balendu Shekher Giri, Manish Kumar
Summary: The chemical treatment of sun hemp fibers enhances its thermal stability, with an activation energy ranging from 93.3-104.8 kJ/mol and a pre-exponential factor ranging from 46.6 x103-90.5 x106/min.
BIORESOURCE TECHNOLOGY
(2023)
Article
Polymer Science
Patrick Pimenta R. Cruz, Leonardo Cerqueira da Silva, Raildo A. Fiuza-Jr, Humberto Polli
Summary: The thermal degradation of PVC occurs in two stages, with each stage subdivided into two substages. The dehydrochlorination stage, which is poorly understood, involves the formation of HCl as a catalyst. The study focused on the molecular structure and kinetic parameters during this stage, showing that the dehydrochlorination process follows a first order reaction model and involves nucleation and growth.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Anjani K. Maurya, Sumit Mandal, Dean E. Wheeldon, Jean Schoeller, Michel Schmid, Simon Annaheim, Martin Camenzind, Giuseppino Fortunato, Alex Dommann, Antonia Neels, Amin Sadeghpour, Rene M. Rossi
Summary: This study provides a molecular interpretation of the relationship between structural changes in fibers and mechanical properties of fabrics under different heat exposures. Changes in crystallinity and lamellar spacing of fabrics were observed, impacting mechanical properties. Thermal decomposition occurs at temperatures above the degradation point, potentially posing a danger to users.
Article
Environmental Sciences
Guanjie Wang, Zhiping Ye, Shuhan Dong, Jiade Wang
Summary: In this study, the non-hazardous application of low-temperature plasma technology in solid waste from the silicone industry was investigated. The results showed that 92.9% of TOC in the organosilicon waste residue could be removed under specific conditions, with the TOC content decreasing from 166.0 g/kg to 11.8 g/kg. The energy efficiency of the TOC removal rate reached 732.1 gkWh-1, and the temperature of the discharge zone was below 280 degrees C. The organic matter was gasified and decomposed into small molecules such as CH4, H2, CO, and CO2 under the action of plasma and thermal.
Article
Polymer Science
Jing Jiang, Xueyu Yuan, Xi He, Shengjie Guan, Qian Wu, Ming Liu, Li Liu, Yudong Huang
Summary: This study reports a strategy to enhance the thermal resistance of silicone resins by introducing zirconium into the main chain. The molecular simulation shows that the introduction of zirconium atoms leads to the formation of high energy zirconium-oxygen bonds, increasing the cross-linking degree and suppressing the formation of cyclic oligomers. The results suggest that this work could provide a systemic experimental and theoretical foundation for thermal properties enhancement through metal atoms incorporation.
Article
Chemistry, Applied
Lingyuan Chen, Jiali Tang, Suoque Wu, Shixing Wang, Zhaogang Ren
Summary: A pyridine-modified chitosan (PMCS) adsorbent was prepared for the efficient adsorption of Au(III) from wastewater, demonstrating excellent adsorption performance, specific selectivity, and reusability. The adsorption capacity of PMCS for Au(III) was found to be high, and it showed selective adsorption even in the presence of multiple ions.
CARBOHYDRATE POLYMERS
(2022)
Article
Polymer Science
Xulin Yang, Yi Li, Wenwu Lei, Zhongxiang Bai, Yingqing Zhan, Ying Li, Kui Li, Pan Wang, Wei Feng, Qi Liu
Summary: The present study aimed to discover the thermal degradation mechanism of high-temperature-resistant phthalonitrile (PN) foam under an inert gas atmosphere. PN foam was found to involve a three-stage thermal degradation mechanism, with the presence of gas superposition phenomenon due to the trapped decomposition gases in closed cells. This research is of great significance for understanding the thermal degradation behavior of polymer foam and providing guidance for material design.
Article
Chemistry, Physical
Piotr Macczak, Halina Kaczmarek, Marta Ziegler-Borowska, Katarzyna Wegrzynowska-Drzymalska, Aleksandra Burkowska-But
Summary: This study investigates the potential use of starch and chitosan and their oxidized derivatives as eco-friendly flocculants for water treatment. The research found that the oxidized starch and chitosan derivatives can be used as ecological flocculating materials to treat potable water or sludge.
Article
Biochemistry & Molecular Biology
Dorota Chelminiak-Dudkiewicz, Aleksander Smolarkiewicz-Wyczachowski, Katarzyna Wegrzynowska-Drzymalska, Marta Ziegler-Borowska
Summary: Levan, a biocompatible and renewable biopolymer with anticancer properties, has promising applications in various industries. However, the literature lacks information on its behavior under UV irradiation, potentially limiting its use. This study investigates the effects of irradiation on the structural properties of levan, and finds that photodegradation occurs faster and more efficiently with a polychromatic light source compared to an LED lamp.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Katarzyna Wegrzynowska-Drzymalska, Kinga Mylkie, Pawel Nowak, Dariusz T. Mlynarczyk, Dorota Chelminiak-Dudkiewicz, Halina Kaczmarek, Tomasz Goslinski, Marta Ziegler-Borowska
Summary: In this study, dialdehyde starch nanocrystals were used as cross-linking agents to chemically cross-link native chitosan, gelatin, and a mixture of these two biopolymers. The resulting materials exhibited desirable properties for biomedical applications, and their characteristics such as hydrophilicity, swelling ability, and protein absorption were also evaluated.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Pawel Bakun, Beata Czarczynska-Goslinska, Dariusz T. Mlynarczyk, Marika Musielak, Kinga Mylkie, Jolanta Dlugaszewska, Tomasz Koczorowski, Wiktoria M. Suchorska, Marta Ziegler-Borowska, Tomasz Goslinski, Rafal Krakowiak
Summary: This article introduces a method for wound healing and tissue regeneration using titanium(IV) oxide-based nanomaterials. The material was characterized and tested using various methods, and the results showed that the TiO2-GA material has antioxidant properties and can prevent bacterial infections.
Article
Biochemistry & Molecular Biology
Katarzyna Wegrzynowska-Drzymalska, Dariusz T. Mlynarczyk, Dorota Chelminiak-Dudkiewicz, Halina Kaczmarek, Tomasz Goslinski, Marta Ziegler-Borowska
Summary: In this study, thin chitosan-gelatin biofilms cross-linked with dialdehyde cellulose nanocrystals were successfully obtained for dressing materials. The selective oxidation of nanocrystals improved the degree of cross-linking and enhanced the performance of the biofilms, such as roughness parameters and antioxidant activity. DNCL showed better cross-linking effects than DAMC. The cross-linking process also improved oxygen permeability and anti-inflammatory properties. Films cross-linked with DAMC exhibited lower toxicity, making them potentially more suitable for medical dressings.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Inorganic & Nuclear
Magdalena Barwiolek, Dominika Jankowska, Anna Kaczmarek-Kedziera, Tadeusz M. Muzio
Summary: Two compounds were synthesized and their crystal structures were determined by X-ray crystallography. The intermolecular interactions in the crystal structures were analyzed, and the influence of solvents on the crystal lattice was investigated. The fluorescence properties of the compounds in different states and solvents were studied, and their sensing abilities towards Zn2+ ions were evaluated. Thin layers of the compounds were also prepared and examined using various microscopy techniques.
Article
Polymer Science
Malgorzata Sypniewska, Anna Kaczmarek-Kedziera, Alexandra Apostoluk, Vitaliy Smokal, Anastasiia Krupka, Robert Szczesny, Beata Derkowska-Zielinska
Summary: The aim of this study was to investigate the influence of various StQ substituents on the luminescence, structural, and optical properties of StQ-containing copolymers. The study found that the change in the nature of the substituent affects the emission band wavelength and can cause a transition in fluorescence color. FTIR and Raman spectroscopies were used to measure the structural properties, while absorbance measurements provided the optical parameters. Computational DFT analysis supported the application of these systems in optoelectronic devices.
Article
Biochemistry & Molecular Biology
Aleksander Smolarkiewicz-Wyczachowski, Halina Kaczmarek, Jaroslaw Piskorz, Pawel Nowak, Marta Ziegler-Borowska
Summary: The study focuses on preparing and characterizing photosensitive composites based on chitosan for photodynamic therapy. Chitosan films with a 5% addition of two BODIPY dyes were prepared and their properties were investigated. The addition of BODIPY to chitosan increased hydrophilicity, structure heterogeneity, and roughness. The presence of iodine atoms in the BODIPY structure caused a bathochromic effect and decreased the emission quantum yield in the composites. BODIPY-doped chitosan showed improved interactions with human serum albumin and acidic alpha-glycoprotein.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Biochemistry & Molecular Biology
Joanna Chalupka, Adam Sikora, Marta Ziegler-Borowska, Michal Piotr Marszall
Summary: The aim of this study was to obtain (S)-clopidogrel through the enantioselective biotransformation of clopidogrel carboxylic acid and chiral chromatographic separation using a lipase from Candida rugosa and a two-phase reaction medium containing an ionic liquid. The best kinetic resolution parameters were obtained using lipase from Candida rugosa OF, cyclohexane and [EMIM][BF4] as the reaction medium, and methanol as the acyl acceptor. The study proved the possibility of obtaining (S)-clopidogrel in a parallel with green chemistry methodology and environmentally friendly conditions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Polymer Science
Aleksander Smolarkiewicz-Wyczachowski, Halina Kaczmarek, Jaroslaw Piskorz, Marta Ziegler-Borowska
Summary: In this study, chitosan films modified by photosensitive BODIPY compounds with and without iodine atoms were prepared and their stability under thermal and UV radiation conditions was investigated. The results showed that BODIPY dyes exhibited good photochemical stability in solid chitosan matrix, but the compound with iodine atoms showed slightly lower stability compared to the one without. Additionally, BODIPY dyes did not affect the thermal stability of chitosan, but their decomposition temperature was lower in the presence of chitosan.
Article
Environmental Sciences
Piotr Macczak, Halina Kaczmarek, Marta Ziegler-Borowska
Summary: The study investigated the potential use of chitosan and its derivatives, dialdehyde chitosan and carboxymethyl chitosan, as alternative flocculants for purifying filter backwash water. The modified chitosan derivatives were successfully synthesized and characterized using various techniques. The biopolymer flocculants showed promising efficiency in removing impurities, with carboxymethyl chitosan achieving nearly 99% iron removal and 98.26% turbidity removal rates at an optimal dosage of 0.2 mg/L.
Review
Chemistry, Multidisciplinary
Piotr Szyk, Beata Czarczynska-Goslinska, Dariusz T. Mlynarczyk, Barbara Slusarska, Tomasz Kocki, Marta Ziegler-Borowska, Tomasz Goslinski
Summary: This article reviews the scientific progress and prospects of polymer-based nanoparticles as drug delivery systems for purines. These nanoparticles have the potential to enhance the therapeutic effects of purine derivatives by specific binding, increased drug retention and penetration, and can also reduce the toxic side effects of these drugs.
Article
Biochemistry & Molecular Biology
Dorota Chelminiak-Dudkiewicz, Miloslav Machacek, Jolanta Dlugaszewska, Magdalena Wujak, Aleksander Smolarkiewicz-Wyczachowski, Szymon Bocian, Kinga Mylkie, T. Goslinski, Michal P. Marszall, Marta Ziegler-Borowska
Summary: In this study, porous bacterial levan-based sponges containing cannabis oil (Lev@CBDs) were prepared and characterized. The sponges exhibited desirable physical properties and showed good performance in terms of swelling ratio, water vapor transmission rate, thermal stability, mechanical properties, antioxidant and anti-inflammatory properties. These sponges also demonstrated antibacterial activity and biocompatibility. The results suggest that Lev@CBDs have the potential to be used as wound dressings in future in vivo applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Emilia Piosik, Michal Kotkowiak, Anna Modlinska, Dorota Chelminiak-Dudkiewicz, Marta Ziegler-Borowska
Summary: This study presents a novel nanoagent with dual anticancer activity based on magnetite nanoparticles coated with aminated chitosan and immobilized with zinc(II) phthalocyanine. The synthesized nanoagent combines the superparamagnetic properties of magnetite nanoparticles and the photosensitizing potential of zinc(II) phthalocyanine, making it a promising material for dual anticancer therapy based on hyperthermia and photodynamic effects.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Environmental
Rafal Krakowiak, Robert Frankowski, Kinga Mylkie, Michal Kotkowiak, Dariusz T. Mlynarczyk, Alina Dudkowiak, Beata J. Stanisz, Agnieszka Zgola-Grzeskowiak, Marta Ziegler-Borowska, Tomasz Goslinski
Summary: Hybrid materials based on nanometric size bare anatase titanium(IV) oxide and meso-functionalized porphyrins were prepared and characterized. The hybrid materials showed higher photocatalytic activity than bare titanium(IV) oxide in the degradation of ibuprofen under UV light and had relatively good photocatalytic activity under visible light.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
