Pub Date : 2024-03-25DOI: 10.1134/s0965545x23600357
Mitra Baghali, Hakimeh Ziyadi, Seeram Ramakrishna, Anna Chernova, Antonio Di Martino
Abstract
Due to wide application of biomaterials in drug delivery systems for wound healing, this research work is focused on the development and characterization of a Gelatin/Glycerol composite film for delivering the antibiotic Erythromycin. The aim was preparing gelatin/glycerol films loaded with erythromycin suitable for a future application as a patch for skin wound healing application. A set of films were prepared with various gelatin to glycerol weight ratio and the impact of glycerol content on the mechanical, physicochemical and thermal behavior of film evaluated. Erythromycin was loaded into the film and the antibacterial activity evaluated versus E.coli and S.aureus. Results demonstrate a correlation between the content of glycerol and the physico-chemical properties of the film. The Ge/GY films containing the drug show good antibacterial effects only against Staphylococcus aureus bacteria. TGA and DSC of Ge/ GY thin films showed thermal stability until 110°C, however, the complete decomposition occurred at 350°C.
{"title":"Effect of Glycerol Content in Gelatin/Glycerol Composite Films Loaded with Erythromycin","authors":"Mitra Baghali, Hakimeh Ziyadi, Seeram Ramakrishna, Anna Chernova, Antonio Di Martino","doi":"10.1134/s0965545x23600357","DOIUrl":"https://doi.org/10.1134/s0965545x23600357","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Due to wide application of biomaterials in drug delivery systems for wound healing, this research work is focused on the development and characterization of a Gelatin/Glycerol composite film for delivering the antibiotic Erythromycin. The aim was preparing gelatin/glycerol films loaded with erythromycin suitable for a future application as a patch for skin wound healing application. A set of films were prepared with various gelatin to glycerol weight ratio and the impact of glycerol content on the mechanical, physicochemical and thermal behavior of film evaluated. Erythromycin was loaded into the film and the antibacterial activity evaluated versus <i>E.coli</i> and <i>S.aureus</i>. Results demonstrate a correlation between the content of glycerol and the physico-chemical properties of the film. The Ge/GY films containing the drug show good antibacterial effects only against <i>Staphylococcus aureus</i> bacteria. TGA and DSC of Ge/ GY thin films showed thermal stability until 110°C, however, the complete decomposition occurred at 350°C.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dual-modal fluorescent/magnetic resonance imaging attracts more and more attentions in biomedical applications. Herein, star-shaped poly(ε-caprolactone)-b-poly(N-vinylpyrrolidone) amphiphilic copolymer with a tetrakis-(4-amino)-terminated tetraphenylethylene core was synthesized. Then, dual-functional nano micelles were achieved via a facile self-assembly of the star copolymer and in situ encapsulation of iron oxide nanoparticles. The fluorescent characteristic of the tetraphenylethylene moiety and encapsulation of iron oxide endowed the resultant dual-functional micelles with bright fluorescence and superparamagnetic properties, which indicated that the PCL segments coated on magnetic nanoparticles is effective at separating the conjugated core from iron oxide nanoparticles to minimize fluorescence quenching. The obtained micelles were found to have a good colloidal and fluorescent stability in different environment. In vitro studies revealed that these dual-functional micelles could serve as an effective fluorescent probe to achieve imaging of MCF-7 cells without obvious cytotoxicity. Thus, this work provides a facile strategy to fabricate fluorescent-magnetic dual-functional micelles for dual-modal imaging applications.
{"title":"Fabrication of Dual-Functional Micelles Based on Star-Shaped Copolymer for Bioimaging","authors":"Chaofan Liu, Shenglong Liao, Shuyin Zhong, Qingping Song, Jiangang Gao, Ying Lin","doi":"10.1134/s0965545x24600169","DOIUrl":"https://doi.org/10.1134/s0965545x24600169","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Dual-modal fluorescent/magnetic resonance imaging attracts more and more attentions in biomedical applications. Herein, star-shaped poly(ε-caprolactone)-<i>b</i>-poly(<i>N</i>-vinylpyrrolidone) amphiphilic copolymer with a tetrakis-(4-amino)-terminated tetraphenylethylene core was synthesized. Then, dual-functional nano micelles were achieved via a facile self-assembly of the star copolymer and in situ encapsulation of iron oxide nanoparticles. The fluorescent characteristic of the tetraphenylethylene moiety and encapsulation of iron oxide endowed the resultant dual-functional micelles with bright fluorescence and superparamagnetic properties, which indicated that the PCL segments coated on magnetic nanoparticles is effective at separating the conjugated core from iron oxide nanoparticles to minimize fluorescence quenching. The obtained micelles were found to have a good colloidal and fluorescent stability in different environment. In vitro studies revealed that these dual-functional micelles could serve as an effective fluorescent probe to achieve imaging of MCF-7 cells without obvious cytotoxicity. Thus, this work provides a facile strategy to fabricate fluorescent-magnetic dual-functional micelles for dual-modal imaging applications.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Biodegradable poly(ɛ-caprolactone) (PCL), which is used in bioengineering applications thanks to its mechanical and biodegradable properties, it used as a polymer matrix in this study. The nanocomposite of PCL reinforced with recycled red mill scale PCL/RS has been prepared via ultrasonic mixing by solution casting technique at different amounts of RS (1, 5, 10, and 20 wt %), while virgin PCL was also produced for comparison. The structural, thermal, mechanical, and optical behaviors of PCL/RS nanocomposite films have been investigated. Raman spectroscopy shows that small amounts of particles ≤10 wt % may act as nucleation sites for the growth of polymer crystallites; While large amounts of particles will destroy crystallization zones. Blue shifts in spectrum Raman might be caused by the electronic interactions associated with charge transfer between PCL and RS nanoparticles. The XRD results is in good agreement with the Raman results that the crystallinity of esters increases in PCL/RS 10 wt % film. The melting temperature Tm of the nanocomposites is in the order of PCL/RS 1 wt % (71.1°C) > PCL/RS 5 wt % (71°C) > PCL/RS 10 wt % (70.3°C). We note that it has a resemblance in the values established by DRX and DSC, the crystallinity rate increases with the increase in the filler content 45 < 47 < 69 < 74.5. The nanocomposite materials prepared have UV-protective properties. Tensile results increase with an slight increase in RS filler at 5 wt % is 2 MPa, in comparison with PCL/RS 10 wt % (~1 MPa this result yields flexibility of the film and indicates good dispersion of RS in nanocomposite, resulting better interfacial adhesion.
{"title":"Characterization of Nanocomposites Based on Poly(ε-caprolactone) Filled with Recycled Red Mill Scale","authors":"Leila Djahnit, Samira Maou, Saida Soualmi, Rachid Dellali, Mazouri Bennama, Khaled El-Miloudi","doi":"10.1134/s0965545x23600382","DOIUrl":"https://doi.org/10.1134/s0965545x23600382","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Biodegradable poly(ɛ-caprolactone) (PCL), which is used in bioengineering applications thanks to its mechanical and biodegradable properties, it used as a polymer matrix in this study. The nanocomposite of PCL reinforced with recycled red mill scale PCL/RS has been prepared via ultrasonic mixing by solution casting technique at different amounts of RS (1, 5, 10, and 20 wt %), while virgin PCL was also produced for comparison. The structural, thermal, mechanical, and optical behaviors of PCL/RS nanocomposite films have been investigated. Raman spectroscopy shows that small amounts of particles ≤10 wt % may act as nucleation sites for the growth of polymer crystallites; While large amounts of particles will destroy crystallization zones. Blue shifts in spectrum Raman might be caused by the electronic interactions associated with charge transfer between PCL and RS nanoparticles. The XRD results is in good agreement with the Raman results that the crystallinity of esters increases in PCL/RS 10 wt % film. The melting temperature <i>T</i><sub>m</sub> of the nanocomposites is in the order of PCL/RS 1 wt % (71.1°C) > PCL/RS 5 wt % (71°C) > PCL/RS 10 wt % (70.3°C). We note that it has a resemblance in the values established by DRX and DSC, the crystallinity rate increases with the increase in the filler content 45 < 47 < 69 < 74.5. The nanocomposite materials prepared have UV-protective properties. Tensile results increase with an slight increase in RS filler at 5 wt % is 2 MPa, in comparison with PCL/RS 10 wt % (~1 MPa this result yields flexibility of the film and indicates good dispersion of RS in nanocomposite, resulting better interfacial adhesion.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cross-linking of bacterial cellulose (BC), hydroxypropyl methylcellulose (HPMC), and hyaluronic acid (HA) accomplished with the Copper (I) catalyzed azide-alkyne cycloaddition (CuAAC) click reaction was investigated to obtain the multicomponent hydrogels that allow selective control of material properties. Click chemistry is one of many design methodologies that can be used to create hydrogels for multi-component systems. BC, HPMC, and HA are the most preferred and suitable natural polymers for tissue engineering studies. However, in order to combine their properties in a synergistic way, they must be functionalized to interact with each other. In this study, azide-functional HA was achieved by the reaction of hyaluronic acid with 1-azido-2,3-epoxypropane. To obtain multicomponent hydrogel alkyne-terminated cellulose is also prepared. The cellulose and hyaluronic acid functionalization was confirmed by using FTIR and NMR analysis. The crosslinking reaction took place at ambient conditions for 24 h. It was observed that the swelling capacity of the multi-component hydrogel declined with the increasing amount of BC due to its high crosslinking degree. In addition, the porous morphology of hydrogels makes them suitable for wound dressing applications. SEM results revealed that pore size and porosity decreased with increasing BC concentration. MTT assay demonstrated that the hydrogels promote cell proliferation and adhesion for 3T3 cells. In vitro cell culturing within the hydrogel demonstrated good cell spreading.
摘要 通过铜（I）催化的叠氮-炔环加成（CuAAC）单击反应，研究了细菌纤维素（BC）、羟丙基甲基纤维素（HPMC）和透明质酸（HA）的交联，以获得可选择性控制材料特性的多组分水凝胶。点击化学是可用于制造多组分系统水凝胶的多种设计方法之一。BC、HPMC 和 HA 是组织工程研究中最受欢迎和最合适的天然聚合物。然而，为了以协同增效的方式将它们的特性结合在一起，必须对它们进行官能化处理，使其能够相互影响。在本研究中，通过透明质酸与 1-叠氮-2,3-环氧丙烷的反应实现了叠氮功能化 HA。为了获得多组分水凝胶，还制备了炔端纤维素。傅立叶变换红外光谱和核磁共振分析证实了纤维素和透明质酸的功能化。交联反应在环境条件下进行了 24 小时。观察发现，由于 BC 的交联度较高，多组分水凝胶的溶胀能力随着 BC 用量的增加而下降。此外，水凝胶的多孔形态使其适合用于伤口敷料。扫描电镜结果显示，孔径和孔隙率随着 BC 浓度的增加而减小。MTT 试验表明，水凝胶能促进 3T3 细胞的增殖和粘附。体外细胞培养结果表明，水凝胶具有良好的细胞铺展性。
{"title":"Development of Bacterial Cellulose-Hyaluronic Acid Multicomponent Hydrogels via Click Chemistry for Biomedical Applications","authors":"Şeyma Turan Okulmuş, Burcu Oktay, Dilek Kazan, Nilhan Kayaman Apohan","doi":"10.1134/s0965545x23600564","DOIUrl":"https://doi.org/10.1134/s0965545x23600564","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The cross-linking of bacterial cellulose (BC), hydroxypropyl methylcellulose (HPMC), and hyaluronic acid (HA) accomplished with the Copper (I) catalyzed azide-alkyne cycloaddition (CuAAC) click reaction was investigated to obtain the multicomponent hydrogels that allow selective control of material properties. Click chemistry is one of many design methodologies that can be used to create hydrogels for multi-component systems. BC, HPMC, and HA are the most preferred and suitable natural polymers for tissue engineering studies. However, in order to combine their properties in a synergistic way, they must be functionalized to interact with each other. In this study, azide-functional HA was achieved by the reaction of hyaluronic acid with 1-azido-2,3-epoxypropane. To obtain multicomponent hydrogel alkyne-terminated cellulose is also prepared. The cellulose and hyaluronic acid functionalization was confirmed by using FTIR and NMR analysis. The crosslinking reaction took place at ambient conditions for 24 h. It was observed that the swelling capacity of the multi-component hydrogel declined with the increasing amount of BC due to its high crosslinking degree. In addition, the porous morphology of hydrogels makes them suitable for wound dressing applications. SEM results revealed that pore size and porosity decreased with increasing BC concentration. MTT assay demonstrated that the hydrogels promote cell proliferation and adhesion for 3T3 cells. In vitro cell culturing within the hydrogel demonstrated good cell spreading.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1134/s0965545x23600552
Akshita Srivastava, Manu, Rajinder K. Gupta
Abstract
In the present investigation synthesis of Xanthan Gum (XG-g-PAAcoAM), Lignosulphonate sodium salt (LS-g-PAAcoAM), and their combination (XG/LS-g-PAAcoAM) based hydrogels by grafting them onto acrylic acid and acrylamide for efficient removal of Methylene Blue dye have been reported. The results were found to be reliable with a removal rate exceeding 91% when administered at a dosage of 0.2 g in a 20 mL solution of Methylene blue dye over a period of 7 h. The hydrogels have been characterized by various techniques using Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and X-ray diffraction analysis. Among the three commonly used isotherms (Langmuir, Freundlich, and Temkin), the Freundlich isotherm model exhibits the highest level of fit for the dye adsorption as evident with the R2 value of 0.99. This study provides a meaningful comparative insight towards using these natural polymers i.e., XG and LS as feedstock for hydrogel synthesis and efficient adsorbent for wastewater treatment applications.
{"title":"Xanthan Gum and Lignin Grafted Chemically Crosslinked Hydrogels for Dye Removal: Synthesis, Characterization and Isotherms Studies","authors":"Akshita Srivastava, Manu, Rajinder K. Gupta","doi":"10.1134/s0965545x23600552","DOIUrl":"https://doi.org/10.1134/s0965545x23600552","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the present investigation synthesis of Xanthan Gum (XG-<i>g</i>-PAAcoAM), Lignosulphonate sodium salt (LS-<i>g</i>-PAAcoAM), and their combination (XG/LS-<i>g</i>-PAAcoAM) based hydrogels by grafting them onto acrylic acid and acrylamide for efficient removal of Methylene Blue dye have been reported. The results were found to be reliable with a removal rate exceeding 91% when administered at a dosage of 0.2 g in a 20 mL solution of Methylene blue dye over a period of 7 h. The hydrogels have been characterized by various techniques using Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and X-ray diffraction analysis. Among the three commonly used isotherms (Langmuir, Freundlich, and Temkin), the Freundlich isotherm model exhibits the highest level of fit for the dye adsorption as evident with the <i>R</i><sup>2</sup> value of 0.99. This study provides a meaningful comparative insight towards using these natural polymers i.e., XG and LS as feedstock for hydrogel synthesis and efficient adsorbent for wastewater treatment applications.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1134/s0965545x2460008x
A. V. Birdibekova, E. A. Starostina, A. S. Kuryanova, N. A. Aksenova, P. S. Timashev, T. A. Akopova, T. S. Demina
Abstract
The surface modification of polycaprolactone and polycaprolactone/polylactide mixed films was carried out by preliminary surface activation in NaOH. Subsequent layer-by-layer deposition of coatings based on polyelectrolyte complexes of the oppositely charged polysaccharides: chitosan and hyaluronic acid, was carried out. The effect of surface activation was studied using contact angle measurements, surface analysis and gravimetric data. The characterization of the polyelectrolyte complex coatings using gravimetric analysis, goniometric and micrometer measurements, scanning electron, optical and fluorescence microscopy, and FTIR-ATR spectroscopy confirmed the formation of a uniform coating with a thickness of about 30 μm, which is not prone to peeling from the substrate.
{"title":"Layer-by-Layer Deposition of Chitosan/Hyaluronic Acid Polyelectrolyte Complex Coatings onto Polyester Films","authors":"A. V. Birdibekova, E. A. Starostina, A. S. Kuryanova, N. A. Aksenova, P. S. Timashev, T. A. Akopova, T. S. Demina","doi":"10.1134/s0965545x2460008x","DOIUrl":"https://doi.org/10.1134/s0965545x2460008x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The surface modification of polycaprolactone and polycaprolactone/polylactide mixed films was carried out by preliminary surface activation in NaOH. Subsequent layer-by-layer deposition of coatings based on polyelectrolyte complexes of the oppositely charged polysaccharides: chitosan and hyaluronic acid, was carried out. The effect of surface activation was studied using contact angle measurements, surface analysis and gravimetric data. The characterization of the polyelectrolyte complex coatings using gravimetric analysis, goniometric and micrometer measurements, scanning electron, optical and fluorescence microscopy, and FTIR-ATR spectroscopy confirmed the formation of a uniform coating with a thickness of about 30 μm, which is not prone to peeling from the substrate.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1134/s0965545x24600108
A. I. Loskutov, V. B. Oshurko, S. A. Loskutov
Abstract
The synthesis of peptide nanocomposites from water-soluble components has many advantages. However, this raises the question of maintaining the functional properties and chemical structure of composites solid layers during long-term storage at ambient conditions. The processes of structural transformations during different stages of crystallization of hectapeptide composites with silver and gold nanoparticles in humid atmosphere were studied. The influence of temperature, humidity, nature of the substrate, its wetting, conformation of peptide molecules on the structure and electrophysical properties of the composites was considered also. Similarly to polymers two stages of crystallization were found: the initial fast and the subsequent slow. Unlike polymers, an increase in temperature does not affect this process, but even slows it down. Despite significant changes in the surface morphology of composites their electrophysical properties and conformation of molecules do not change. An increase in humidity accelerates the processes of the structural transitions. The results show that the changes in the surface morphology of PT composites under the influence of humidity relate only to the PT matrix itself and not to their locations or conformation of molecule.
{"title":"Effect of Morphogenesis of the Surface of Peptide Nanocomposites on their Structure and Properties","authors":"A. I. Loskutov, V. B. Oshurko, S. A. Loskutov","doi":"10.1134/s0965545x24600108","DOIUrl":"https://doi.org/10.1134/s0965545x24600108","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The synthesis of peptide nanocomposites from water-soluble components has many advantages. However, this raises the question of maintaining the functional properties and chemical structure of composites solid layers during long-term storage at ambient conditions. The processes of structural transformations during different stages of crystallization of hectapeptide composites with silver and gold nanoparticles in humid atmosphere were studied. The influence of temperature, humidity, nature of the substrate, its wetting, conformation of peptide molecules on the structure and electrophysical properties of the composites was considered also. Similarly to polymers two stages of crystallization were found: the initial fast and the subsequent slow. Unlike polymers, an increase in temperature does not affect this process, but even slows it down. Despite significant changes in the surface morphology of composites their electrophysical properties and conformation of molecules do not change. An increase in humidity accelerates the processes of the structural transitions. The results show that the changes in the surface morphology of PT composites under the influence of humidity relate only to the PT matrix itself and not to their locations or conformation of molecule.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1134/s0965545x24600078
T. Gobikannan, P. Subramani, S. J. Pawar
Abstract
Basalt fibres are gaining interest in the fibre-reinforced thermoplastic industries around the world. In this work, basalt and glass short fibres reinforced polypropylene composites were produced using twin-screw extrusion and followed by injection molding. To carry out a comprehensive study on physical and mechanical properties, the composites were produced with different proportions of fibre loadings (for both fibres 5, 10, and 20 wt %). Composites were characterized and studied for tensile (at different strain rates), flexural (at different speeds), impact, dynamic mechanical analysis, density, tensile-relaxation, melt flow index test, and rheometric properties. Results indicate that tensile, flexural, dynamic mechanical analysis, and tensile-relaxation properties increased with increasing fibre proportions in the polypropylene matrix. The melt flow and rheometric behaviors of polypropylene decreased significantly with the addition of short fibres into the matrix. The overall results showed that basalt fibres can be potentially used as replacements for glass fibre to develop these thermoplastic composites.
{"title":"A Comprehensive Study on Physical and Mechanical Properties of Glass/Basalt Short Fibre Reinforced Thermoplastic Composites","authors":"T. Gobikannan, P. Subramani, S. J. Pawar","doi":"10.1134/s0965545x24600078","DOIUrl":"https://doi.org/10.1134/s0965545x24600078","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Basalt fibres are gaining interest in the fibre-reinforced thermoplastic industries around the world. In this work, basalt and glass short fibres reinforced polypropylene composites were produced using twin-screw extrusion and followed by injection molding. To carry out a comprehensive study on physical and mechanical properties, the composites were produced with different proportions of fibre loadings (for both fibres 5, 10, and 20 wt %). Composites were characterized and studied for tensile (at different strain rates), flexural (at different speeds), impact, dynamic mechanical analysis, density, tensile-relaxation, melt flow index test, and rheometric properties. Results indicate that tensile, flexural, dynamic mechanical analysis, and tensile-relaxation properties increased with increasing fibre proportions in the polypropylene matrix. The melt flow and rheometric behaviors of polypropylene decreased significantly with the addition of short fibres into the matrix. The overall results showed that basalt fibres can be potentially used as replacements for glass fibre to develop these thermoplastic composites.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1134/s0965545x24600121
M. Ya. Goikhman, I. V. Podeshvo, N. L. Loretsyan, I. V. Gofman, V. D. Krasikov, I. I. Malakhova, L. S. Litvinova, E. N. Bykova, I. A. Nasirova, A. V. Yakimansky
Abstract
New monomers of the biquinoline series—diyldimethanamines—have been synthesized, and polymers having biquinoline units in the main chain and their metal–polymer complexes with cuprous chloride have been obtained using these monomers. The resulting starting compounds and polymers have been studied using NMR spectroscopy, HPLC, and simultaneous thermal (thermogravimetric and differential thermal) analysis, and the mechanical characteristics of the polymers and metal–polymer complexes have been examined. It has been shown that the structure and physicochemical properties of the polymers based on synthesized diyldimethanediamines largely depend on the position of groups in the biquinoline moiety and the presence of interchain coordination bonds in the polymer.
{"title":"Polymers with [2,2′-Biquinoline]-diyldimethanamine Units in the Main Chain and Their Metal–Polymer Complexes with Copper(I)","authors":"M. Ya. Goikhman, I. V. Podeshvo, N. L. Loretsyan, I. V. Gofman, V. D. Krasikov, I. I. Malakhova, L. S. Litvinova, E. N. Bykova, I. A. Nasirova, A. V. Yakimansky","doi":"10.1134/s0965545x24600121","DOIUrl":"https://doi.org/10.1134/s0965545x24600121","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>New monomers of the biquinoline series—diyldimethanamines—have been synthesized, and polymers having biquinoline units in the main chain and their metal–polymer complexes with cuprous chloride have been obtained using these monomers. The resulting starting compounds and polymers have been studied using NMR spectroscopy, HPLC, and simultaneous thermal (thermogravimetric and differential thermal) analysis, and the mechanical characteristics of the polymers and metal–polymer complexes have been examined. It has been shown that the structure and physicochemical properties of the polymers based on synthesized diyldimethanediamines largely depend on the position of groups in the biquinoline moiety and the presence of interchain coordination bonds in the polymer.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-25DOI: 10.1134/s0965545x23600588
E. A. Litmanovich, O. A. Pyshkina, D. E. Ochenkov, S. A. Pantsernaya, R. V. Grossman, V. E. Savchenkova, M. V. Zhilkin, V. G. Sergeyev
Abstract
For the first time, the interaction of polyvinyl alcohol and a copolymer of sodium salts of styrenesulfonic and maleic acids in aqueous solutions has been studied using the techniques of static and dynamic light scattering and capillary viscometry. It has been shown that hydrogen-bonded complexes are formed between them, with compaction of polyvinyl alcohol coils occurring in dilute solutions and additional structuring of the solution in semidilute solutions. The activation parameters (enthalpy and entropy) of viscous flow have been assessed, confirming the formation of the complexes. The concentration regimes of solutions of polyvinyl alcohol, the copolymer, and the complexes have been studied. It has been shown that the semidilute entanglement-free regime disappears in solutions of the complexes.
{"title":"Complexes Based on Polyvinyl Alcohol and a Copolymer of Sodium Salts of Styrenesulfonic and Maleic Acids","authors":"E. A. Litmanovich, O. A. Pyshkina, D. E. Ochenkov, S. A. Pantsernaya, R. V. Grossman, V. E. Savchenkova, M. V. Zhilkin, V. G. Sergeyev","doi":"10.1134/s0965545x23600588","DOIUrl":"https://doi.org/10.1134/s0965545x23600588","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>For the first time, the interaction of polyvinyl alcohol and a copolymer of sodium salts of styrenesulfonic and maleic acids in aqueous solutions has been studied using the techniques of static and dynamic light scattering and capillary viscometry. It has been shown that hydrogen-bonded complexes are formed between them, with compaction of polyvinyl alcohol coils occurring in dilute solutions and additional structuring of the solution in semidilute solutions. The activation parameters (enthalpy and entropy) of viscous flow have been assessed, confirming the formation of the complexes. The concentration regimes of solutions of polyvinyl alcohol, the copolymer, and the complexes have been studied. It has been shown that the semidilute entanglement-free regime disappears in solutions of the complexes.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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