Pub Date : 2024-02-09DOI: 10.1134/s0965545x2360059x
S. A. Vshivkov, E. V. Rusinova
Abstract
Phase diagrams with UCST are constructed for systems poly(methyl methacrylate)–butanol, poly(vinyl acetate)–methanol, and poly(vinyl acetate)–2-propanol. The boundary curve of the PMMA–о-xylene system is unusual in shape, which is explained by the fact that polymer macromolecules form stereo complexes that appear during solution cooling. The thermodynamic interaction parameters χ of components and the values of χcr and critical concentration of the systems under study are calculated. With increasing temperature the value of χ decreases, which indicates that the interaction of components is improved under heating and agrees with the phase diagrams of the systems.
{"title":"Phase Transitions and Thermodynamic Interaction Parameters of Components in Poly(methyl methacrylate) and Poly(vinyl acetate)","authors":"S. A. Vshivkov, E. V. Rusinova","doi":"10.1134/s0965545x2360059x","DOIUrl":"https://doi.org/10.1134/s0965545x2360059x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Phase diagrams with UCST are constructed for systems poly(methyl methacrylate)–butanol, poly(vinyl acetate)–methanol, and poly(vinyl acetate)–2-propanol. The boundary curve of the PMMA–<i>о</i>-xylene system is unusual in shape, which is explained by the fact that polymer macromolecules form stereo complexes that appear during solution cooling. The thermodynamic interaction parameters χ of components and the values of χ<sub>cr</sub> and critical concentration of the systems under study are calculated. With increasing temperature the value of χ decreases, which indicates that the interaction of components is improved under heating and agrees with the phase diagrams of the systems.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139758493","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 : 2024-01-09DOI: 10.1134/s0965545x23600503
A. V. Shibaev, A. S. Ospennikov, G. V. Kornilaeva, V. F. Larichev, I. T. Fedyakina, Lifeng Fu, Zhuo Chen, Yangyang Yang, E. V. Karamov, Ali S. Turgiev, Liping Duan, Jun Liu, O. E. Philippova
Abstract
This work is aimed at the preparation of complexes of chitosan and hydrophobically modified (HM) chitosan with an anionic surfactant sodium dodecylbenzene sulfonate (SDBS), and at the study of the virucidal activity of the complexes and their components against SARS-CoV-2. It is shown that the introduction of a sufficient amount (4 mol%) of hydrophobic n-dodecyl side groups provides the activity of HM chitosan against SARS-CoV-2 at moderate concentrations, at which unmodified chitosan and chitosan containing a lower amount of hydrophobic groups do not show any activity. Complexes of HM chitosan with SDBS are prepared, which is proven by fluorescence spectroscopy and isothermal titration calorimetry. It is discovered that HM chitosan/SDBS complex is more active than the polymer without surfactant, and an increase of the amount of hydrophobic groups enhances the activity.
{"title":"Complexes of an Anionic Surfactant with Chitosan and Its Hydrophobic Derivatives As Disinfectants against SARS-CoV-2","authors":"A. V. Shibaev, A. S. Ospennikov, G. V. Kornilaeva, V. F. Larichev, I. T. Fedyakina, Lifeng Fu, Zhuo Chen, Yangyang Yang, E. V. Karamov, Ali S. Turgiev, Liping Duan, Jun Liu, O. E. Philippova","doi":"10.1134/s0965545x23600503","DOIUrl":"https://doi.org/10.1134/s0965545x23600503","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work is aimed at the preparation of complexes of chitosan and hydrophobically modified (HM) chitosan with an anionic surfactant sodium dodecylbenzene sulfonate (SDBS), and at the study of the virucidal activity of the complexes and their components against SARS-CoV-2. It is shown that the introduction of a sufficient amount (4 mol%) of hydrophobic n-dodecyl side groups provides the activity of HM chitosan against SARS-CoV-2 at moderate concentrations, at which unmodified chitosan and chitosan containing a lower amount of hydrophobic groups do not show any activity. Complexes of HM chitosan with SDBS are prepared, which is proven by fluorescence spectroscopy and isothermal titration calorimetry. It is discovered that HM chitosan/SDBS complex is more active than the polymer without surfactant, and an increase of the amount of hydrophobic groups enhances the activity.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139412737","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 : 2024-01-09DOI: 10.1134/s0965545x23600497
O. N. Malinkina, A. B. Shipovskaya
Abstract
Using two samples of chitosan (D-glucan) with viscosity-average molecular mass 40 × 103 and 200 × 103 as the example, the influence of diastereomer form (L- and D-) of ascorbic acid on the energetics of formation, structure, and supramolecular ordering of hetero- (D‒L) and homochiral (D‒D) polymer–acid salt complexes has been studied. It has been found that heat effect during the interaction of chitosan with L-ascorbic acid in aqueous medium and degree of protonation of the (D‒L)-salts are lower in comparison with D-isomer of the acid. The homochiral (D‒D)-salts, in contrast to the heterochiral (D‒L)-salts, have exhibited lower amount of crystallization water, high degree of crystallinity, and denser supramolecular structure with high level of inter- and intramolecular contacts.
{"title":"Energy of Salt Formation and Supramolecular Ordering of Chitosan L- and D-Ascorbates","authors":"O. N. Malinkina, A. B. Shipovskaya","doi":"10.1134/s0965545x23600497","DOIUrl":"https://doi.org/10.1134/s0965545x23600497","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using two samples of chitosan (D-glucan) with viscosity-average molecular mass 40 × 10<sup>3</sup> and 200 × 10<sup>3</sup> as the example, the influence of diastereomer form (L- and D-) of ascorbic acid on the energetics of formation, structure, and supramolecular ordering of hetero- (D‒L) and homochiral (D‒D) polymer–acid salt complexes has been studied. It has been found that heat effect during the interaction of chitosan with L-ascorbic acid in aqueous medium and degree of protonation of the (D‒L)-salts are lower in comparison with D-isomer of the acid. The homochiral (D‒D)-salts, in contrast to the heterochiral (D‒L)-salts, have exhibited lower amount of crystallization water, high degree of crystallinity, and denser supramolecular structure with high level of inter- and intramolecular contacts.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139412730","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 : 2023-12-11DOI: 10.1134/s0965545x2360045x
Sabana Ara Begum, P. S. G. Krishnan, K. Kanny
{"title":"Bio-based Polymers: a Review on Processing and 3D Printing","authors":"Sabana Ara Begum, P. S. G. Krishnan, K. Kanny","doi":"10.1134/s0965545x2360045x","DOIUrl":"https://doi.org/10.1134/s0965545x2360045x","url":null,"abstract":"","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138981008","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 use of synthetic single used plastic packaging and mulching films has serious environmental effects due to their non-degradable waste causing pollution. To replace these synthetic materials, high-strength biodegradable polymer composites of Pectin, Luffa Fiber (agro-waste) and Glycerol are synthesized by the solvent casting technique using a universal solvent. The experimentation is carried out using a 3 × 3 factorial design and the tensile behavior (tensile strength and elongation) of composites is analyzed by response surface methodology (RSM). The tensile strength of pectin containing 10% glycerol is 11.48 MPa which is increased to 19.34 MPa by incorporation of 15% luffa fiber and this composition is optimized with desirability index method (simultaneously optimization) to achieve the best results for elongation at break (188.89%) as well. The interactions between constituents of composites are characterized by FTIR spectro-scopy and scanning electron microscopic study reveals a uniform distribution of fiber. The composites have sustained thermal stability as all composites are stable up to 260°C in an inert atmosphere under TGA study. The biodegradability of composite films was observed by soil burial method and found completely degradable in 75 days. The present composites of non-toxic components with high tensile properties, sustained thermal stability and complete biodegradability are suitable for green packaging applications.
{"title":"Preparation of Ecofriendly Viable Packaging Films Based on Pectin and Agro-Waste: Thermal and Mechanical Studies by Design of Experiments Approach","authors":"Vinod Kumar, Sohan Lal, Sumit Kumar, Geetanjali Jagdeva, Parvin Kumar, Anjali Verma, Anton Kuzmin","doi":"10.1134/s0965545x23600448","DOIUrl":"https://doi.org/10.1134/s0965545x23600448","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The use of synthetic single used plastic packaging and mulching films has serious environmental effects due to their non-degradable waste causing pollution. To replace these synthetic materials, high-strength biodegradable polymer composites of Pectin, Luffa Fiber (agro-waste) and Glycerol are synthesized by the solvent casting technique using a universal solvent. The experimentation is carried out using a 3 × 3 factorial design and the tensile behavior (tensile strength and elongation) of composites is analyzed by response surface methodology (RSM). The tensile strength of pectin containing 10% glycerol is 11.48 MPa which is increased to 19.34 MPa by incorporation of 15% luffa fiber and this composition is optimized with desirability index method (simultaneously optimization) to achieve the best results for elongation at break (188.89%) as well. The interactions between constituents of composites are characterized by FTIR spectro-scopy and scanning electron microscopic study reveals a uniform distribution of fiber. The composites have sustained thermal stability as all composites are stable up to 260°C in an inert atmosphere under TGA study. The biodegradability of composite films was observed by soil burial method and found completely degradable in 75 days. The present composites of non-toxic components with high tensile properties, sustained thermal stability and complete biodegradability are suitable for green packaging applications.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567615","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 : 2023-12-01DOI: 10.1134/s0965545x24600066
Abstract
To study the effects of graphene oxide (GO) dimension on the mechanical and dielectric performance of epoxy resin (EP), two kinds of GO with different dimensions were selected and characterized by Fourier transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results showed that the two kinds of GO had similar chemical structure, but different average particle sizes of 190.1 nm (SGO) and 1510 nm (MGO), respectively. The mechanical properties, dynamic mechanical properties, and dielectric properties of the EP/GO composites are analyzed using electronic universal testing machine, Rockwell hardness tester, dynamic mechanical analysis (DMA) and broadband dielectric impedance relaxation spectrometer. Results revealed that the GO dimension plays important role in determining the dispersion of the filler in EP matrix, and further determines the mechanical properties and dielectric performance of the composites. EP/SGO with better dispersion of GO in the EP matrix exhibits better mechanical properties, higher glass transition temperature, higher dielectric constant. Related mechanism has been proposed.
摘要 为研究氧化石墨烯（GO）尺寸对环氧树脂（EP）机械性能和介电性能的影响，选取了两种不同尺寸的氧化石墨烯（GO），并通过傅立叶变换红外光谱仪（FTIR）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）和 X 射线衍射仪（XRD）对其进行了表征。结果表明，两种 GO 具有相似的化学结构，但平均粒径不同，分别为 190.1 nm（SGO）和 1510 nm（MGO）。使用电子万能试验机、洛氏硬度计、动态力学分析（DMA）和宽带介电阻抗弛豫光谱仪分析了 EP/GO 复合材料的力学性能、动态力学性能和介电性能。结果表明，GO 尺寸在决定填料在 EP 基体中的分散性方面起着重要作用，并进一步决定了复合材料的机械性能和介电性能。EP/SGO 在 EP 基体中的分散性越好，其力学性能越好，玻璃化转变温度越高，介电常数越大。提出了相关的机理。
{"title":"Effects of Graphene Oxide Dimension on the Mechanical and Dielectric Properties of Epoxy Resin","authors":"","doi":"10.1134/s0965545x24600066","DOIUrl":"https://doi.org/10.1134/s0965545x24600066","url":null,"abstract":"<span> <h3>Abstract</h3> <p>To study the effects of graphene oxide (GO) dimension on the mechanical and dielectric performance of epoxy resin (EP), two kinds of GO with different dimensions were selected and characterized by Fourier transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results showed that the two kinds of GO had similar chemical structure, but different average particle sizes of 190.1 nm (SGO) and 1510 nm (MGO), respectively. The mechanical properties, dynamic mechanical properties, and dielectric properties of the EP/GO composites are analyzed using electronic universal testing machine, Rockwell hardness tester, dynamic mechanical analysis (DMA) and broadband dielectric impedance relaxation spectrometer. Results revealed that the GO dimension plays important role in determining the dispersion of the filler in EP matrix, and further determines the mechanical properties and dielectric performance of the composites. EP/SGO with better dispersion of GO in the EP matrix exhibits better mechanical properties, higher glass transition temperature, higher dielectric constant. Related mechanism has been proposed.</p> </span>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140299040","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 : 2023-12-01DOI: 10.1134/s0965545x2460025x
Abstract
The effect of ZrO2 nanoparticles on the structural, electrical, and dielectric properties of polyaniline was studied. ZrO2 nanoparticles with an average size of 8 nm were synthesized by a simple precipitation method and their tetragonal and monoclinic crystalline phase was confirmed. Polyaniline and its nanocomposite with ZrO2 have been synthesized by chemical oxidation method using CH3COOH as a doping agent and APS as an oxidant. The synthesized composites were analyzed by infrared spectroscopy, X-ray diffraction, scanning electronic microscopy, AC conductivity, dielectric and impedance spectroscopy. In Nyquist plots, systematic decrement in the semicircle size was observed with growth of ZrO2 content. The dielectric constant in the PANI/ZrO2 composite has been increased with an increase in weight content of ZrO2 in PANI matrix and exhibited the Maxwell–Wagner–Sillars effect.
{"title":"Investigation on Structural, Electrical and Dielectric Properties of Polyaniline/ZrO2 Composite","authors":"","doi":"10.1134/s0965545x2460025x","DOIUrl":"https://doi.org/10.1134/s0965545x2460025x","url":null,"abstract":"<span> <h3>Abstract</h3> <p>The effect of ZrO<sub>2</sub> nanoparticles on the structural, electrical, and dielectric properties of polyaniline was studied. ZrO<sub>2</sub> nanoparticles with an average size of 8 nm were synthesized by a simple precipitation method and their tetragonal and monoclinic crystalline phase was confirmed. Polyaniline and its nanocomposite with ZrO<sub>2</sub> have been synthesized by chemical oxidation method using CH<sub>3</sub>COOH as a doping agent and APS as an oxidant. The synthesized composites were analyzed by infrared spectroscopy, X-ray diffraction, scanning electronic microscopy, AC conductivity, dielectric and impedance spectroscopy. In Nyquist plots, systematic decrement in the semicircle size was observed with growth of ZrO<sub>2</sub> content. The dielectric constant in the PANI/ZrO<sub>2</sub> composite has been increased with an increase in weight content of ZrO<sub>2</sub> in PANI matrix and exhibited the Maxwell–Wagner–Sillars effect.</p> </span>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.206,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298937","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 : 2023-11-30DOI: 10.1134/s0965545x23701195
M. M. Gasymov, S. Z. Rogovina, O. P. Kuznetsova, V. G. Shevchenko, A. A. Berlin
Abstract
Nanocomposites of low-density polyethylene (LDPE) with a nanocarbon nanofiller, reduced graphene oxide (RGO) of different composition, have been obtained under conditions of high-temperature shear deformations in a rotary disperser. Structure and properties of the obtained nanocomposites have been studied using a wide range of physico-chemical methods of analysis, including laser diffraction, scanning electron microscopy, and measurement of mechanical and electrical parameters. The influence of the components ratio in the compositions on the characteristics of the resulting materials has been demonstrated.
{"title":"Solid-Phase Production of Low-Density Polyethylene Compositions with Reduced Graphene Oxide under Shear Deformations","authors":"M. M. Gasymov, S. Z. Rogovina, O. P. Kuznetsova, V. G. Shevchenko, A. A. Berlin","doi":"10.1134/s0965545x23701195","DOIUrl":"https://doi.org/10.1134/s0965545x23701195","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Nanocomposites of low-density polyethylene (LDPE) with a nanocarbon nanofiller, reduced graphene oxide (RGO) of different composition, have been obtained under conditions of high-temperature shear deformations in a rotary disperser. Structure and properties of the obtained nanocomposites have been studied using a wide range of physico-chemical methods of analysis, including laser diffraction, scanning electron microscopy, and measurement of mechanical and electrical parameters. The influence of the components ratio in the compositions on the characteristics of the resulting materials has been demonstrated.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138516502","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 : 2023-11-30DOI: 10.1134/s0965545x23701213
Aysel Aydın Kocaeren
Abstract
The carbazole compound (C-C8) containing aromatic ring with 8 carbon alkyl group (C8) was synthesized. The thiophene-derived compound that was abbreviated as (T) was synthesized, and (CT-C8) was obtained by adding of (T) to the starting compound (C-C8). Additionally, the electrochemical polymers of CT-C8 were synthesized and accumulated onto different surface types such as an indium tin oxide (ITO) coated glass, aluminum (Al) layer, copper (Cu) sheet and pen tip electrode (PTE). The electrochemical syntheses of the polymers were performed by using 0.05 M NaClO4 as an electrolyte in acetonitrile (AN) solvent. The electrochemical behaviors of the polymers were also investigated by taking the cyclic voltammeric measurements with a triple electrode system, and the electrochemical behaviors of the coated polymers on different electrode surfaces were also researched in the presence of Fe3+ and Fe2+ metals. According to the obtained voltammogram results, it can be said that the electrochemically synthesized polymers on different electrode surfaces were sensitive to Fe3+ metal and they could be used as an electrochemical sensor for all electrode surfaces as mentioned above. For the performed electrochemical measurements, the oxidation and reduction peak values obtained for different electrode surfaces were different from each other. When it is desired to examine the electrochemical property of a material, there is a need to search for more useful and economical insoles, since the conductive surface like ITO is deformed after repeated applications and expensive. This study, which offers an alternative conductive base to replace ITO, is important in this regard.
{"title":"Electrochemical Fe3+ Ion Sensor Applications on Different Electrode Surfaces","authors":"Aysel Aydın Kocaeren","doi":"10.1134/s0965545x23701213","DOIUrl":"https://doi.org/10.1134/s0965545x23701213","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The carbazole compound (C-C<sub>8</sub>) containing aromatic ring with 8 carbon alkyl group (C<sub>8</sub>) was synthesized. The thiophene-derived compound that was abbreviated as (T) was synthesized, and (CT-C<sub>8</sub>) was obtained by adding of (T) to the starting compound (C-C<sub>8</sub>). Additionally, the electrochemical polymers of CT-C<sub>8</sub> were synthesized and accumulated onto different surface types such as an indium tin oxide (ITO) coated glass, aluminum (Al) layer, copper (Cu) sheet and pen tip electrode (PTE). The electrochemical syntheses of the polymers were performed by using 0.05 M NaClO<sub>4</sub> as an electrolyte in acetonitrile (AN) solvent. The electrochemical behaviors of the polymers were also investigated by taking the cyclic voltammeric measurements with a triple electrode system, and the electrochemical behaviors of the coated polymers on different electrode surfaces were also researched in the presence of Fe<sup>3+</sup> and Fe<sup>2+</sup> metals. According to the obtained voltammogram results, it can be said that the electrochemically synthesized polymers on different electrode surfaces were sensitive to Fe<sup>3+</sup> metal and they could be used as an electrochemical sensor for all electrode surfaces as mentioned above. For the performed electrochemical measurements, the oxidation and reduction peak values obtained for different electrode surfaces were different from each other. When it is desired to examine the electrochemical property of a material, there is a need to search for more useful and economical insoles, since the conductive surface like ITO is deformed after repeated applications and expensive. This study, which offers an alternative conductive base to replace ITO, is important in this regard.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138516540","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 : 2023-11-30DOI: 10.1134/s0965545x23701201
S. B. Khaytmetova, A. S. Turaev, G. A. Khalilova, B. I. Muhitdinov, S. R. Makkamboeva
Abstract
Branched polysaccharides have been isolated from basidiomycete raw materials of locally growing and cultivated Ganoderma lucidum. It has been found that the isolated fractions contain branched polysaccharides in the form of complexes with melanin. After purification of polysaccharides by ion exchange chromatography from locally growing and cultivated basidial raw materials, two fractions have been obtained: neutral polysaccharides of locally growing Ganoderma lucidum (GW-1), cultivated Ganoderma lucidum (GWL-1) with a yield of 25.71 and 29.85%, respectively, and anionic polysaccharides of locally growing Ganoderma lucidum (GW-2), cultivated Ganoderma lucidum (GWL-2), with a yield of 5.26 and 4.19%. The physicochemical properties of the obtained samples have been studied by IR and UV spectroscopies. The purity degree of fractions of branched polysaccharides has been determined. Using gas chromatography, one-dimensional (13C NMR, 1H NMR), and two-dimensional (COSY, TOCSY, HSQC, HMBC, NOESY) NMR spectroscopies, the compositions and molecular structures of the obtained polysaccharide samples have been determined. The results showed that the isolated and purified polysaccharides are β-glucan-type branched polysaccharides that have branch point (1,4,6)- and (1,3,6)-linked glucopyranose residues.
{"title":"Isolation and Physicochemical Characteristics of Water-Soluble Polysaccharide from Locally Growing and Cultivated Basidium Raw Materials of Ganoderma lucidum","authors":"S. B. Khaytmetova, A. S. Turaev, G. A. Khalilova, B. I. Muhitdinov, S. R. Makkamboeva","doi":"10.1134/s0965545x23701201","DOIUrl":"https://doi.org/10.1134/s0965545x23701201","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Branched polysaccharides have been isolated from basidiomycete raw materials of locally growing and cultivated <i>Ganoderma lucidum</i>. It has been found that the isolated fractions contain branched polysaccharides in the form of complexes with melanin. After purification of polysaccharides by ion exchange chromatography from locally growing and cultivated basidial raw materials, two fractions have been obtained: neutral polysaccharides of locally growing <i>Ganoderma lucidum</i> (GW-1), cultivated <i>Ganoderma lucidum</i> (GWL-1) with a yield of 25.71 and 29.85%, respectively, and anionic polysaccharides of locally growing <i>Ganoderma lucidum</i> (GW-2), cultivated <i>Ganoderma lucidum</i> (GWL-2), with a yield of 5.26 and 4.19%. The physicochemical properties of the obtained samples have been studied by IR and UV spectroscopies. The purity degree of fractions of branched polysaccharides has been determined. Using gas chromatography, one-dimensional (<sup>13</sup>C NMR, <sup>1</sup>H NMR), and two-dimensional (COSY, TOCSY, HSQC, HMBC, NOESY) NMR spectroscopies, the compositions and molecular structures of the obtained polysaccharide samples have been determined. The results showed that the isolated and purified polysaccharides are β-glucan-type branched polysaccharides that have branch point (1,4,6)- and (1,3,6)-linked glucopyranose residues.</p>","PeriodicalId":738,"journal":{"name":"Polymer Science, Series A","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138516542","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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