Pub Date : 1900-01-01DOI: 10.36648/2471-9935.5.1.45
Hwei Leong Ong, Kristina T. Constantopoulos, M. Ginic-Markovic, S. Clarke
Multi-walled carbon nanotubes (MWCNTs) and other low molecular weight were functionalized with an alkyne group via an urethane bond in an attempt to attach to various azide-functionalized silanes, including polyhedral oligomeric silesquioxane (POSS), via the Cu (I)-catalysed [3+2] Huisgen cycloaddition “click” reaction. FTIR spectroscopy and NMR analysis were utilized to follow the introduction of the alkyne-and azide-groups onto their respective particles, as well as their consumption in the final POSS-MWCNT nanohybrid product. This approach provides a simple and convenient route to effectively functionalize not just silanes and POSS, but also a wide variety of nanoparticles, onto the surface of CNTs.
{"title":"Study into the attachment of small and large silanes to carbon nanotube via click chemistry","authors":"Hwei Leong Ong, Kristina T. Constantopoulos, M. Ginic-Markovic, S. Clarke","doi":"10.36648/2471-9935.5.1.45","DOIUrl":"https://doi.org/10.36648/2471-9935.5.1.45","url":null,"abstract":"Multi-walled carbon nanotubes (MWCNTs) and other low molecular weight were functionalized with an alkyne group via an urethane bond in an attempt to attach to various azide-functionalized silanes, including polyhedral oligomeric silesquioxane (POSS), via the Cu (I)-catalysed [3+2] Huisgen cycloaddition “click” reaction. FTIR spectroscopy and NMR analysis were utilized to follow the introduction of the alkyne-and azide-groups onto their respective particles, as well as their consumption in the final POSS-MWCNT nanohybrid product. This approach provides a simple and convenient route to effectively functionalize not just silanes and POSS, but also a wide variety of nanoparticles, onto the surface of CNTs.","PeriodicalId":331662,"journal":{"name":"Polymer Sciences","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122755784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36648/2471-9935.5.1.42
Jafar Torfifard, Erfan Norian, Ramin Ahmadi, M. Ahmadi, R. Ismail
In this paper, a new electrospinning device is designed and fabricated based on the pulsed system. The general model of electrospinning process is represented. Moreover, the produced nanofibers are characterized by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR). The effects of concentration and voltage depended on the collector rotation are investigated on the electrospinning process. The three different polystyrene solutions with the three various voltages are used to produce several polymer nanofibers. The experimental results reveal that the increase in polymer concentration enlarges the thickness of nanofiber while increase in applied voltage causes to decrease the nanofiber thickness. The results are compared with similar research. For our research, we applied the 10 KV voltage instead of 20 KV voltage as indicated in the literature. The measured results show that the proposed model has good adjacency with respect to analytical and experimental data.
{"title":"Polymer Concentration Effect on Nanofiber Growth Using Pulsed Electrospinning","authors":"Jafar Torfifard, Erfan Norian, Ramin Ahmadi, M. Ahmadi, R. Ismail","doi":"10.36648/2471-9935.5.1.42","DOIUrl":"https://doi.org/10.36648/2471-9935.5.1.42","url":null,"abstract":"In this paper, a new electrospinning device is designed and fabricated based on the pulsed system. The general model of electrospinning process is represented. Moreover, the produced nanofibers are characterized by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR). The effects of concentration and voltage depended on the collector rotation are investigated on the electrospinning process. The three different polystyrene solutions with the three various voltages are used to produce several polymer nanofibers. The experimental results reveal that the increase in polymer concentration enlarges the thickness of nanofiber while increase in applied voltage causes to decrease the nanofiber thickness. The results are compared with similar research. For our research, we applied the 10 KV voltage instead of 20 KV voltage as indicated in the literature. The measured results show that the proposed model has good adjacency with respect to analytical and experimental data.","PeriodicalId":331662,"journal":{"name":"Polymer Sciences","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128837264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36648/2471-9935.5.1.44
Nilay Kahya
Recently, numerous scientific articles related to water soluble chitosan (WSC) have been released. Since the solubility of chitosan is restricted to acidic media, and there is an increasing demand against to the derivative of the chitosan polymer, which is mainly to obtain a material both having solubility in aqueous media and also being chitosan property. One of the benefits of synthesis of water soluble chitosan is to obtain a water soluble polymer is easily miscible with a variety of compounds in aqueous solutions. In this review, water soluble chitosan derivatives are principally examined in terms of their biological and other applications. Biological activities of WSC derivatives are analyzed in the sense of antioxidant, antimicrobial and anticancer activity, respectively. Thereby, the collected data may be useful to compare novel synthesized water soluble chitosan derivatives with alternative structures.
{"title":"Water Soluble Chitosan Derivatives and their Biological Activities: A Review","authors":"Nilay Kahya","doi":"10.36648/2471-9935.5.1.44","DOIUrl":"https://doi.org/10.36648/2471-9935.5.1.44","url":null,"abstract":"Recently, numerous scientific articles related to water soluble chitosan (WSC) have been released. Since the solubility of chitosan is restricted to acidic media, and there is an increasing demand against to the derivative of the chitosan polymer, which is mainly to obtain a material both having solubility in aqueous media and also being chitosan property. One of the benefits of synthesis of water soluble chitosan is to obtain a water soluble polymer is easily miscible with a variety of compounds in aqueous solutions. In this review, water soluble chitosan derivatives are principally examined in terms of their biological and other applications. Biological activities of WSC derivatives are analyzed in the sense of antioxidant, antimicrobial and anticancer activity, respectively. Thereby, the collected data may be useful to compare novel synthesized water soluble chitosan derivatives with alternative structures.","PeriodicalId":331662,"journal":{"name":"Polymer Sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131434056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.36648/2471-9935.5.1.43
Dan Wang, Sam S. Sun
A series of polymer/dye composite pairs, where the same polymer Poly (3-hexylthiophene2,5-diyl) or P3HT paired with a series of three molecular dyes [Meso-Tetra(4-carboxyphenyl) porphine (TCPP), Ferriprotoporphyrin IX chloride (Hemin), and Protoporphyrin IX (Proto)] of different frontier orbitals and absorption coefficients are systematically investigated for potential optoelectronic conversion applications. A facile method to distinguish the charge and energy transfer contributions between emissive P3HT and dyes under certain conditions via concentration dependent photoluminescence (PL) is described. The experimental results from this study also revealed that the optoelectronic energy conversion efi¬ciencies of the P3HT/dye based OE devices appear to be affected more critically by the P3HT/dye pair PL quenching than the optical absorption coefi¬cients of the dyes, and that there appears to exist an optimal LUMO offset of P3HT/dye pair for most severe PL quenching or the best optoelectronic conversion efficiency. These study could be very useful for the design and development of next generation high efi¬ciency soft materials based optoelectronic devices such as solar cells and photodetectors.
{"title":"Optoelectronic Properties of a Series of P3HT/ Dye Pairs","authors":"Dan Wang, Sam S. Sun","doi":"10.36648/2471-9935.5.1.43","DOIUrl":"https://doi.org/10.36648/2471-9935.5.1.43","url":null,"abstract":"A series of polymer/dye composite pairs, where the same polymer Poly (3-hexylthiophene2,5-diyl) or P3HT paired with a series of three molecular dyes [Meso-Tetra(4-carboxyphenyl) porphine (TCPP), Ferriprotoporphyrin IX chloride (Hemin), and Protoporphyrin IX (Proto)] of different frontier orbitals and absorption coefficients are systematically investigated for potential optoelectronic conversion applications. A facile method to distinguish the charge and energy transfer contributions between emissive P3HT and dyes under certain conditions via concentration dependent photoluminescence (PL) is described. The experimental results from this study also revealed that the optoelectronic energy conversion efi¬ciencies of the P3HT/dye based OE devices appear to be affected more critically by the P3HT/dye pair PL quenching than the optical absorption coefi¬cients of the dyes, and that there appears to exist an optimal LUMO offset of P3HT/dye pair for most severe PL quenching or the best optoelectronic conversion efficiency. These study could be very useful for the design and development of next generation high efi¬ciency soft materials based optoelectronic devices such as solar cells and photodetectors.","PeriodicalId":331662,"journal":{"name":"Polymer Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129741033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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