Archana Nigrawal, N. Chand, Arun Kumar Sharma, F. Haque
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SEM micro graphs depicts that produced nano fibres are homogenous in nature and there were no apparent gap between the PVA and PEG nano fibre. It may be explained that due to the high electric potential developed during the electro spinning process which helped the nano fibres to get stretched XRD patterns exhibited the crystal size increased on adding PEG in the PVA gel. Effect of PEG addition on Tm of PVA nano fibres has been determined by running their DSC scans. An additional peak of 158.13°C is observed for the sample having 0.4 g PEG. 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引用次数: 0
摘要
聚乙烯醇(PVA)在过滤、生物医学和制药领域已经建立了信誉。本文在聚乙烯醇中加入不同浓度的聚乙二醇,制备凝胶及其纳米纤维。与PVA类似,PEG是水溶性的,可以形成均匀的凝胶,在PVA中加入PEG可以实现很强的分子间键合。采用高wt %的聚乙二醇负载聚乙烯醇纳米纤维制备纤维。纳米纤维垫有0,0.2,0.4和0.6克低分子量的聚乙二醇被添加到8.6吨。采用静电纺丝技术制备% PVA溶液和纤维。用SEM、XRD和DSC对制备的纳米纤维进行了表征。SEM结果表明,聚乙二醇浓度的增加使纳米纤维分离,网孔间距增大。SEM显微图显示,制备的纳米纤维性质均匀,PVA和PEG纳米纤维之间没有明显的间隙。这可能是由于静电纺丝过程中产生的高电位有助于纳米纤维的拉伸,XRD图显示,在PVA凝胶中加入PEG后,纳米纤维的晶粒尺寸增大。通过DSC扫描确定了聚乙二醇对PVA纳米纤维Tm的影响。对于含有0.4 g PEG的样品,观察到158.13°C的附加峰。由于加入PVA纳米纤维的PEG晶粒尺寸增大,熔融温度从215℃升高到219℃。
Structure and thermal behaviour of different concentration PEG loaded PVA nanofibers
Poly vinyl alcohol (PVA) has established its credibility in the fields of filtration, biomedical and pharmaceutical areas. In this paper different concentration of poly (ethylene) glycol were added to PVA to prepare gel and its nano fibres. PEG is water soluble similar to PVA can give a uniform gel and a strong intermolecular bonding can be achieved by the addition of PEG in PVA. Fibres were prepared by having high wt.% of PEG loaded PVA nano fibres. Nano fibre mat having 0, 0.2,0.4 and 0.6 g PEG having low molecular weight was added in the 8.6 wt.% PVA solution and then fibres were prepared by using electro spinning technique. Nano fibres so prepared were characterised by SEM, XRD and DSC. SEM results reveal that increase of PEG concentration separated the nano fibres and increased the gap of the mesh size. SEM micro graphs depicts that produced nano fibres are homogenous in nature and there were no apparent gap between the PVA and PEG nano fibre. It may be explained that due to the high electric potential developed during the electro spinning process which helped the nano fibres to get stretched XRD patterns exhibited the crystal size increased on adding PEG in the PVA gel. Effect of PEG addition on Tm of PVA nano fibres has been determined by running their DSC scans. An additional peak of 158.13°C is observed for the sample having 0.4 g PEG. Melting temperature shifted from 215° C to 219°C due to increase in crystal size of PEG added PVA nano fibres.
期刊介绍:
Proceedings of the Institution of Mechanical Engineers Part N-Journal of Nanomaterials Nanoengineering and Nanosystems is a peer-reviewed scientific journal published since 2004 by SAGE Publications on behalf of the Institution of Mechanical Engineers. The journal focuses on research in the field of nanoengineering, nanoscience and nanotechnology and aims to publish high quality academic papers in this field. In addition, the journal is indexed in several reputable academic databases and abstracting services, including Scopus, Compendex, and CSA's Advanced Polymers Abstracts, Composites Industry Abstracts, and Earthquake Engineering Abstracts.