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Fabrication of surface modified PVA-Silica electrospun mat and its antibacterial activity : 표면 처리된 폴리비닐알코올/실리카 전기방사 매트의 제조와 항균 특성

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dc.contributor.advisor장정식-
dc.contributor.author박준기-
dc.date.accessioned2017-07-19T06:00:47Z-
dc.date.available2017-07-19T06:00:47Z-
dc.date.issued2013-08-
dc.identifier.other000000012972-
dc.identifier.urihttps://hdl.handle.net/10371/129468-
dc.description학위논문 (석사)-- 서울대학교 대학원 : 화학생물공학부(에너지환경 화학융합기술전공), 2013. 8. 장정식.-
dc.description.abstract졸-겔 방법에 따라 폴리비닐알코올과 실리카 간의 가교를 이룬 용액을 전기방사를 통해 매트 형태로 제조하고 실란의 종류에 따라 표면을 개질 하여 항균성 표면에 응용하였다. 친수성 매트의 표면은 실란의 알킬기의 도입에 따라 소수성으로 개질되었으며, 더불어 4차 아민을 지닌 실란이 처리된 표면에서는 질소의 양성 전하를 확인 할 수 있었다. 그람 음성인 대장균, 그람 양성인 황색포도상구균과 매트와의 표면 접촉, 시간 그리고 반복 실험을 진행 함으로써 항균성과 내구성을 확인하였다. 이와 같이 제조된 4차 아민-폴리비닐알코올/실리카 전기방사 매트는 150분 동안 균과의 접촉 에서 99.9%이상의 우수한 항균성을 확인하였으며, 반복실험에서도 99%이상의 성능을 유지하는 것을 확인 할 수 있었다-
dc.description.abstractThe fabrication of surface modified antibacterial electrospun mat is a promising material for enhanced antibacterial performance. In this study, PVA-Silica (P-S) electrospun mat was fabricated via sol-gel electrospinning and quaternary ammonium silane (QAS) and octadecyltrimethoxy silane (ODS) were applied for the modification of electrospun mat. The chemical bonding and surface elements that fabricated material was represented through analysis of the EDS and IR, and properties of the modified surface was able to be confirmed by contact angle measurements via water droplets. The surface of ODS modified electrospun mat showed hydrophobic characteristics and QAS modified P-S represented not only hydrophobic property but also positive charge. The antibacterial performance was evaluated using the kinetic test method. Interestingly, the contact time after 150min, gram-negative (E. coli) and gram-positive bacteria (S. aureus) were shown to be killed by charge-charge interaction with the surface of QAS-P-S electrospun mat. Moreover, the mat maintained the antibacterial performance of more than 99% during recycling. It is expected to be applicable in various fields using antibacterial activity of high-durability, such as membrane, filter, and medical device.-
dc.description.tableofcontentsContents

Chapter 1. Introduction 1
1.1 Antibactrial field 1
1.2 Antibacterial nanomaterials 2
1.3 Synthesis of antibacterial nanomaterials 3
1.4 Synthetic method of antibacterial nanomaterials using electrospinning and surface modification 5
1.5 Objective of this study 8

Chapter 2. Experimental 9
2.1 Materials 9
2.2 Preparation of PVA-Silica gel solution 9
2.3 Preparation of electrospun mat 10
2.4 Surface Modification of PVA-Silica electrospun mat 11
2.5 Antibactrial test of modified PVA-Silica electrospun mats 11
2.6 Characterization 12

Chapter 3. Results and discussion 14
3.1 Fabrication of QAS-PVA-Silica electrospun mat 14
3.1.1 Synthetic process of QAS-PVA-Silica electrospun mat 14
3.1.2 SEM images of PVA-Silica electrospun mats with different concentration ratio 17
3.1.3 SEM images of PVA, PVA-Silica and silane modified PVA-Silica electrospun mats 20
3.2 Characterization of QAS-PVA-Silica electrospun mat 23
3.2.1 Surface energy analysis of silane modified PVA-Silica electrospun mats 23
3.2.2 FT-IR and EDS analysis of silane modified electrospun mats 27
3.2.3 Thermal analysis of silane modified electrospun mats 32
3.3 Application of QAS-PVA-Silica electrospun mats for antibacterial performance 34

Chapter 4. Conclusion 42

References 44

Abstract 52
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dc.formatapplication/pdf-
dc.format.extent1204099 bytes-
dc.format.mediumapplication/pdf-
dc.language.isoen-
dc.publisher서울대학교 대학원-
dc.subjectPVA-
dc.subjectSilica-
dc.subjectSol-gel-
dc.subjectElectrospinning-
dc.subjectSilane-
dc.subjectAntibacterial-
dc.subject.ddc660-
dc.titleFabrication of surface modified PVA-Silica electrospun mat and its antibacterial activity-
dc.title.alternative표면 처리된 폴리비닐알코올/실리카 전기방사 매트의 제조와 항균 특성-
dc.typeThesis-
dc.description.degreeMaster-
dc.citation.pages52-
dc.contributor.affiliation공과대학 화학생물공학부(에너지환경 화학융합기술전공)-
dc.date.awarded2013-08-
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