PUKYONG

Designing Highly-Stretchable and Conductive PVA/Xanthan Gum Based Hydrogels for Energy Harvesting and Wireless Sensing Applications

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Alternative Title
에너지 수확 및 무선 감지 애플리케이션을 위한 고도로 신축성 있고 전도성이 높은 Polyvinyl Alcohol/Xanthan Gum 기반 하이드로젤 설계
Abstract
Developing materials for energy harvesting and sensing requires balancing transparency, flexibility, biocompatibility, self-healing, and biodegradability—properties that conventional materials often lack. Ion-conductive hydrogels, with biomimetic structures and tunable mechanics, offer a promising alternative. This study introduces a novel hydrogel made from biocompatible polyvinyl alcohol (PVA) and xanthan gum (XG), synthesized via dual cross-linking—chemical cross-linking with glutaraldehyde and physical cross-linking through freeze-thawing—to achieve both flexibility and mechanical strength. A sodium persulfate (Na₂S₂O₈) post-treatment boosts its electrical conductivity without compromising structural integrity. The resulting hydrogel combines mechanical strength, flexibility, and conductivity, ideal for wearable devices in energy harvesting and sensing. Its capacity to generate electricity from seawater osmotic energy, leveraging ionic gradients, positions it as an innovative solution for marine renewable energy. Furthermore, its wireless sensor compatibility enables real-time data transmission, making it highly useful in remote or challenging environments. This multifunctional hydrogel, from osmotic energy harvesting to flexible sensing, is a leading material for eco-friendly, next-generation smart devices.
Keywords : PVA, Xanthan Gum, Hydrogel, Energy Harvesting, Wireless Sensor|이 연구에서는 투명성, 유연성, 생체 적합성, 자가 치유, 생분해성 등 다양한 특성의 균형이 필요한 에너지 수확 및 감지 기술을 위한 새로운 이온 전도성 하이드로젤을 제안합니다. Poly Vinyl Alcohol (PVA)과 Xanthan Gum (XG)으로 구성된 이 하이드로젤은 생체 모방 구조와 조정 가능한 기계적 특성을 가지며, 글루타르알데히드와의 화학적 가교 및 동결-해동에 의한 물리적 가교를 통해 유연성과 강도를 동시에 달성합니다. Sodium Persulfate (Na₂S₂O₈)로 후처리하여 전도성을 향상시키며, 바닷물의 삼투압 에너지를 이용해 전기를 생산하고 이온 구배를 통한 에너지 수확이 가능해 해양 재생 에너지에 적합한 혁신적 솔루션을 제공합니다. 무선 센서와의 호환성 덕분에 외딴 환경이나 혹독한 조건에서도 실시간 데이터 전송이 가능하여 웨어러블 기기용 감지 소재로서 이상적입니다.
키워드 : PVA, 잔탄 검, 하이드로겔, 에너지 하베스팅, 무선 센서
Author(s)
NISA AQILLA ELLENAHAYA ENTIFAR
Issued Date
2025
Awarded Date
2025-02
Type
Dissertation
Keyword
PVA, Xanthan Gum, Hydrogel, Energy Harvesting, Wireless Sensor
Publisher
국립부경대학교 대학원
URI
https://repository.pknu.ac.kr:8443/handle/2021.oak/33956
http://pknu.dcollection.net/common/orgView/200000864615
Affiliation
국립부경대학교 대학원
Department
대학원 스마트그린기술융합공학과
Advisor
Kim Yong Hyun
Table Of Contents
I. Introduction 1
II. Theoretical Basis 4
2.1 Hydrogels 4
2.1.1 Hydrogel Classification Based on Material Source 5
2.1.2 Hydrogel Classification Based on Cross-linking Method 8
2.2 Polyvinyl Alcohol (PVA) 10
2.3 Xanthan Gum (XG) 12
2.4 Interpenetrating Polymer Networks (IPNs) Hydrogel 14
2.5 Ionic Conductive Hydrogel 16
2.6 Ionic Conductive Hydrogel as Wireless Strain Sensor 18
2.7 Ionic Conductive Hydrogel as Osmotic Energy Harvesting 21
III. Experimental Section 24
3.1 Materials 24
3.2 Synthesis of PVA/XG Hydrogel 24
3.3 Synthesis PVA/XG Ionic Hydrogel 25
IV. Result and Discussion 27
4.1 Hydrogel Tensile Properties 27
4.1.1 Poly Vinyl Alcohol Optimization 29
4.1.2 Xanthan Gum Optimization 31
4.1.3 Glutaraldehyde Optimization 33
4.1.4 Sodium Persulfate Optimization 35
4.2 Hydrogel Ionic Conductivity 37
4.3 Hydrogel Mechanical Performance 39
4.4 PVA/XG Hydrogel Electrical Performance 43
4.5 PVA/XG Hydrogel Lamp Test 47
4.6 PVA/XG Hydrogel Swelling & Weight Loss Properties 48
4.7 PVA/XG Hydrogel Characterization 50
4.7.1 SEM 50
4.7.2 FTIR Spectroscopy 51
4.7.3 Raman Spectroscopy 54
4.8 PVA/XG Application 56
4.8.1 Wireless Sensor 56
4.8.2 Osmotic Energy Harvesting 57
V. Conclusion 61
References 63
Acknowledgements 80
Degree
Master
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대학원 > 스마트그린기술융합공학과
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