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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 34 , No. 2

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[ Special Issue : Application of Sensor Technology in Polymer Processing ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33, No. 5, pp. 262-267
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Oct 2024
Received 08 Sep 2024 Revised 27 Sep 2024 Accepted 02 Oct 2024
DOI: https://doi.org/10.7735/ksmte.2024.33.5.262
현장 중합을 통한 열가소성 수지(PLCL(Poly L–Lactide co ε–Caprolactone)) 기반 Macro Fiber Composite Sensor 제작
김선주^a ; 이시맥^b ; 권태준^b ; 강병수^c ; 박재현^c^{, } ; 유형민^a^{, }



Fabrication of Thermoplastic Resin (PLCL (Poly L-Lactide co ε-Caprolactone)) Based Macro Fiber Composite Sensors Through In-Situ Polymerization
Seon-Ju Kim^a ; Simaek Lee^b ; Taejoon Kwon^b ; Byungsoo Kang^c ; Jaehyun Park^c^{, } ; Hyeongmin Yoo^a^{, }
aDepartment of Mechanical Engineering, Korea University of Education and Technology (KOREATECH)
bDevelopment Team, Rina Solution Corporation
cIndustrial Transformation Technology Department, Korea Institute of Industrial Technology (KITECH)
Correspondence to : ^a,Tel.: +82-41-560-1255 E-mail address: yhm2010@koreatech.ac.kr (Hyeongmin Yoo). Correspondence to : ^c,Tel.: +82-41-589-8286 E-mail address: jh8145@kitech.re.kr (Jaehyun Park). * These authors contributed equally to this work.



Funding Information ▼ Cheonan Institute of Science and Technology Platform Ministry of Education National Research Foundation of Korea 2021RIS-004

Abstract

In this study, a vacuum-assisted resin transfer molding system was designed to enhance the conventional fabrication process of m acro-fiber composites (MFC) by replacing non-recyclable epoxy with the biodegradable and eco-friendly thermoplastic resin, Poly L-Lactide co ε-Caprolactone (PLCL). The polymerized PLCL was analyzed for thermal properties using differential scanning calorimetry; the results indicated a crystallinity of 7.51%. The morphology of the polymer-impregnated macro-fibers was examined through scanning electron microscopy, confirming uniform fiber impregnation without the presence of voids. To assess sensor performance, a 5 V voltage was applied through a signal generator, and an oscilloscope was used for measurement. The sensitivity of the half-cut PZT MFC was observed to be greater compared to that of the thru-cut PZT MFC. Additionally, vibration tests verified that the fabricated MFC effectively functioned as a sensor.


Keywords: MFC(Macro Fiber Composite), In-Situ polymerization, PLCL(Poly L-Lactide co ε-Caprolactone), VA–RTM(Vacuum Assistant–Resin Transfer Molding)

Acknowledgments

본 연구는 천안과학산업진흥원의 지원(2023년도 실현기술개발사업, 유연 음향방출 센서를 활용한 가스 누출 스마트 감지 기술사업화)과 2024년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기반 지역혁신 사업(2021RIS-004)의 결과물입니다.

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Seon-Ju Kim

Master Course, Department of Mechanical Engineering, Korea University of Technology and Education (KOREATECH).Her research interest is the Development of Eco-Friendly Liquid Composite Processes.

E-mail: knj0004@koreatech.ac.kr

Simaek Lee

Director in the Development Team, Rina Solution Corporation.His research interest is Piezoelectric Fiber Composite.

E-mail: sm.lee@rinasolution.com

Taejoon Kwon

Researcher in the Development Team, Rina Solution Corporation.His research interest is Signal Processing and Data Science.

E-mail: ktjoon99@rinasolution.com

Byungsoo Kang

Technician at Industrial Transformation Technology Department, Korea institute of Industrial Technology (KITECH).His research interest is CFRP Manufacturing.

E-mail: bskang0721@kitech.re.kr

Jaehyun Park

Senior Researcher at Industrial Transformation Technology Department, Korea institute of Industrial Technology (KITECH).His research interests include Precision Engineering, Piezo-flexure Stage and Semiconductor Equipment.

E-mail: jh8145@kitech.re.kr

Hyeongmin Yoo

Associate Professor at Korea University of Technology and Education (KOREATECH). His research interests include PolymerProcessing, Composites Manufacturing and Functional Composite Sensors.

E-mail: yhm2010@koreatech.ac.kr