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035 _a.b12444303
099 9 _aAIT Thesis no.ISE-23-06
100 1 _aSakaerwan Piwsoi
245 1 0 _aPreparation of electrically conductive PDMS/cellulose nanofibrils/carbon nanotubes-reinforced silicone elastomer
260 _aPathum Thani :
_bAsian Institute of Technology,
_c2023
300 _a87 leaves :
_bill.+
_e 1 online resource
490 1 _aThesis ;
_vno. ISE-23-06
502 _aThesis (M. Eng.) - Asian Institute of Technology, 2023
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Bio-Nano Material Science and Engineering, School of Engineering and Technology
520 _aElectrically conducting and flexible materials have received tremendous interest recently in many areas, such as intelligent robots, lightweight mobile electronics, biomedical applications, and wearable devices, as they can provide new device functionalities and reduce application complexities. Polydimethylsiloxane (PDMS) is a biocompatible and flexible material suitable for such flexible applications. However, PDMS is electrically insulating in nature. Thus, the goal of this research is to increase the electrical conductivity of PDMS by incorporating multiwall carbon nanotubes (MWCNTs) into the PDMS matrix. Cellulose nanofibers (CNFs) were added into the mixture as a dispersing agent to improve the dispersion of the CNTs in PDMS enhancing the electrical properties of the nanocomposite. In addition, four silane coupling agents, namely (3-Aminopropyl)triethoxysilane (APTES), phenyltrimethox ysilane, n-Propyltriethoxy-silane, and triethoxy(octyl)silane, were utilized to functionalize the surface of cellulose nanofibers, which enhance the compatibility of hydrophilic CNF with the hydrophobic PDMS polymer matrix. CNFs and silane modified CNFs were mixed at different quantities in the PDMS/MWCNT composite and flexible PDMS/CNF/CNT films were prepared. The developed PDMS/CNF/CNT and PDMS/modified-CNF/CNT nanocomposite films were characterized for their electrical, mechanical, chemical, morphological, and surface-wetting properties. Their electrical and mechanical stability against pH level was also studied during the research. Moreover, a relationship between the electric conductance and mechanical strain of the PDMS/CNF/CNT and PDMS/modified-CNFs/CNT nanocomposite was established to determine the mechanoelectrical properties of the nanocomposite. Overall, the results indicated that silane modified CNF has better dispersibility in the PDMS matrix and it also improves the dispersion of MWCNT in PDMS improving the electrical conductance of the PDMS/modified-CNFs/CNT nanocomposite films.
650 0 _aPolydimethylsiloxane
650 0 _aCellulose
650 0 _aNanostructured materials
700 1 _aBora, Tanujjal,
_eChairperson
700 1 _aRicco, Raffaele,
_eExamination Committee
700 0 _aSasitorn Srisawadi,
_eExamination Committee
710 2 _aBangchak Corporation Public Company Limited, Thailand,
_eScholarship Donor
710 2 _aAIT Scholarships,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. ISE-23-06
856 4 0 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B21823
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