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Processing Approaches to Realize Electrically Conductive Surface-Localized Nanocomposites
Processing Approaches to Realize Electrically Conductive Surface-Localized Nanocomposites
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105329
- ISBN
- 9798263324858
- DDC
- 363.25
- 저자명
- Ryan, Emily A.
- 서명/저자
- Processing Approaches to Realize Electrically Conductive Surface-Localized Nanocomposites
- 발행사항
- [Sl] : Georgia Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 290 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
- 주기사항
- Advisor: Shofner, Meisha L.;Reynolds, John R.
- 학위논문주기
- Thesis (Ph.D.)--Georgia Institute of Technology, 2025.
- 초록/해제
- 요약The development of physically robust, environmentally stable, electrically conductive polymer films is critical for a wide range of future space exploration applications, including inflatable habitats and flexible robotics. In this work, melt infiltration was explored as a method to produce polymer films with integrated, thick, and durable surface-localized nanocomposite (SLNC) coatings with nanoparticle loadings well beyond the percolation threshold. A generalized method for identifying melt infiltration temperatures in semicrystalline substrates, based on their melting regime, was developed. This approach was used to produce electrically conductive SLNCs from reduced graphene oxide (rGO) nanoparticles and a variety of semi-crystalline polymer substrates. By varying the infiltration temperature within the melt regime controllable levels of infiltration and related surface roughness and porosity were demonstrated. Thermal analysis modeling of the infiltration procedure also revealed that infiltration proceeded through mixed solid-liquid flow due to the partially melted state of the infiltrating matrix in contrast to the fully liquid infiltration observed in amorphous polymer systems.To investigate the influence of particle chemistry on infiltration dynamics and SLNC properties, a post-reduction method was developed to synthesize fluoro-alkyl functionalization of rGO (rGO-f). Despite a low degree of functionalization (~0.1 at.% F), rGO-f exhibited significant changes in surface energy and dispersion behavior, compared to unfunctionalized rGO, while maintaining a high level of conductivity. The infiltration behavior was compared across rGO-f, unfunctionalized rGO, and a previously developed alkyl functionalized rGO (rGO-dd). Functionalization had a minimal impact on infiltration progression or SLNC conductivity. Mechanical reinforcement of the SLNCs was found to depend on compatibility between the rGO functionality and the infiltrating matrix with rGO-dd/polyethylene SLNCs showing higher reinforcement (140% increase in modulus), than rGO-f/polyethylene SLNCs (64% increase).The piezoresistive behavior of fully infiltrated SLNCs was characterized under quasi-static and cyclic tension to understand the origin of piezoresistivity in these SLNCs. Creep-driven network reconfiguration governed the low-strain response, while crack formation dominated at higher strains. To assess durability in potential wear conditions, the conductivity of SLNCs was track during film bending and abrasion with lunar dust simulant. Fully infiltrated SLNCs maintained sufficient conductivity at 1000 cycles of lunar simulant abrasion and at sharp bend radii, indicating robustness to mechanical deformation and wear.Finally, SLNCs were integrated into a planar electrodynamic dust shield (EDS) architecture by adapting the particle deposition and infiltration process to produce patterned devices. These EDS devices effectively removed lunar dust simulant in high vacuum conditions. Altogether, this work established a generalized processing approach for SLNCs in semi-crystalline materials and demonstrated key attributes for their use as multifunctional surface coatings in space-relevant environments.
- 일반주제명
- Investigations
- 일반주제명
- Nanocomposites
- 일반주제명
- Nanoparticles
- 일반주제명
- Dust
- 일반주제명
- Polymer films
- 일반주제명
- Fluorides
- 일반주제명
- Cracks
- 일반주제명
- Graphene
- 일반주제명
- Contact angle
- 일반주제명
- Composite materials
- 일반주제명
- Nanotubes
- 일반주제명
- Polymers
- 일반주제명
- Polyethylene
- 일반주제명
- Space exploration
- 일반주제명
- Fourier transforms
- 일반주제명
- Solvents
- 일반주제명
- Microscopy
- 일반주제명
- Electrostatic discharges
- 일반주제명
- Aerospace engineering
- 일반주제명
- Industrial engineering
- 일반주제명
- Materials science
- 일반주제명
- Mathematics
- 일반주제명
- Nanotechnology
- 일반주제명
- Polymer chemistry
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105329
■006m o d
■007cr#unu||||||||
■020 ▼a9798263324858
■035 ▼a(MiAaPQ)AAI32307928
■035 ▼a(MiAaPQ)GeorgiaTech78713
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a363.25
■1001 ▼aRyan, Emily A.
■24510▼aProcessing Approaches to Realize Electrically Conductive Surface-Localized Nanocomposites
■260 ▼a[Sl]▼bGeorgia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a290 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-05, Section: B.
■500 ▼aAdvisor: Shofner, Meisha L.;Reynolds, John R.
■5021 ▼aThesis (Ph.D.)--Georgia Institute of Technology, 2025.
■520 ▼aThe development of physically robust, environmentally stable, electrically conductive polymer films is critical for a wide range of future space exploration applications, including inflatable habitats and flexible robotics. In this work, melt infiltration was explored as a method to produce polymer films with integrated, thick, and durable surface-localized nanocomposite (SLNC) coatings with nanoparticle loadings well beyond the percolation threshold. A generalized method for identifying melt infiltration temperatures in semicrystalline substrates, based on their melting regime, was developed. This approach was used to produce electrically conductive SLNCs from reduced graphene oxide (rGO) nanoparticles and a variety of semi-crystalline polymer substrates. By varying the infiltration temperature within the melt regime controllable levels of infiltration and related surface roughness and porosity were demonstrated. Thermal analysis modeling of the infiltration procedure also revealed that infiltration proceeded through mixed solid-liquid flow due to the partially melted state of the infiltrating matrix in contrast to the fully liquid infiltration observed in amorphous polymer systems.To investigate the influence of particle chemistry on infiltration dynamics and SLNC properties, a post-reduction method was developed to synthesize fluoro-alkyl functionalization of rGO (rGO-f). Despite a low degree of functionalization (~0.1 at.% F), rGO-f exhibited significant changes in surface energy and dispersion behavior, compared to unfunctionalized rGO, while maintaining a high level of conductivity. The infiltration behavior was compared across rGO-f, unfunctionalized rGO, and a previously developed alkyl functionalized rGO (rGO-dd). Functionalization had a minimal impact on infiltration progression or SLNC conductivity. Mechanical reinforcement of the SLNCs was found to depend on compatibility between the rGO functionality and the infiltrating matrix with rGO-dd/polyethylene SLNCs showing higher reinforcement (140% increase in modulus), than rGO-f/polyethylene SLNCs (64% increase).The piezoresistive behavior of fully infiltrated SLNCs was characterized under quasi-static and cyclic tension to understand the origin of piezoresistivity in these SLNCs. Creep-driven network reconfiguration governed the low-strain response, while crack formation dominated at higher strains. To assess durability in potential wear conditions, the conductivity of SLNCs was track during film bending and abrasion with lunar dust simulant. Fully infiltrated SLNCs maintained sufficient conductivity at 1000 cycles of lunar simulant abrasion and at sharp bend radii, indicating robustness to mechanical deformation and wear.Finally, SLNCs were integrated into a planar electrodynamic dust shield (EDS) architecture by adapting the particle deposition and infiltration process to produce patterned devices. These EDS devices effectively removed lunar dust simulant in high vacuum conditions. Altogether, this work established a generalized processing approach for SLNCs in semi-crystalline materials and demonstrated key attributes for their use as multifunctional surface coatings in space-relevant environments.
■590 ▼aSchool code: 0078.
■650 4▼aInvestigations
■650 4▼aNanocomposites
■650 4▼aNanoparticles
■650 4▼aDust
■650 4▼aPolymer films
■650 4▼aFluorides
■650 4▼aCracks
■650 4▼aGraphene
■650 4▼aContact angle
■650 4▼aComposite materials
■650 4▼aNanotubes
■650 4▼aPolymers
■650 4▼aPolyethylene
■650 4▼aSpace exploration
■650 4▼aFourier transforms
■650 4▼aSolvents
■650 4▼aComputer aided design--CAD
■650 4▼aMicroscopy
■650 4▼aChemical vapor deposition
■650 4▼aHigh density polyethylenes
■650 4▼aElectrostatic discharges
■650 4▼aAerospace engineering
■650 4▼aIndustrial engineering
■650 4▼aMaterials science
■650 4▼aMathematics
■650 4▼aNanotechnology
■650 4▼aPolymer chemistry
■690 ▼a0538
■690 ▼a0546
■690 ▼a0794
■690 ▼a0405
■690 ▼a0652
■690 ▼a0495
■71020▼aGeorgia Institute of Technology.
■7730 ▼tDissertations Abstracts International▼g87-05B.
■790 ▼a0078
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360258▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


