STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES

STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES

Bibliographic Details
Main Author: Sun, Mingze
Language:English
Published: Case Western Reserve University School of Graduate Studies / OhioLINK 2018
Subjects:
Plastics
Polymers
Polymer
Structure-property relations
Multilayer films
Aerogels
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=case1512489068284179
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-case15124890682841792021-08-03T07:04:56Z STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES Sun, Mingze Plastics Polymers Polymer Structure-property relations Multilayer films Aerogels Materials with layered structures are of increased importance in current the disciplines of solid state chemistry, physics and engineering, due to their integration of single layers and flexibility in design and process. Many current technologies utilize layered materials to realize functions, such as barrier and layered multifunctional foam-like films. Two such classes of layered materials are studied in this present work: multilayered polymer barrier films and layered clay aerogel composites.Multilayered barrier filmsA polymer-based multilayer film system and related modified versions have prepared in this part of the thesis. These materials were designed with superior barrier properties, and can be used for encapsulation of organic photovoltaic (PV) devices. Such encapsulation is important because the active elements of the PV devices are easy to degrade and lose function when exposed to oxygen and water vapor. In addition to barrier properties, integrated with flexible organic PV devices have the requirements of flexibility and transparency. Multilayered films with “inorganic-organic” external coatings exhibit superior barrier properties as well as stable mechanical performance and 90+% transparency to the UV-vis spectrum. Applying those barrier films over the organic solar cells can elongate the shelf time of devices from several days to 3 months or more.Aerogel composite systemsClay/PVOH aerogels fabricated via freeze-drying, are ultra-low density and foam-like materials. Reinforcement by keratin-fibers can further improve their mechanical performance as well as insulation properties, not only from adding materials, but also from inner morphology change which can be observed through SEM and µCT. Those structural changes which make an impact on properties come from processing condition changes. A study has been conducted to determine the relationship between rheological properties of gels under different processing conditions and the performance of the final aerogel products made from those gels. A link, correlating rheology with final properties, may make it possible to predict aerogels’ performance before freeze drying. 2018-02-02 English text Case Western Reserve University School of Graduate Studies / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=case1512489068284179 http://rave.ohiolink.edu/etdc/view?acc_num=case1512489068284179 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Plastics
Polymers
Polymer
Structure-property relations
Multilayer films
Aerogels
spellingShingle Plastics
Polymers
Polymer
Structure-property relations
Multilayer films
Aerogels
Sun, Mingze
STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES
author Sun, Mingze
author_facet Sun, Mingze
author_sort Sun, Mingze
title STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES
title_short STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES
title_full STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES
title_fullStr STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES
title_full_unstemmed STRUCTURE, PROPERTIES AND APPLICATIONS OF LAYERED MATERIALS:MULTILAYERED FILMS AND AEROGEL COMPOSITES
title_sort structure, properties and applications of layered materials:multilayered films and aerogel composites
publisher Case Western Reserve University School of Graduate Studies / OhioLINK
publishDate 2018
url http://rave.ohiolink.edu/etdc/view?acc_num=case1512489068284179
work_keys_str_mv AT sunmingze structurepropertiesandapplicationsoflayeredmaterialsmultilayeredfilmsandaerogelcomposites
_version_ 1719453024886194176

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