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Dissertations / Theses on the topic 'The sol-gel process'

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Published: 28 May 2022

Last updated: 31 July 2025

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1

Leclerc, Brian. "Process optimization for sol-gel PZT films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ37962.pdf.

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2

Laurie, Joyce. "Freeze casting : a modified sol-gel process." Thesis, University of Bath, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260248.

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3

Reis, Flávia Valério Esteves dos [UNESP]. "Síntese e caracterização de nanoesferas de sílica monodispersas para obtenção de filmes." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/92066.

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Made available in DSpace on 2014-06-11T19:25:34Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-06-08Bitstream added on 2014-06-13T19:32:52Z : No. of bitstreams: 1 reis_fve_me_araiq.pdf: 3936353 bytes, checksum: f0ae31c006486b496b3c681a599a9d65 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Neste trabalho foram estudados métodos para síntese de nanoesferas de sílica com diâmetros entre 10 e 50 nm e com estreita distribuição de tamanho. A síntese das nanoesferas teve como base metodologias existentes na literatura que utilizam aminoácido como catalisado

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4

Joardar, Saikat Sutej. "Siloxane modified hybrid materials by the sol-gel process." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-07282008-134057/.

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5

Hasegawa, George. "Studies on Porous Monolithic Materials Prepared via Sol-Gel Process." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157811.

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6

Filho, Djalma de Albuquerque Barros. "Caracterização de filmes finos Sol-gel por elipsometria." Universidade de São Paulo, 1992. http://www.teses.usp.br/teses/disponiveis/54/54131/tde-19032009-090814/.

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Este trabalho experimental trata da caracterização de filmes sol-gel por elipsometria. A caracterização é um procedimento importante na determinação das propriedades físico-químicas de qualquer material como, por exemplo, filmes finos sol-gel. É possível produzir materiais de natureza diversa (vítreos, cerâmicos e cristalinos) pela técnica sol-gel. A elipsometria, por sua vez, é uma técnica recente na determinação do índice de refração complexo de um material. Os seus fundamentos teóricos tratam da natureza da luz polarizada e sua propagação através de um sistema ótico. No decorrer do trabalho

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7

Reis, Flávia Valério Esteves dos. "Síntese e caracterização de nanoesferas de sílica monodispersas para obtenção de filmes /." Araraquara : [s.n.], 2011. http://hdl.handle.net/11449/92066.

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Orientador: Sandra Helena Pulcinelli<br>Coorientador: Roberto Bertholdo<br>Banca: Karim Dahmouche<br>Banca: Aldo José Gorgatti Zarbin<br>Resumo: Neste trabalho foram estudados métodos para síntese de nanoesferas de sílica com diâmetros entre 10 e 50 nm e com estreita distribuição de tamanho. A síntese das nanoesferas teve como base metodologias existentes na literatura que utilizam aminoácido como catalisador, com o objetivo de se obter um maior controle do diâmetro final e da distribuição de tamanho. A caracterização das amostras foi realizada utilizando-se as técnicas de IV, RMN, BET, Potenc

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8

Santos, Fábio Cesar dos [UNESP]. "Desenvolvimento de sistemas multifuncionais baseados em híbridos orgânico-inorgânicos dopados." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110704.

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Made available in DSpace on 2014-11-10T11:09:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-03-19Bitstream added on 2014-11-10T11:58:20Z : No. of bitstreams: 1 000773511_20141201.pdf: 228963 bytes, checksum: cb639dfc8dea39229c7aba872b322f43 (MD5) Bitstreams deleted on 2014-12-02T13:27:28Z: 000773511_20141201.pdf,Bitstream added on 2014-12-02T13:28:00Z : No. of bitstreams: 1 000773511.pdf: 5812450 bytes, checksum: 0dbaa9f7c7c565f96e42b12b93f9a811 (MD5)<br>Revestimentos ambientalmente compatíveis híbridos orgânico-inorgânicos para proteção contra a corrosão de superfícies metálicas

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9

Silva, Cristiane Aparecida da. "Hibridos de acetato de celulose e polissiloxanos : preparação, propriedades e morfologia." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/248725.

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Orientador: Maria do Carmo Gonçalves<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-05T05:20:02Z (GMT). No. of bitstreams: 1 Silva_CristianeAparecidada_M.pdf: 2437144 bytes, checksum: 63196f11ed7768a6c3e232e446d45e21 (MD5) Previous issue date: 2005<br>Resumo: O tema central deste trabalho foi a preparação, a caracterização morfológica e a avaliação das propriedades físicas de híbridos de acetato de celulose e polissiloxanos utilizando o processo sol-gel. Inicialmente, foram sintetizadas unidades funcionais a partir d

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10

Póvoas, Pamela Luiza de Souza Tavares. "Nanopartículas de sílica da família SBAn: síntese, funcionalização, caracterização e efeito da morfologia na adsorção de lipase." CNEN - Centro de Desenvolvimento da Tecnologia Nuclear, Belo Horizonte, 2014. http://www.bdtd.cdtn.br//tde_busca/arquivo.php?codArquivo=314.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Materiais mesoporosos têm despertado um interesse cada vez maior na comunidade científica, devido à singularidade das suas propriedades, o que os tornam materiais promissores para serem empregados em processos de adsorção, catálise, nanotecnologia e aplicações eletrônicas. Dentre os diversos materiais da série de sílica mesoporosa, destaca-se a família SBAn. Os materiais SBA-16 e SBA-15 se sobressaem em diversos estudos devido às suas diferentes morfologias, tamanho de poros uniformes, elevada área superficial e elevada densidade

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11

Santos, Fábio Cesar dos. "Desenvolvimento de sistemas multifuncionais baseados em híbridos orgânico-inorgânicos dopados /." Araraquara, 2014. http://hdl.handle.net/11449/110704.

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Orientador: Peter Hammer<br>Co-orientador: Celso Valentim Santilli<br>Banca: Cecilio Sadao Fugivara<br>Banca: Karim Dahmouche<br>Resumo: Revestimentos ambientalmente compatíveis híbridos orgânico-inorgânicos para proteção contra a corrosão de superfícies metálicas são alternativas aos métodos baseados em passivação que utilizam cromatos. Neste contexto, revestimentos híbridos foram preparados utilizando o processo sol-gel a partir da polimerização radicalar entre o metacrilato de metila (MMA) e o 3- metacriloxipropriltrimetoxisilano (MPTS) seguido pela etapa de hidrólise e policondensação ácid

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12

Pouxviel, Jean-Claude. "Mecanisme de croissance et polymerisation sol-gel." Paris 6, 1987. http://www.theses.fr/1987PA066587.

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Etude de la polymerisation sol gel d'alcoolate((obu)::(2) al-o-si(oet)::(3)). L'analyse des spectres de rmn du silicium, relayee par des simulations numeriques mettent en evidence les effets de concentration des reactifs(eau, precurseur, alcool, acide) sur les cinetiques d'hydrolyse-condensation du tetraethoxysilane

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13

Montheil, Titouan. "Conception d’hydrogels hybrides pour la préparation de géloses synthétiques." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTS012.

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Des hydrogels hybrides ont été développés comme alternative aux hydrogels d’agar utilisés en microbiologie. Notre stratégie repose sur la fonctionnalisation de polymères avec des groupements triéthoxysilanes, puis leurs mises en jeu dans le procédé sol-gel afin de fabriquer un hydrogel hybride organique-inorganique. Ce procédé est bio-orthogonal et biocompatible. Il se déroule en milieu aqueux, à pH physiologique et température ambiante. Dans une première partie, nous avons développé des hydrogels à base de PEG bisilylé. Nous avons montré que l’incorporation de PEG monosilylé permettait un rel

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14

Silva, Raquel Gomes da Costa. "Preparo de fibras para microextração em fase solida (SPME) com recobrimentos a base de poliglicois." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250190.

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Orientador: Fabio Augusto<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-04T16:10:15Z (GMT). No. of bitstreams: 1 Silva_RaquelGomesdaCosta_M.pdf: 2725008 bytes, checksum: e8824bf816d759438897ef63e8688a9d (MD5) Previous issue date: 2005<br>Mestrado<br>Quimica Analitica<br>Mestre em Química

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15

Kim, Hyungkeun. "Process engineering of thick dielectric films by Chemically Bonded Composite Sol-Gel." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31084.

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This research explores new processing methods to decrease residual stress in ceramic films on metallic substrates, and thus to prevent large-scale cracking in the films. The system of particular concern is alumina-based ceramic coating on aluminum alloy, wherein coefficient of thermal expansion (CTE) of the ceramic is about 3x smaller than that of the alloy. The specific goal was to achieve relatively thick (~0.2mm) and substantially low density of cracks in dielectric films of alumina-based ceramic on aluminum alloy AA5052, by Chemically Bonded Composite Sol-Gel (CB-CSG) process. The principa

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16

Saito, Haruko. "Formation Process and Liquid Transport of Sol-gel Derived Monolithic Porous Silica." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/57273.

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17

McGiveron, James Kevin. "Aspects of sol-gel chemistry : the adsorption properties of silica sol-gel monoliths and the preparation of indium(III) oxide and indium(III)/tin(IV) oxide thin films by the inorganic sol-gel process." Thesis, Brunel University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294504.

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18

Silva, Rodrigo Ferreira. "Filmes de óxido de zinco dopado com alumínio ou európio: preparação e caracterização." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-01022002-114630/.

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O interesse na preparação de filmes finos de óxidos pelo processo sol-gel aumentou nos últimos anos devido a alta qualidade dos filmes, baixo custo dos precursores orgânicos e grande importância tecnológica. Dependendo das condições de preparação e das espécies dopantes, é possível obter filmes com características diversas: piezelétricos, luminescentes, isolantes, semicondutores ou condutores. Filmes de óxido de zinco (ZnO) podem ser usados na formação de camadas semicondutoras. Além disso, a dopagem deste composto com elementos da família IIIA promove um aumento da condutividade e a dopagem

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19

Barnardo, Twilight. "Time resolved anomalous small angle X-ray scattering of the sol-gel process." Thesis, Aberystwyth University, 2010. http://hdl.handle.net/2160/17191ae6-e038-4c50-b380-8f4d227791a8.

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This investigation employs Anomalous Small Angle X-ray Scattering (ASAXS), and further expands the technique for conducting time resolved experiments within synchrotron facilities. ASAXS utilises the absorption effects of a given element as photon energies approach an absorption edge, and is used to extract partial scattering functions of the individual species within a composite material. In situ ASAXS is used to explore and understand the complex reactions in sol gel processing. The gelation process for zirconia, yttria stabilised zirconia (YSZ), YSZ and zirconia in silica, and zinc-silica s

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20

Miyafuji, Hisashi. "Wood-Inorganic Composites with Fire-Resistance as Prepared by the Sol-Gel Process." Kyoto University, 2000. http://hdl.handle.net/2433/68743.

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21

Trofimov, A. O., E. V. Kolobkova, E. V. Sohovich, and V. S. Zemko. "Electrochromic Film Based on a-WO3 Obtained by Sol-gel." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35386.

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The influence of changes in the conditions of sol-gel method on the thermal characteristics and the structure electrochromic (EC) а-WO3 films. DSC data showed greater sensitivity of the structure to the pe-culiarities of the drying of the product poliperoxo-tungstic acid. The Films were transparent over a wide range (Eg  2,5 eV). All compositions were amorphous as measured by X-rays diffraction. Based on the IR and Raman spectroscopy dates was concluded the presence in the structure of amorphous transparent glassy semiconductor a-WO3 predominantly tetrahedral [WO4] groups. The precursor produ

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22

Tudela, Diego Renan Giglioti. "Estudo da luminescência de cristais de quartzo naturais e artificiais crescidos pelo método sol-gel." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-08032019-090623/.

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Este trabalho foi dividido em duas grandes partes principais, a primeira relacionada ao estudo da luminescência de quatro espécimes de quartzo naturais brasileiros (verde, hialino, rosa e azul) e a segunda trata da confecção e caracterização de amostras sintéticas, baseadas na estrutura do SiO2, obtidas pelo método de sol-gel para fins de dosimetria das radiações ionizantes ambientais. Através da Análise por Ativação com Nêutrons Instrumental (AANI) e Fluorescência de Raios X por Reflexão Total (TXRF), foram determinadas as principais impurezas em concentrações maiores, menores e traços de for

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23

Ventieri, Alexandre. "Síntese e caracterização de aluminatos de cálcio e lítio dopados com terras-raras para uso como detectores de radiações ionizantes." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3140/tde-19122016-142840/.

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Neste trabalho foram estudadas as propriedades dosimétricas de aluminatos de cálcio e lítio sintetizados pela técnica sol-gel e codopados/dopados com os terras-raras európio e térbio. No aluminato de cálcio as caracterizações morfológicas apresentaram fase predominante do Ca12Al14O33 com grãos variando entre 150 - 270 μm, sistema poroso de 200 - 290 nm. As incorporações dos dopantes foram observadas com a formação dos compostos de CaEuAl3O7 e CaTbAl3O7 para as calcinações em 1100 °C e apresentaram os melhores resultados luminescentes. A caracterização luminescente revelou alta intensidade

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24

Lopes, Leandro. "Étude et caractérisation de matrices hybrides polyether-siloxane utilisées pour la libération contrôlée de Diclofenac de Sodium et de complexes à base de Platine." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112146/document.

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La capacité à incorporer le diclofenac de sodium (DFS) ou des composés à base de platine comme le cisplatine (CisPt), le sel de Zeise ou le tétrachlorure de platine IV (PtCl₄) au sein des matrices hybrides basées sur les chaînes polyéther de caractère hydrophilique (PEO) ou hydrophobique (PPO) et utilisant comme points de réticulation des nodules de type siloxane a été étudiée. Ces composés d’intérêt académique possèdent des applications dans le traitement du cancer (cipslatine) ou en catalyse (sel de Zeise). Dans les matrices avec DFS la diminution de la température de fusion de l'hybride PEO

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25

Santos, Eduardo Pena dos [UNESP]. "Estudo da formação de espumas cerâmicas à base de zircônio a partir do processo sol-gel." Universidade Estadual Paulista (UNESP), 2001. http://hdl.handle.net/11449/97751.

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Made available in DSpace on 2014-06-11T19:29:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2001Bitstream added on 2014-06-13T19:58:41Z : No. of bitstreams: 1 santos_ep_me_araiq.pdf: 2607932 bytes, checksum: 5c06a620c980880e28b369b2f69e4022 (MD5)<br>Nesta dissertação analisou-se as condições de formação de espumas cerâmicas a partir de suspensões coloidais à base de zircônia, preparadas pelo processo sol-gel termoestimulado.A formação e estabilidade da espuma foi analisada em função da concentração da suspensão coloidal, concentração de tensoativo, quantidade de agente espumante (Freon

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26

Aubonnet, Severine. "Structural and preparative studies of doped silica glasses." Thesis, Nottingham Trent University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297723.

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27

Nagpal, Vidhu JaiKishen. "In-situ steric stablization of ultrafine titania particles synthesized by a sol-gel process /." This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-07282008-135003/.

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28

Yao, Yu Chen. "Process engineering of ceramic composites and coatings modified with chemically bonded composite sol-gel." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/13904.

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This work explores the possibilities of the application of chemical bonding to process ceramic-ceramic composites by employing ceramic sol-gel as the core processing technique. The principal rationale is that chemical bonding produces ceramic bond at substantially lower temperatures under 600°C, opening new processing possibilities. Versatility of the chemically bonded composite sol-gel alumina is demonstrated by the two final product forms: coatings and wear resistant composites. In Thermal Barrier Coating (TBC) application, an additional ceramic layer is sandwiched between two layers of P

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Keshmiri, Mehrdad. "Composite sol-gel process for photocatalytic titanium dioxide." Thesis, 2004. http://hdl.handle.net/2429/15892.

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Photocatalytic TiO₂ decomposes organic and inorganic pollutants upon irradiation with UV light. TiO₂ thin films and powder suspensions are used for purification treatments, but small surface area of TiO₂ films, and difficult filtration of powders are the two major drawbacks in application of photocatalytic TiO₂. The major objective of this work was to develop a novel process to combine the thin film coatings and the fine (sub-micron) powder anatase TiO₂ to provide high photocatalytic efficiency thick films and self-supported membranes. The microstructural properties and photocatalytic efficien

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30

柯榮明. "A study of strontium titanate sol-gel process." Thesis, 1987. http://ndltd.ncl.edu.tw/handle/39664352464910758002.

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Chen, Chun-Nan, and 陳俊男. "Epoxy/Polysiloxane Hybridized Materials via a Sol-Gel Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/58679414653199966775.

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碩士<br>淡江大學<br>化學學系碩士班<br>93<br>The Organic-Inorganic hybrid materials, become to promise new applications in many fields, such as mechanics,optics, electronics and biology. In order to prepare hybrid materials with the size of inorganic particle on the nano scale, we use the developed method to synthesize the Eopxy/PDMS and Eopxy/TEOS hybrid materials. In this study, we specially via Sol-Gel Process Triethoxy silane terminated on epoxy resins (TESEP) were synthesized by a ring-opening reaction of epoxy resin with 3-aminopropyl triethoxysilane. In sol-gel process treatment, TESEP reacted wit

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Chen, Yen-yu, and 陳彥友. "Formation of Mullite Thin Film by Sol-Gel Process." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/79430620453612931709.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>89<br>Abstract Two formula, TB and TBP, were chosen for the preparation of mullite thin films. Basically, a sol contained TEOS (tetraethylorthosilicate) and boehmite colloid was used in this study. The sols were kept in stoichiometric composition 3Al2O3•2SiO2, or contained a crack-limiting agent, polyvinylpyrrolidone (PVP). These gels were dried, then heat-treated up to 1300oC. The properties of these sols were characterized by rheometer, various thermal analysis techniques (DTA TGA & TMA), also by XRD, SEM and TEM. The gelation results show

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Chen, I.-cheng, and 陳奕成. "The multifunctional fiber platform made by sol-gel process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/4k3474.

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碩士<br>國立中山大學<br>光電工程學系研究所<br>103<br>With emergence of the demand for functional fiber, there are many fiber appeared in succession, such as optical fiber sensors, optical amplifiers, fiber grating, etc. Those fibers indicate the development of optical fiber platform for multifunction will be inevitable. Therefore, we want to study a new fiber preparation for building an optical fiber which could make more materials or elements exist in one fiber. We use sol-gel method to prepare the fiber. Comparing to the main processes, such as MCVD [1], and OVD [2], sol-gel process have lower heat treatment

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Wu, Guan-yu, and 武冠宇. "Preparation of superhydrophobic epoxy films by sol-gel process." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/42812627091118606404.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>97<br>In this study, the superhydrophobic epoxy-based thin film was prepared by mixing epoxy polymer solution and MTMOS solution first, and then the silica powder and PET fibers were added into the mixing solution to increase the roughness and improve the adhesion of the hybrid film, respectively. The characteristic of the film was analyzed by contact angles, adhesion test, SEM images, and AFM results. The experimental result indicated that when the mole fraction of MTMOS increased from 0 to 0.4, the contact angle of the film also increased from 77° to 98°. An

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Chen, Chiahui, and 陳佳慧. "Fabrication of PZT-based biosensor with sol-gel process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/00385827184651581432.

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碩士<br>國立交通大學<br>奈米科技研究所<br>93<br>In recent years, the superior piezoelectric performance of lead-zirconate-titanate （PZT，PbZrxTi1-xO3） ceramic materials were applied for microelectro-mechanical-systems（MEMS）intensively. We deposited 0.6μm PZT piezoelectric thin film on silicon wafer, and applied piezoelectric property of PZT for sensing biological material. Sol-gel method was used to fabricate PZT piezoelectric thin film in current study. A PZT-based ceramic thin film resonator was constructed into a biosensing device. The resonator was capable of detecting 10-11g with resonance frequency

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Hung, Wei-Yu, and 洪偉諭. "Nonlinear Optical Polyimide-Inorganic Materials Via Sol-Gel Process." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/88482943280068253197.

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碩士<br>國立中興大學<br>化學工程學系<br>89<br>Second-order nonlinear optical (NLO) properties of poled polymeric materials have been extensively studied for applications in photonic devices, such as frequency doubling and electro-optical (EO) modulation, because of their large optical nonlinearity, excellent processibility, low dielectric constant, and high laser damage thresholds. But one of the major problems encountered is the poor thermal and temporal NLO stability of the materials. In order to meet application requirements of long-term NLO stability up to 100℃ and short excursion to the temp

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Liao, Pammy, and 廖姵旻. "Preparation of Silica-Polyimide Hybrids Using Sol-Gel Process." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/00730937537727541643.

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碩士<br>國立交通大學<br>材料科學與工程系<br>87<br>In this work sol-gel process was applied to prepare the low dielectric silica-polyimide hybrids and their physical properties were investigated. The FTIR analysis revealed that the hybrid precursors might transform into polyimides containing finely dispersed silica particles by an appropriate curing treatment. As indicated by thermal analysis, all the hybrid specimens exhibited excellent thermal stability that they had glass transition temperatures higher than 280C and decomposition temperatures higher than 600C. Electrical measurement indicated that the

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Huang, Feng-His, and 黃逢璽. "Preparation of UV-curable antireflective coatings by sol-gel process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/33851127171783609148.

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碩士<br>淡江大學<br>化學工程與材料工程學系碩士班<br>93<br>Antireflective coatings produced from sol-gel techniques have received extensive interest recently. Such hybrid materials are used to synthesize new electronic and optical materials. In this investigation, we prepare organic-inorganic hybrid sol by sol-gel process and synthesize the Poly(MSMA-SiO2) and Poly(GPTMS-TiO2) using UV-curing. The organic monomers were γ-Glycidoxy propyl trimethoxysilane (GPTMS), and 3-(trimethoxysilyl) propyl methacrylate (MSMA); inorganic monomers for the preparation were Tetrabutoxyltitanium (TBOT), and tetraethoxysilane (TEOS)

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Shen, Yi-ju, and 沈怡如. "Preparation of superhydrophobic film by two-step sol-gel process." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/16320940959574624987.

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碩士<br>國立中央大學<br>材料科學與工程研究所<br>96<br>Preparation of superhydrophobic tetraethoxylsilane(TEOS)-based silica surfaces by a two-step sol-gel process has been developed. The coating solution was prepared by adding water and acid into TEOS and reacted firstly, then adding ammonia and water into the above solution and reacted again. The roughness surface with hydroxyl groups was obtained by coating this solution onto the glass. Then the hydroxyl groups on the roughness surface were terminated by trimethylchlorosilane(TMCS) to produce a hydrophobic surface. 　　The effect of synthesis parameters, H2O/TE

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Jiang, Jeng-Chin, and 江政慶. "Preparation of Silica /Epoxy/Anhydride Nanocomposite by Sol-Gel Process." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/67391700569024719479.

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碩士<br>南台科技大學<br>化學工程與材枓工程系<br>94<br>Abstract In this study, a highly transparent epoxy, DGEBA (diglycidyl ether of bisphenol-A) and a clear anhydride, 4-methyl hexahydrophthalic anhydride (MHHPA), was cured by a tertiary amine catalyst (C11Z-CN). A sol-gel process was employed to convert tetraethoxysilane into a SiO2 inorganic network, which was interpenetrating with the epoxy organic network. Thermogravimetric analysis (TGA) was used to determine the extent of SiO2 formation, while optical microscope or TEM were used to observe the development of the morphology for this organic-inorganic hyb

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Yeh, Yu-Yang, and 葉羽陽. "Preparation and properties of Ni/ZnO by sol-gel process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/34671886036490766284.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>103<br>Zinc oxide is a N-type semiconductor material, in the visible region has good optical and electrical properties, is widely used in solar cells, photocatalysis and other related fields. It is very suitable as photocatalyst materials because of their non-toxic, high performance, low cost and easy doping. However, zinc oxide is a wide bandgap semiconductor, it can only absorb ultraviolet light. In addition, electrons and holes easier recombination, it showed poor photocatalytic activity in the sunlight. This study will use the triblock copolymer as a natural tem

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Kuo, Luo, and 郭硌. "Preparation and characterization of Al/ZnO by sol-gel process." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/43076624875329207129.

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碩士<br>國立屏東科技大學<br>機械工程系所<br>103<br>When the particle size of photocatalyst down to ''nano'' size, the material due to quantum effects will make semiconductor band gap increase, and improve the redox ability of electron hole pairs. If the particle size of photocatalyst become small,the probability of electron hole pairs migrate to the catalyst surface will become larger to reduce the probability of recombination of electron hole pairs. In addition, element doping could effectively change the specific surface area, particle sizes, and photocatalytic activity of ZnO. In this study, a triblock co

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Chen, Chien-Ming, and 陳建銘. "Preparation of UV-curable antiglare coatings by sol-gel process." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/64201958485868447815.

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碩士<br>淡江大學<br>化學工程與材料工程學系碩士班<br>95<br>In this research, we used a sol-gel process to prepare UV-curable antiglare coatings. First the inorganic monomer tetraethoxylsilane (TEOS) was formed into colloidal silica by hydrolysis and condensation reactions. Then, added the couple agent 3-(trimethoxysilyl) propyl methacrylate (MSMA) and surfactant fluoroalkylsilane (13F) to modify the colloidal silica. Finally, organic monomer dipentaerythritol hexaacrylate (DPHA) were added to form hybrid material. We controlled the composition of reactants (TEOS, HCl, DPHA, MSMA) and reaction time to study their

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Chuang, Kun-Chang, and 莊坤璋. "Study on Polyimide-Silicate Hybrids Prepared by Sol-Gel Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/2tz5uw.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>93<br>In this study, two kinds of monomers-3,3’,4,4’- Biphenyl tetracarboxylic dianhydride (BPDA) and p-phenylenediamine (p-PDA) were employed to synthesize the poly(amic acide) (PAA) precursor of polyimide. Though a sol-gel process, The silica nano-particles were induced into the PAA precursor. Nanocomposites were obtained from PAA mixture load with silica particles combined with spin coating and multi-step curing process. In this study, silica particles were induced into the PI matrix to promote its thermal properties. The coupling agent 3-aminopropyl triethoxys

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Hsieh, Hung-Min, and 謝宏旻. "Characterization of Zn1-xMgxO Thin Films Prepared by Sol-gel Process." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/63573380023694658443.

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碩士<br>國立中興大學<br>光電工程研究所<br>101<br>In this thesis, the Zn1-xMgxO thin films were deposited on glass and Si substrates by the sol-gel spin coating technique. The structural, optical and electrical properties of Zn1-xMgxO thin films fabricated with different Mg doping concentration and sintering temperatures have been investigated. Examined by the X-ray diffraction measurement, the grain size and c-axis constant decrease with the increase of Mg-doped concentration. All the films exhibit c-axis preferred orientation and no other phase segregation. The Zn1-xMgxO thin films exhibit the same wurt

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Lee, Chien-Tsang, and 李建蒼. "Photoluminescence Properties of ZnO Thin Films Prepared by Sol-Gel Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/71243896477180073524.

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碩士<br>國立高雄應用科技大學<br>電子與資訊工程研究所碩士班<br>93<br>The ZnO phosphor thin films were deposited on SiO2/Si substrates by spin coating with sol-gel processing in this thesis. By changing the heating temperature (600℃~900℃) and the annealing atmospheres, the effects of various processing parameters on the thin film growth and photoluminescence intensity of the thin films were investigated. The physical characteristics of ZnO thin films deposited with different processing parameters were obtained by the analyses of XRD,SEM and XPS. The optical properties of ZnO thin films were discussed by photoluminescenc

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Weng, Wei-Hsiang, and 翁維祥. "Organic/Inorganic Nanocomposite and superhydrophobic Material Synthesized via Sol-Gel Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/20378539890755745211.

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博士<br>國立中央大學<br>化學工程與材料工程研究所<br>93<br>In this research, sol-gel process was utilized to fabricate organic/inorganic nano-composite material and superhydrophobic film. Organic/Inorganic composite material included two separate parts, one was Epoxy/SiO2 hybrid material and the other one was PMMA/SiO2 composite sphere. The fabrication of superhydrophobic film also discussed with hydrophobic and superhydrophobic film individually. Sol-gel process was utilized to synthesize epoxy-silica hybrid materials in nanoscale in recent years. The purpose of this part is to fabricate hybrid material in na

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Yang, Tung-Sheng, and 楊東昇. "Characterization of HfO2 and Ta2O5 Mixed Film by Sol-Gel process." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/uknrgk.

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碩士<br>中原大學<br>電子工程研究所<br>104<br>The aim of this research is to investigate the thin films properties of HfO2,Ta2O5 and the mixed film of HfO2:Ta2O5 by Sol-Gel process. In detail, the precursor of these studies is Alcohol and Chloride (TaCl5, HfCl4), the reactant is H2O. Firstly, the Oxide film could be formed after those following processes as Alcoholysis, Hydrolysis and Condensation. Secondly, the film could be coated on Silicon substrate and Sapphire by Spin Coating method. Thirdly, through thermal annealing in 700 degrees Celsius lasting 4 hours under N2 environment, Finally, the film’s cry

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Liu, Szu-ling, and 劉思伶. "A Study of Polyimide-Organosilicate Hybrids Prepare by Sol-Gel Process." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/44797883225957233555.

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碩士<br>國立交通大學<br>材料科學與工程系<br>89<br>Sol-gel process was applied to prepare the low dielectric polyimide（PI）- organosilicate hybrids and their physical properties were investigated. The FTIR results confirmed that the hybrid precursors might transform into polyimides containing finely dispersed organosilicate particles by appropriate curing treatment. The organosilicates were not dense structures and can dispersed with the size of several nm in the PI matrix, as is reasonably inferred from the 29Si CP MAS solid NMR、Si Mapping、SEM and TEM results. All hybrid specimens exhibited excellent thermal s

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Jiang, Jr-Yuan, and 姜智遠. "Modification of PVA by sol-gel process and evaluation of properties." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/44100932064937076326.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>95<br>In this study, we prepared organic-inorganic composite material of polymer electrolyte membrane via modification of poly(vinyl alcohol) (PVA) by sol - gel and discuss its electrical properties in cell system. First, we chosen PVA as the major base and then grafted the monomer of 2-hydroxyethyl methacrylate (HEMA) and acrylic acid (AAc) by ultraviolet radiation. After that, we obtained two different components of PVA/poly(HEMA) and PVA/poly(acrylic acid) polymer. Then we used them as the basic material which was further modified by sol - gel. And we investigate

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