- 學位論文
以總體聚合法與溶液聚合法製備孔隙性二氧化矽/壓克力奈米複合材料及其性質研究
Synthesis and Properties Studies of Poly(methyl methacrylate)/Mesoporous Silica Nanocomposite Materials Prepared via Bulk Polymerization and Solution Polymerization
摘要
摘要 本論文是以非界面活性劑模版法為基礎，製備有機/無機孔隙性複合材料，並對合成的材料做一系列的分析與探討。論文主要分為兩部份，利用非界面活性劑模板法為實驗概念，以Dibenzoyl-L-tartaric acid (DBTA)當作孔洞形成劑，3-(trimethoxy silyl) propyl methacrylate) (MSMA)為修飾劑，Tetraethoxysilane (TEOS)為前趨物，在酸性條件下直接將有機官能機合成修飾於中孔洞材料中。第一部份討論以總體聚合法 (In-situ polymerization) 的製備方式合成壓克力/二氧化矽奈米複合塊材 (PMMA/silica nanocomposite bulk)，將使用兩種形式的無機二氧化矽材料，分別為利用非面活性劑模板法所合成的孔隙性二氧化矽 (mesoprorus silica) 以及非孔隙性二氧化矽材料 (raw silica)，兩者材料的表面均經過乙烯基官能基的修飾，最後將針對合成此有機/無機複合材料時所添加的無機材料為孔隙性或非孔隙性於熱傳導性質、介電性質、光學性質與機械性質等做一系列的性質比較與討論。 第二部份是以溶液聚合法 (Solution polymerization)的製備方式合成壓克力/二氧化矽奈米複合薄膜 (PMMA/silica nanocomposite film)。本研究中，將進一步探討奈米複合薄膜在熱性質及氣體分離之變化。利用穿透式電子顯微鏡 (TEM) 觀察中孔洞材料分散於高分子中的情形；使用氣體滲透分析儀 (GPA) 量測氣體透過量之相關數據；另外，以微差掃描式熱分析儀 (DSC) 觀察奈米複合薄膜之熱性質變化，以熱傳導分析儀 (TPS) 量測奈米複合薄膜之熱傳導性質。
並列摘要
Abstract In this thesis, we have synthesis minerals mesoporous and bulky polymer multi-porous based on non-surfactant templated technique, this essay is divided into two sections. A series of organo-modify mesoporous materials have been synthesized through nonsurfactant templated sol-gel route of tetraethyl orthosilicate (TEOS) and 3-(trimethoxy silyl)propyl methacrylate) (MSMA) with Dibenzoyl-L-tartaric acid (DBTA) as a templates. The MSMA that as a modify agent and TEOS were co-condensation into the three-dimensional silica framework through the sol-gel process. After removed the DBTA by extracted exhaustively, the organic modify mesoporous materials were obtained. In sectionⅠ, we have described the comparative studies of organic-modified silica particles with/without mesopores used as fillers to form a series of organic/inorganic nanocomposites and the role of bulk organic group, which have better improved thermal properties, photophysical and storage property etc. On the other side, a series of PMMA/silica nanocomposite film were prepared by the solution polymerization. The synthesized materials were subsequently investigated with a series of characterization techniques, including transmission electron microscopy (TEM). Comparative studies of the optical clarity, molecular barrier properties, and thermal stability of samples prepared in both ways, as membranes and fine powders, were also performed with thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and gas permeability analysis (GPA), thermal conductivity, respectively.