光固型壓克力/無機層狀奈米複材之製備性質研究

本研究藉由天然黏土(CL120)、鎂鋁層狀雙氫氧化合物(MgAl LDH)兩種層狀材料，進行光固型壓克力/改質型無機層狀材料之混成，探討其機械性質、附著力及光學性質的影響。天然黏土(CL120)以有機改質劑椰油醯兩性基二丙酸二鈉（Disodium Cocoamph odipropionate, K2），以離子交換法將改質劑插層於層板間，並製備(CL120-K2-0.5、CL120-K2-1、CL120-K2-1.5、CL120-K2-2、CL120-K2 -2-3 %、CL120-K2-2-5 %)。鎂鋁層狀雙氫氧化合物(MgAl-LDH)有機改質劑十二烷基苯磺酸鈉 (Sodium dodecyl benzene sulfonate，SDBS)，以鍛燒法輔以水熱法進行還原將改質劑插層於層板間，並製備(MgAl-LDO-SDBS-0.5、MgAl-LDO-SDBS-1、MgAl-LDO-SDBS-1.5、MgAl-LDO- SDBS-2、MgAl-LDO-SDBS-2-3 %、MgAl-LDO-SDBS-2-5 %)。利用傅立葉轉換紅外線光譜儀（Fourier Transform Infrared, FT-IR）鑑定改質劑官能基之存在；以X光繞射儀（X-ray Diffraction, XRD）觀察改質前後層間距變化；以熱重分析儀（ThermogravimetryAnalyzer, TGA）分析改質後的天然黏土與鎂鋁層狀雙氫氧化合物中改質劑的插層量。奈米複合材料藉由穿透式電子顯微鏡（Transmission electronmicr oscopy, TEM）觀察其分散性；紫外光-可見光圖譜分析(Ultra violet-visiblespectroscopy , UV-visible)檢測可見光穿透度，塗膜光穿透度皆維持在80 %以上，可以發現添加改質型無機層狀材料後光穿透度並不會產生大幅的下降，塗料添加有機官能化無機層狀材料，物理性質方面:鉛筆硬度可以提升1~2個級數，耐衝擊可以使塗膜受到撞擊不會產生裂痕或碎裂，並且維持與高分子基材的附著度。本實驗顯示以奈米黏土混成於光固化壓克力樹脂中，可以有效提升塗料的表面硬度、附著度、熱性質以及耐衝擊性的特性。對於光學穿透度、光澤度將影響降到最小。

關鍵字

塗料；光固化；壓克力；奈米級複合材料

並列摘要

In this study, pristine sodium montmorillonite clay (CL120) was modified by using cocoamphodipropionate (K2), and magnesium aluminum layered double hydroxide (MgAl LDH) was modified by using sodium dodecyl benzene sulfonate (SDBS) via ion exchange method to enhance the compatibility between the clay or LDH platelets and the methyl methacrylate polymer matrix. PMMA/clay nanocomposites were synthesized via photo-cured polymer process. The dispersion morphology of the CL120-K2 or MgAl LDH-SDBS in polymer matrix was studied by X-ray diffraction (XRD) and Transmission Electron Microscope (TEM). The optical properties were assessed using UV-Visible spectroscopy, which revealed that these materials have good optical clarity, UV resistance, and scratch resistance. The effect of the dispersion capability of CL120-K2 or MgAl LDH-SDBS on the thermal properties of PMMA/clay nanocomposites was investigated by thermogravimetric analysis and differential scanning calorimetry; photo curable acrylic resin effectively improve the surface hardness, adhesion and impact resistance properties. These analyses revealed excellent thermal stability of some nanofiller nanocomposites.

並列關鍵字

Coating ； Photo-curable ； PMMA ； Nanocomposites

參考文獻

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22.顏千翔, "乙烯基酯樹脂/無機層狀材料奈米複合材料之製備與性質探討", 中原大學化學系碩士論文, 2015.

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47.葉建麟, "奈米化無機層材以雙螺桿混練製備聚烯烴奈米複材之開發與性質探討", 中原大學化學系碩士論文, 2013.

3.Y. H. Yu, C. Y. Lin, J. M. Yeh, "Poly(N-vinylcarbazole)–Clay Nanocomposite Materials Prepared by Photoinitiated Polymerization with Triarylsulfonium Salt Initiator", Applied Polymer Science, 91, 1904–1912, 2004.

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光固型壓克力/無機層狀奈米複材之製備性質研究

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