二氧化鈦核殼結構之熱特性研究

Thermal Properties of Core–Shell Structured Titanium Dioxide

隨著地球暖化，生活周遭溫度日益上升，阻熱議題備受關注；核殼結構具降低材料熱傳導性能理論架構，對於應用建築隔熱場域具高度應用潛力。本研究以溶膠-凝膠法（Sol-gel method）製備二氧化鈦複合於空心玻璃微球核殼結構（Titanium dioxide-composite hollow Spheres，TiO2／HGM），藉聚二甲基矽氧烷（Polydimethylsiloxane，PDMS）載台建構複合材料，探討不同參數對於塗層之熱傳與耐蝕穩定性。實驗包含：（1）掃描式電子顯微鏡；（2）X-光繞射分析儀；（3）紫外線可見光譜儀；（4）接觸角分析儀；（5）自設場域熱性能試驗。結果顯示，經被覆TiO2／HGM複合塗料後，光學反射率、耐蝕及疏水性皆獲得改善，隔熱性能相較玻璃基材顯著提升5.5倍。本研究成果具備未來於建築及工業實務應用之發展潛力，可提供現代建築隔熱及工業需求嶄新技術揀選參考。

In an effort to solve the problem of increasing temperature caused by global warming, a TiO2/hollow glass microsphere (TiO2/HGM) core–shell structure was prepared by sol–gel process and inserted into the PDMS matrix to make thermal insulation composite coatings. This study aimed to examine the effect of different processing conditions on the coating's thermal conductivity and environmental stability. Experiments performed were (1) Scanning Electron Microscopy (SEM); (2) X-ray Diffraction (XRD); (3) Ultraviolet–Visible Spectroscopy (UV–Vis); (4) Contact Angle Analysis; and (5) In-house thermal performance testing. The results showed that the TiO2/HGM–PDMS composite coating displayed improved optical reflectivity, corrosion resistance, and surface hydrophobicity.
The thermal insulation performance was enhanced 5.5 times compared to the uncoated glass substrates. The results show the potential of TiO2/HGM-based coatings to be used as innovative materials for energy-saving applications in architecture and industry.