利用核殼結構次微米球建構具耐溶劑性質及機械性質之光子晶體膜

Photonic Crystal Films with Excellent Solvent Resistance and Mechanical Properties by Using Core-Shell Submicrospheres

陳鴻昇(Hong-sheng Chen)

指導教授 ： 陳暉

國立中央大學/工學院/化學工程與材料工程學系/碩士(2015年)

摘要

本研究乃利用無乳化劑乳化聚合法於沸騰狀態，搭配二階段單體添加的製備方式，設計一系列具有硬核心以及軟殼層之均一粒徑核殼結構次微米球，硬核心提供光子晶體膜所需要的結晶性質，維持周期性之規則排列，軟殼層則作為黏著劑的角色，增加球與球之間高分子鏈相互纏繞的連結力，提升光子晶體成膜性質。
研究之核殼結構次微米球包含PS/PBA、PS/PBMA、PS/P(BA-co-SCA)、PS/P(BA-co-SCA-co-DVB)、P(St-co-MMA-co-DVB)/P(BA-co-SCA)、P(St-co-MMA-co-DVB)/P(BMA-co-SCA)。當自交聯劑(Self-crosslinking agent, SCA)導入二階段添加單體程序當中，有助於次微米球內形成明顯核心以及殼層結構，使殼層能夠有效改質核心，達到所需之性質；並藉由核心及殼層之折射率差，使光子晶體膜能夠顯示結構性色彩。同時，SCA添加量適當時，其提供之官能基作用力可增加顆粒於室溫自組裝時，排列之規則度，進而提升光子晶體膜之光學性質。另一方面，透過SCA的官能基團進一步行自交聯反應，於殼層高分子相互纏繞形成的連續相內，產生共價鍵結之網狀交聯體結構，可應用於提升光子晶體薄膜的機械強度及耐溶劑性質。

關鍵字

無乳化劑乳化聚合 ； 均ㄧ粒徑核殼結構次微米球 ； 自交聯劑 ； 光子晶體 ； 機械強度 ； 耐溶劑性質

並列摘要

In this study, monodispersed core-shell submicrospheres were prepared by two-step soap-free emulsion polymerization at boiling state. Hard core provided crystalline ability that maintain periodic array. On the other hand, soft shell as the role of adhesive between particles that improved film-forming property of photonic crystal(PC).
The monodispersed core-shell submicrospheres were PS/PBA, PS/PBMA, PS/P(BA-co-SCA), PS/P(BA-co-SCA-co-DVB), P(St-co-MMA-co-DVB)/P(BA-co-SCA),P(St-co-MMA-co-DVB)/P(BMA-co-SCA).
The core-shell structure submicrospheres were obtained by introducing SCA (Self-crosslinking agent). So, PC could exhibit structure colors by these submicrospheres. Photonic bandgap were improved by appropriate amount of SCA which could increase regular arrangement by functional force interparticles. Moreover, functional groups of SCA were further reacted by self-condensation to form network structure to improve the mechanical strength and solvent-resistance properties of PC.

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