【學術亮點】Self-Assembly of Gyroid-Forming Diblock Copolymers under Spherical Confinement | IDCSA, NCHU

【學術亮點】Self-Assembly of Gyroid-Forming Diblock Copolymers under Spherical Confinement 2023-01-10

Ecological Agriculture: Optimization and Validation of Soil Carbon Sequestration Prediction Models【Department of Materials Science Engineering / Hsueh, Han-Yu / Associate Professor】
生態農業：土壤碳蓄存之預測模型優化及驗證【材料科學與工程學系/薛涵宇副教授】

論文篇名	英文：Self-Assembly of Gyroid-Forming Diblock Copolymers under Spherical Confinement 中文：螺旋二十四面體雙嵌段共聚物於球形空間侷限之自組裝行為
期刊名稱	Macromolecules
發表年份,卷數,起迄頁數	2023, 56, 457−469
作者	Juan, Yen-Ting; Lai, Yu-Fang; Li, Xingye; Tai, Tsung-Cheng; Huang, Chih-Feng; Lin, Ching-Hsun; Li, Baohui; Shi, An-Chang; Hsueh, Han-Yu(薛涵宇)*
DOI	10.1021/acs.macromol.2c02086
中文摘要	透過模擬和實驗系統性研究受限於球形內的螺旋二十四面體雙嵌段共聚物（gyroid diBCPs）的自組裝。使用單位位點鍵結流動模型之蒙特卡洛模擬，計算兩種體積分率不同的gyroid diBCPs，以退火方法建立的模型。實驗以受限於球形腔體內的旋二十四面聚苯乙烯-b-聚乳酸雙嵌段共聚物進行，這些腔體是利用聚苯乙烯膠體的自組裝形成蛋白石結構，並替換成反蛋白石結構製備而成。腔體的表面由疏水性聚氨酯丙烯酸酯和親水性二氧化矽組成，提供具有不同高分子區塊親和性的限制表面。根據球形限制的條件，從實驗和模擬都可觀察到螺旋二十四面體diBCPs的自組裝行為擁有豐富多樣的奈米結構，且由模擬的預測形態與實驗結果所觀察到的型態一致，而自組裝的結構對表面選擇性和D/L₀比值定量化限制程度(D和L₀分別是穩定之螺旋二十四面體相態的球形直徑和周期）非常敏感。形成的奈米結構自組裝球體在藥物釋放、催化劑、光電子器件、過濾器等應用中具有相當大的潛力。
英文摘要	The self-assembly of gyroid-forming diblock co-polymers (diBCPs) confined in spherical cavities was systematically investigated by simulations and experiments. The Monte Carlo simulations were carried out on the single-site bond fluctuation model of two gyroid-forming diBCPs of different volume fractions using the simulated annealing method. The experimental study was performed on gyroid-forming poly(styrene)-b-poly(lactic acid) diBCPs confined in spherical cavities. The cavities were fabricated through the assembly of polystyrene colloids to form opal structures, followed by replacement to form inverse opal structures. The surface of the cavities was composed of hydrophobic polyurethane acrylate and hydrophilic SiO₂, providing confining surfaces with a different preference for specific polymeric blocks. It was observed from both the experiments and simulation that, depending on the conditions of spherical confinement, a rich array of nanostructures was self-assembled from the gyroid-forming diBCPs. The morphological predictions of simulations are qualitatively consistent with the experimental observations. The self-assembled structures depend sensitively on the surface selectivity and the degree of confinement quantified by the ratio D/L₀, where D and L₀ are the spherical diameter and period of the equilibrium gyroid phase, respectively. The formed nanostructured self-supporting spheres have considerable potential for applications in drug release, catalysts, optoelectronic devices, filters, and other applications.
發表成果與本中心研究主題相關性	此研究建立了雙嵌段共聚物製備成球體顆粒可能發生的相變化行為，所製成的奈米多孔球體將可結合潤滑液體注入多孔表面(SLIPs)應用於抗汙表面的開發，透過噴塗方式投放於農業領域，展現出潛在的抗汙和抗生物附著能力。將多孔隙奈米顆粒製成SLIPS系統，能塗佈於農業設施表面形成均勻的奈米結構，此結構之低表面能和自潤滑特性將使汙垢難以附著，有助於保持設施表面的清潔。也可應用於多種農業設施，如溫室覆蓋物或水肥管道，有效抑制生物附著和污染物的積聚，提高設施的使用壽命和效能。此表面的高穿透性應用於溫室建材等，可確保充足的陽光進入溫室，促進作物的生長，而抗汙特性可保持覆蓋物的清潔度，增進光線穿透度，對農作物生長十分有利。總括而言，將本研究開發的多孔隙奈米顆粒製成SLIPS系統並噴塗於農業設施，能有效抵抗汙染和生物附著，提升設施的耐用性和效能，為現代農業帶來正面影響，並推動其向更高效、環保的方向發展。