Poly(N-isopropylacrylamide)-Tethered Silicate Platelets for Colloidal Dispersion of Conjugated Polymers with Thermoresponsive and Photoluminescence Properties

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• 作者：Yi-Fen Lan ; Bi-Zen Hsieh ; Hsiao-Chu Lin ; Yu-An Su ; Ying-Nan Chan ; Jiang-Jen Lin
• 刊名：Langmuir
• 出版年：2010
• 出版时间：July 6, 2010
• 年：2010
• 卷：26
• 期：13
• 页码：10572-10577
• 全文大小：1155K
• 年卷期：v.26,no.13(July 6, 2010)
• ISSN：1520-5827

文摘

Poly(N-isopropylacrylamide)-tethered nanosilicate platelets (NSP-PNiPAAm) have been synthesized by covalently bonding the polymer onto the surfaces of silicate platelets of nanometer dimension, and this class of nanohybrids has proved to be effective for dispersing water-insoluble conjugated polymers (CPs). Simple pulverization of poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) with NSP-PNiPAAm rendered the powder material dispersible in water, whereupon it displayed thermoresponsive properties at 37.5 °C and CP particle size variation between ca. 50 and 100 nm by SEM observation. The same dispersion had a maximum UV−vis absorption at 524 nm and PL emission at 605 nm. The PL emission was significantly higher at 4 °C than at 45 °C. Being coated as a film, it showed an orange emission under an ultraviolet lamp, consistent with the PL measurement. The water-borne process of dispersing the CP in aqueous media by the presence of NSP-PNiPAAm and followed by film formation to demonstrate a unique method of manipulating hydrophobic conjugated polymers in a facile manner.