Schizophrenic micelle of a water-soluble diblock polymer and its application to a thermo-optical device

作者：Alam Mohammad Mydul; Keiko Hiraoka; Yusa Shinichi; Nakashima Kenichi^*

来源：Colloid and Polymer Science, 2014, 292(7): 1611-1617.

DOI：10.1007/s00396-014-3205-0

• PMAA-PNIPAM
• Thermo-optical
• Schizophrenic micelle
• UV-vis

An investigation has been carried out to understand the schizophrenic behavior of a water-soluble diblock polymer poly-(methacrylic acid-block-N-isopropyl acrylamide) (PMAA(18)-b-PNIPAM(86)) and to fabricate a thermo-optical device. At room temperature, the polymer is molecularly dissolved in an aqueous solution which is indicated by weak scattering signal. The scattering intensity increased abruptly with increasing temperature, an indication of the formation of PNIPAM-core/PMAA-corona micelles. On the other hand, in the presence of calcium ion (Ca2+), PMAA-core/PNIPAM-corona micelles are formed at room temperature. Interestingly, the PMAA-core and PNIPAM-core are reversibly interchangeable to each other by removing/adding the outer stimuli (i.e., Ca2+ and heat). The UV-vis spectra reveal that the optical properties of the gold-polymer conjugate changes with heating and cooling. This suggests that the schizophrenic micelle can be used to fabricate a thermo-optical device.

• 出版日期2014-7