Abstract
Superhydrophobic surfaces were obtained by coating with microspheres formed by the self-assembly of poly[2-(perfluorooctyl)ethyl acrylate-ran-2-(dimethylamino)ethyl acrylate] (P[POA-r-DAA]) in the presence of dicarboxylic acids in supercritical carbon dioxide. The P[POA-r-DAA] random copolymer aggregated into micellar microspheres through the hydrogen bond cross-linking of the amino groups via the carboxylic acids. The size of the microspheres and the amount of the acids needed to produce them were dependent on the kinds of acids. Glutaric acid (Glu) and perfluorosuccinic acid (Psuc) provided microspheres at a 0.5 molar ratio of the acid/DAA. Psuc produced smaller microspheres than Glu. Maleic acid (Ma), succinic acid (Suc), and azelaic acid (Az) required a higher molar ratio to produce the microspheres. These acids provided spherical particles at the ratio of 1.0. The microspheres produced by Suc and Az contained particles with a several hundred nanometer size. The surface coated with the microspheres showed high water contact angles of 164°–172°.
Notes
The broad molecular weight distribution of the copolymer should be based on the poor solubility of the POA units. In fact, as the molar ratio of the POA to DAA units in the copolymer increased, the molecular weight distribution increased [22]. However, the differential scanning calorimeter analysis confirmed that no POA homopolymer was included in the copolymer.
Poly(POA) showed the melting temperature at 72.2 °C, whereas poly(DAA) had the melting temperature below −50 °C.
References
Nakajima A, Fujishima A, Hashimoto K, Watanabe T (1999) Adv Mater 11:1365
Zhang X, Shi F, Yu X, Liu H, Fu Y, Wang Z, Jiang L, Li X (2004) J Am Chem Soc 126:3064
Kojima A, Izumi Y, Kowase Y, Ohte T, Miyashima K (1998) J Photopolym Sci Technol 11:321
Chen W, Fadeev AY, Hsieh MC, Oner D, Youngblood J, McCarthy TJ (1999) Langmuir 15:3395
Woodward I, Schofield WCE, Roucoules V, Badyal JPS (2003) Langmuir 19:3432
Youngblood JP, McCarthy TJ (1999) Macromolecules 32:6800
Morra M, Occhiello E, Garbassi F (1989) Langmuir 5:872
Xie Q, Xu J, Feng L, Jiang L, Tang W, Luo X, Han CC (2004) Adv Mater 16:302
Onda T, Shibuichi S, Satoh N, Tsujii K (1996) Langmuir 12:2125
Shibuichi S, Onda T, Satoh N, Tsujii K (1996) J Phys Chem 100:19512
Yabu H, Takebayashi M, Tanaka M, Shimomura M (2005) Langmuir 21:3235
Erbil HY, Demirel AL, Avci Y, Mert O (2003) Science 299:1377
Lu X, Zhang C, Han Y (2004) Macromol Rapid Commun 25:1606
Lau KKS, Bico J, Teo KBK, Chhowalla M, Amaratunga GAJ, Milne WI, McKinley GH, Gleason KK (2003) Nano Lett 3:1701
Feng L, Li S, Li Y, Li H, Zhang L, Zhai J, Song Y, Liu B, Jiang L, Zhu D (2002) Adv Mater 14:1857
Li H, Wang X, Song Y, Liu Y, Li Q, Jiang L, Zhu D (2001) Angew Chem Int Ed 40:1743
Feng L, Li S, Li H, Zhai J, Song Y, Jiang L, Zhu D (2002) Angew Chem Int Ed 41:1221
Feng X, Feng L, Jin M, Zhai J, Jiang L, Zhu D (2004) J Am Chem Soc 126:62
Jiang L, Zhao Y, Zhai J (2004) Angew Chem Int Ed 43:4338
Shiu JY, Kuo CW, Chen P, Mou CY (2004) Chem Mater 16:561
Han JT, Xu X, Cho K (2005) Langmuir 21:6662
Yoshida E, Nagakubo A (2007) Colloid Polym Sci 285:441
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yoshida, E., Nagakubo, A. Superhydrophobic surfaces of microspheres obtained by self-assembly of poly[2-(perfluorooctyl)ethyl acrylate-ran-2-(dimethylamino)ethyl acrylate] in supercritical carbon dioxide. Colloid Polym Sci 285, 1293–1297 (2007). https://doi.org/10.1007/s00396-007-1712-y
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00396-007-1712-y