PL EN


Preferences help
enabled [disable] Abstract
Number of results
2015 | 127 | 5 | 1536-1539
Article title

Investigation of PCM Microcapsules with Paraffin Filling by Positron Lifetime Spectroscopy

Authors
Content
Title variants
Languages of publication
EN
Abstracts
EN
Positron annihilation lifetime spectroscopy was applied to investigate the microcapsules composed of n-eicosane (filling material) and polysiloxane polymer (shell) in the range of temperatures 123-333 K. Pure components of microcapsules were also investigated as a base for interpretation of the measurement results. The temperature of phase transitions in microcapsules was determined. It showed the appearance of a rotary phase, which is not present in pure n-eicosane. In the considered material, two types of free volume have been identified. The sizes of free volumes able to accommodate Ps were estimated using standard models. On the basis of the o-Ps intensities, the content of polysiloxane in microcapsules was estimated as about 40%. Internal structure of the microcapsules (morphology) was observed by scanning electron microscopy.
Keywords
Year
Volume
127
Issue
5
Pages
1536-1539
Physical description
Dates
published
2015-05
References
  • [1] S.J. Tao, J. Chem. Phys. 56, 5499 (1972), doi: 10.1063/1.1677067
  • [2] M. Eldrup, D. Lightbody, J.N. Sherwood, Chem. Phys. 63, 51 (1981), doi: 10.1016/0301-0104(81)80307-2
  • [3] B. Jasińska, A.E. Kozioł, T. Goworek, J. Radioanal. Chem. 210, 617 (1996), doi: 10.1007/BF02056403
  • [4] B. Zgardzińska, Acta Phys. Pol. A 125, 700 (2014), doi: 10.12693/APhysPolA.125.700
  • [5] T. Goworek, K. Ciesielski, B. Jasińska, J. Wawryszczuk, Chem. Phys. Lett. 272, 91 (1997), doi: 10.1016/S0009-2614(97)00504-6
  • [6] K. Pielichowska, K. Pielichowski, Prog. Mater. Sci. 65, 67 (2014), doi: 10.1016/j.pmatsci.2014.03.005
  • [7] M. Maroncelli, H.L. Strauss, R.G. Snyder, J. Chem. Phys. 82, 2811 (1985), doi: 10.1063/1.448280
  • [8] A. Genovese, G. Amarasinghe, M. Glewis, D. Mainwaring, R.A. Shanks, Thermochim. Acta 443, 235 (2006), doi: 10.1016/j.tca.2006.02.008
  • [9] M. Maroncelli, S.P. Qi, H.L. Strauss, R.G. Snyder, J. Am. Chem. Soc. 104, 6237 (1982), doi: 10.1021/ja00387a013
  • [10] W. Fortuniak, S. Slomkowski, J. Chojnowski, J. Kurjata, A. Tracz, U. Mizerska, Colloid Polym. Sci. 291, 725 (2013), doi: 10.1007/s00396-012-2782-z
  • [11] J. Kansy, Nucl. Instrum. Methods Phys. Res. A 374, 235 (1996), doi: 10.1016/0168-9002(96)00075-7
  • [12] A. Ekstrom, R. Suenram, J.E. Willard, J. Phys. Chem. 74, 1888 (1970), doi: 10.1021/j100704a011
  • [13] Y. Ito, T. Hirade, E. Hamada, T. Suzuki, Y. Ito, Acta Phys. Pol. A 95, 533 (1999)
  • [14] M. Pietrow, B. Zgardzińska, Acta Phys. Pol. A 110, 641 (2006)
  • [15] B. Zgardzińska, T. Goworek, Chem. Phys. Lett. 547, 35 (2012), doi: 10.1016/j.cplett.2012.08.003
Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n525kz
Identifiers
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.