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Citation: ng Xiao-Yi, Huang Yu-Hui, Cong Guang-Min. The Effect of Plasma Treatment of Mica Powder on its Surface Characteristics and Interface Behavior with Linear Macromolecules[J]. Acta Physico-Chimica Sinica, ;1991, 7(05): 605-608. doi: 10.3866/PKU.WHXB19910518 shu

The Effect of Plasma Treatment of Mica Powder on its Surface Characteristics and Interface Behavior with Linear Macromolecules

1.
Guangzhou Institute of Chemistry, Academia Sinica, Guangzhou 510650

Received Date: 5 April 1990
Available Online: 15 October 1991

In this work mica powder was treated with n-butyl aldehyde plasma of radio frequency. Then the apparent contact angle of different liquids on the powder was determined by measuring the penetration rate of the liquid through the packed powder. The surface tension of mica powder and interface tension between the powder and typical linear macromolecules were calculated from the data of contact angle obtained under Fowkes' assumption. Rationalized conclusions were as follows: (i) For polar liquids, wetting of treated mica is more difficult than the untreated one and for nonpolar liquids, no difference has been observed. (ii) The surface tension of mica powder drops from 41.34 (N·m~(-1)·10~(-3)) to 31.51 after 5 min plasma treatment and to 25.59 (N·m~(-1)·10~(-3)) after 30 min plasma treatment. (iii) The polar component of interface tension between the mica powder and any linear macromolecule monotonically decreases with the time of plasma treating. However, the whole interface tension changes after plasma treatment, depending on the polymer used.
- n-butyl aldehyde plasma; Surface; Interface; Fillers
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