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Porosity and the Absorption of Phosphate-Buffered Saline (PBS) Solution

XK Xiangqian Kong
YH Yuxiang He
HZ Hua Zhou
PG Peixian Gao
LX Lei Xu
ZH Zonglin Han
LY Le Yang
MW Mo Wang
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The porosity of nanofibers was carried out using the liquid displacement method. Firstly, the dry weight of nanofibers was weighed as W1. Then, four groups of nanofibers were immersed in ethanol for 2 h at 25 °C and weighted as W2. The ethanol on the sample surface was removed by filter paper, and the weights of samples were then noted as W3. The porosity of the nanofibers was calculated by the following formula:

For the PBS solution absorption test, the obtained nanofibers were weighed in a dry state and recorded as Wd. Then, the nanofibers were soaked in PBS for 24 h at 25 °C and the weight at wet state was recorded as Ww after removing the excess liquid on the sample surface. The swelling ratio can be measured by the following equation:

All the values in the above experiments are expressed as the mean ± SD (n = 3).

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