Table 2 Porous properties of the beads using nitrogen adsorption before and after polymer modification.

From: Effect of pore diameter on the elution behavior of analytes from thermoresponsive polymer grafted beads packed columns

Pore diameter (nm)

Beads

Surface area (m2/g)

Total pore volume (cm3/g)

Peak pore diameter (nm)

7

Aminopropyl silica beads

169

0.331

10.8

P(NIPAAm-co-BMA)-modified beads

159

0.460

8.31

12

Aminopropyl silica beads

252

0.910

14.1

P(NIPAAm-co-BMA)-modified beads

180

0.568

12.6

30

Aminopropyl silica beads

99.0

0.680

27.3

P(NIPAAm-co-BMA)-modified beads

94.3

0.568

24.1

  1. The values were calculated using the Brunauer–Emmett–Teller (BET) method.
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