. Author manuscript; available in PMC: 2011 Mar 29.

Published in final edited form as: Biomacromolecules. 2007 Nov 30;9(1):122–128. doi: 10.1021/bm700886b

Table 1.

Swelling, Mechanical, and Adhesive Properties of Hydrogels, Formed by vapor Phase Solvent Exchange from DMSO Solutions with Initial Polymer Weight Fractions, w_i^a

sample	w_i	pH	w_p	G (kPa)	σ_p (kPa)	G_c (mJ/m²)
DOPA00	0.1	6.0	0,031	0.7 ± 0,3	0,85 ± 0,12	210 ± 180
DOPA00	0.1	7.4	0.013	0.4 ± 0.1	0,40 ± 0.27	65 ± 50
DOPA00	0.1	10.0	0.013	0.4 ± 0.1	0.80 ± 0.1	200 ± 140
DOPA20	0.1	6.0	0.045	0.33 ± 0.02	3.3 ± 0.3	2100 ± 140
DOPA20	0.1	7.4	0.035	0.20 ± 0.02	2.5 ± 0.2	1780 ± 100
DOPA20	0.1	10.0	0.04	0.24 ± 0.02	0.82 ± 0.34	290 ± 40
DOPA20-OX	0.1	7.4	0.05	0.3 ± 0.03	0.68 ± 0.14	125 ± 42
DOPA20-OX	0.1	10.0	0.09	1.1 ± 0.04	0.085 ± 0.04	2.8 ± 1
DOPA40	0.2	10.0	0.08	0.24	0.62 ± 0.14	100 ± 40

Here, w_p is the equilibrium polymer volume fraction after immersion in the buffer solution, G is the shear modulus of the equilibrated gel, and G_c is the critical energy release rate describing the strength of the gel/TiO₂ interface after a contact time of 20 min. The mean and standard deviation are included for each measurement, with two or three replications in each case.