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. Author manuscript; available in PMC: 2018 May 31.
Published in final edited form as: ACS Appl Mater Interfaces. 2017 Jun 29;9(27):22160–22175. doi: 10.1021/acsami.7b04428

Figure 3.

Figure 3

Adhesion forces of the Sundew-inspired hydrogels with different component ratios via orthogonal experimental design. (A,B) Adhesion forces of hydrogels measured by a conical tip in L25(53) orthogonal experiments. (C,D) Adhesion forces of hydrogels measured by a spherical tip. (C) Adhesion forces of four hydrogels. (D) Adhesion forces of the hydrogels in L9(33) orthogonal experiments. (i) Histograms of adhesion forces in orthogonal experiments. (ii) Average adhesion forces for the different levels of each component in orthogonal experiments. (iii) Importance factors of each component in the orthogonal experiments. Importance factors indicate the importance of the three components in determining the adhesion force of the hydrogels. (E) Adhesion forces of the mucilage secreted by Sundew.