Tensile tests were carried out on patches with 6 × 6 repeat units in both 1- and 2-directions of the patch (directions annotated in Figure 1A ). Precise length and width measurements were known from the fabrication technique. Thickness was determined by scanning electron microscopy, operated at 10 kV (Figure S6, Supporting Information , 29.12 ± 6.8 μm, N = 3, n = 5). Patches were wetted with deionized water and mounted using custom made stainless steel grips on an Electroforce 3200 mechanical tester with a 250 g load cell (TA Instruments, New Castle, DE) controlled by WinTest software (Ver. 7). Patches were strained to failure at a rate of 0.1% strain s−1, assuming quasi-static loading. The effective stiffnesses (E) were determined by taking the slope of a regression within the initial linear region of the stress–strain curve up to 10% strain. The anisotropic ratio of effective stiffnesses (E1/E2) was calculated by dividing the mean of E1 (N = 10) by the mean of E2 (N = 10). UTS was measured as the maximum stress reached and the strain-at-failure was taken as the strain at the UTS point.
250 g load cell
Manufactured by TA Instruments
The 250 g load cell is a precision measurement device designed to accurately measure forces up to 250 grams. It converts a force applied to its surface into an electrical signal that can be processed and displayed by compatible measurement equipment.
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Lab products found in correlation
2 protocols using 250 g load cell
1
Tensile Characterization of Biomimetic Patches
2
Tensile Characterization of Biomimetic Patches
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Tensile tests were carried out on patches with 6 × 6 repeat units in both 1- and 2-directions of the patch (directions annotated in Figure 1A ). Precise length and width measurements were known from the fabrication technique. Thickness was determined by scanning electron microscopy, operated at 10 kV (Figure S6, Supporting Information , 29.12 ± 6.8 μm, N = 3, n = 5). Patches were wetted with deionized water and mounted using custom made stainless steel grips on an Electroforce 3200 mechanical tester with a 250 g load cell (TA Instruments, New Castle, DE) controlled by WinTest software (Ver. 7). Patches were strained to failure at a rate of 0.1% strain s−1, assuming quasi-static loading. The effective stiffnesses (E) were determined by taking the slope of a regression within the initial linear region of the stress–strain curve up to 10% strain. The anisotropic ratio of effective stiffnesses (E1/E2) was calculated by dividing the mean of E1 (N = 10) by the mean of E2 (N = 10). UTS was measured as the maximum stress reached and the strain-at-failure was taken as the strain at the UTS point.
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