Stretchable calix[4]arene‐based gels by induction of water

Abstract

This study focused on controlling the stretching property of gels. This resilience is dependent on the water content in the calix [4]arene-based gel solvent system, where the stretching property of gels could be controlled upon the addition of water. The storage (G 0 ) and loss (G 00 ) moduli of the calix[4] arene-based gels prepared in solvent systems with different water contents were investigated via rheological measurements. By the strain sweeps, the values of G 0 decreased, while tan-delta increased with water content in the solvent system. In addition, a significant changes in the G 0 and G 00 values were observed upon the addition of water by frequency sweeps. In particular, the decrease in the G 00 value of the gel prepared from the 1,3-alternated calix [4] arene derivative (HC4) and diisocyanate linker (HDI) in DMSO/H 2 O mixed solvent (8:2 v/v) was approximately 5-fold larger than that of the gel prepared in 100% DMSO. Thus, this novel approach would useful for the development of new soft materials with finely controllable mechanical properties.

Effect of surface‐modified nano‐aluminum trihydroxide on electrical properties of silicone/nano‐silica nanocomposite

“…To measure the weight ratio of HMDS coupling agent on the surface of nano‐SiO 2 particles, TGA was carried out and it was found that 3.9 wt% of HMDS was attached on the nano‐SiO 2 surfaces, as reported in our previous study 20 . To measure the weight ratio of DVTMDS coupling agent on the surface of nano‐ATH particles, TGA analysis was also carried out, as displayed in Figure 3.…”