Preparation and Properties of Polydimethylsiloxane (PDMS)/Polyethylene Glycol (PEG)-Based Amphiphilic Polyurethane Elastomers

Abstract

Amphiphilic polyurethane elastomers (APUE) were synthesized using a two-step polyaddition reaction based on the hydroxyl-terminated polydimethylsiloxane (PDMS) and polyethylene glycol (PEG) soft segments with the molecular weights (M w 's) of 2000 and 1000, respectively. The effects of the PDMS/PEG contents on the properties and structures of the APUE were investigated. It was found that the APUE possessed high elongation, moderate tensile strength, and good thermal properties. In addition, the APUE showed tunable oxygen permeability (Dk) and water vapor transmission rate (WVTR), and a similar WVTR to that of skin could be obtained for the optimized sample (APUE2). Importantly, APUE also exhibited excellent antibacterial efficacy against two kinds of bacteria along with impressive cytocompatibility. All of the results demonstrated that the synthesized APUE will hold substantial potential for biomaterial applications.

Thermoresponsive Polyurethane Sponges with Temperature-Controlled Superwettability for Oil/Water Separation

“…For the PU-ViTS sponge (Figure b), the FTIR absorption peaks at 3061 and 3026 cm –1 are attributed to the asymmetric and symmetric stretching vibrations, respectively. The absorption peak at 1600 cm –1 is due to the existence of the CC bonds, and the absorption peak at 1408 cm –1 can be assigned to the plane shear motion of CHCH 2 . , The absorption peaks indexed to Si–O–Si and Si–O–C can be noted at 1061 and 1001 cm –1 . , These FTIR spectra-based attributions indicate that the polysiloxane with CC was formed on the surface of the sponge. In PU-PNIPAAm spectrum (Figure c).…”

“…53,54 The absorption peaks indexed to Si−O−Si and Si−O−C can be noted at 1061 and 1001 cm −1 . 55,56 These FTIR spectra-based attributions indicate that the polysiloxane with CC was formed on the surface of the sponge. In PU-PNIPAAm spectrum (Figure 2c).…”

A Robust Superhydrophobic Polyurethane Sponge Loaded with Multi-Walled Carbon Nanotubes for Efficient and Selective Oil-Water Separation

“…For instance, the FT-IR spectrum of the OTS-CNTs/PU sponges showed four additional absorption peaks at 2923, 2849, 1470 and 719 cm −1 , corresponding to the stretching vibration and bending vibration of the long-chain alkyl methylene C−H [38]. Additionally, the adsorption band at 1112 and 1057 cm −1 were ascribed to Si−O−Si and Si−O−C, respectively [37,39]. The FT-IR spectra of other coupling agent-CNTs/PU sponges had similar peaks, indicating that the hydroxyl groups reacted with the coupling agents.…”

Are Nano TiO2 Inclusions Improving Biocompatibility of Photocurable Polydimethylsiloxane for Maxillofacial Prosthesis Manufacturing?

“…Polydimethylsiloxane (PDMS) is presently the first option as material for soft maxillofacial prosthesis production due to its versatility, soft-tissue-like properties, ease of manipulation, chemical inertness, durability, and good biocompatibility. Moreover, PDMS presents a few other desirable characteristics such as hydrophobicity, thermal stability, low reactivity, resistance to ozone, and UV radiation due to the particular polymeric backbone with Si-O-Si bonds [4]. Its structural features transform PDMS into a structure with a highly flexible backbone (Figure 1), formed by the large Si atoms and oxygen atoms with smaller size connected through a 1.65 Å bound.…”