Synthesis and properties of highly hydrophilic polyurethane based on diisocyanate with ether group

Abstract

Highly hydropihilic polyurethane elastomers (PUEs) were synthesized from 1,2-bis(isocyanate) ethoxyethane (TEGDI), poly(ethylene oxide-co-propylene oxide) copolyol (EOPO) and 1,4-butane diol/1,1,1-trimethylol propane (75/25)(wt/wt) by a prepolymer method. 4,4'-diphenylmethane diisocyanate (MDI)-based PUEs were synthesized as a control as well. Fourier-transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) measurement revealed that the degree of microphase separation of the TEGDI-based PUEs was much weaker than for the MDI-based PUEs. Young's modulus and elongation at break of the TEGDI-based PUE were quite lower and larger than for the MDI-based PUEs, respectively. This is due to quite weak cohesion force of the hard segment chains in the TEGDI-based PUEs. The degree of swelling of the TEGDI-based PUEs was five times larger than for the MDI-based one. This is associated with the hydrophilic nature of TEGDI and weak cohesion force in the TEGDI-based PUEs.

Synthesis and Characterization of Inulin-Based Responsive Polyurethanes for Breast Cancer Applications

“…However, when the concentration of inulin in the reaction is close to 66% (sample PU-INU66, Figure 6b), it is obtained a hydrophobic polyurethane due to the cross-linking caused by a higher concentration of non-bonded inulin (free inulin), within the structure of the polyurethane material PU-INU66. For the samples with relatively low inulin content (PU-INU33 and PU-INU50) it is observed that both have a similar mechanic and thermic properties compared to a hydrophilic polyurethane synthesized with PCL-diol or even as a polyurethane-based on diisocyanate with ether group such as poly(oxyethylene) glycol [49], this due to the presence of inulin chains. These polyurethane materials can uptake water by hydrogen bonding since the molecule has available link sites in contrast with the sample with the highest inulin content (PU-INU66) which has less amount of available link sites due to the presence of more free inulin that could also hydrolyze and make the structure unstable [60][61][62][63][64].…”

“…The results for the PU-INU degradation under specific pH and temperature conditions could be The hydrophobic/hydrophilic character of polyurethanes depends on its chemical structure and especially on the nature of physical and chemical interactions between urethane moieties from polar hard segments and polyol soft segments, where hydrogen bonds are predominant [45][46][47][48][49]. Therefore, it was expected that PU-INUs will exhibit hydrophilic properties, like when a hydrophilic chain extender is incorporated into the synthesis.…”

Castor Oil Based Polyurethanes: Synthesis and Characterization

“…As such, this type of PEU can be used as biomaterials, filter membranes, biosensors, water permeable materials, etc. [5], [6].…”

Wettability transition of plasma-treated polystyrene micro/nano pillars-aligned patterns

“…Generally, the wettability of a solid surface is mainly caused by the chemical composition and structure asperities, which depend on surface energy and geometric structure [7]. To obtain hydrophobic polymer surfaces, coating with low surface energy materials such as fluoroalkylsilane can be helpful [8][9][10][11][12]. On the other hand, geometric structures including rough structures and regular micro/nano patterns are also crucial [13,14].…”