Highly efficient polyurethane membrane based on nanocomposite of sulfonated thiacalix[4]arene-sodium alginate for desalination

Waterborne polyurethane nanocomposite incorporated with phytic acid intercalated layered double hydroxides: A highly stable aqueous dispersion with desired corrosion protection capability

“…The PU degradation occurs in two main steps. The first step which is attributed to the decomposition of the hard segments occurs from 200 to 350°C, while the second step takes place from 350 to 500°C and is related to the decomposition of soft segments 41 . In comparison with the neat WPU sample with T 10% at 309°C, for WPU/LDH and WPU/PA‐LDHs nanocomposites, T 10% shifted to 300 and 228°C, respectively.…”

“…The first step which is attributed to the decomposition of the hard segments occurs from 200 to 350 C, while the second step takes place from 350 to 500 C and is related to the decomposition of soft segments. 41 42 Moreover, the drastic decrease in T 10% of WPU/PA-LDH nanocomposite film probably results from the higher tendency of well-dispersed and hydrophilic PA-LDH nanosheets to interact with polar hard segments compared to unmodified LDH.…”

Preparation and Characterization of a Silk Fibroin/Polyurethane Fiber Blend Membrane Containing Actinomycin X2 with Excellent Mechanical Properties and Enhanced Antibacterial Activities

“…[11] In the spectrum of 100 % PUF membrane, the characteristic peaks were at 2938 cm À 1 , 2854 cm À 1 and 1108 cm À 1 , which could be assigned to CÀ H symmetric and asymmetric stretching vibration and CÀ OÀ C tensile vibration, respectively. [26][27][28] In the spectrum of the SF/PUF blend membranes (75/25, 50/50, 25/75 SF/PUF), the NÀ H stretching vibration at 3288 cm À 1 could be seen, as well as the two peaks of SF and PUF were overlapped; other characteristic peaks of SF and PUF increased as their respective content increased, such as the peak intensity of SF amide I corresponding to 1630 cm À 1 gradually increased with the increase of SF. If there were specific interactions, such as strong hydrogen bonds between SF and PUF, peak shifts or new peaks would have appeared.…”