The preparation of novel polyvinyl alcohol (PVA)-based nanoparticle/carbon nanotubes (PNP/CNTs) aerogel for solvents adsorption application

A simple and green strategy for preparing poly(vinyl alcohol)/phosphate cellulose aerogel with enhanced flame‐retardant properties

“…They have been widely used in the fields of aerospace and environmental and construction engineering. [10][11][12] In recent years, PVA aerogels have become popular because of their biocompatibility, high hydrophilicity, nontoxicity, and excellent mechanical strength. Zhang et al [13] prepared PVA aerogels that can be used for solvent adsorption, which were based on modified PVA and carbon nanotubes.…”

Gradual hydrophobization of silica aerogel for controlled drug release

“…Solid-state NMR spectra were acquired using a 500 MHz Bruker Avance II spectrometer with a 4 mm CP-MAS probe with a spinning rate of 12 500 Hz. The contact times for cross polarization were 2 ms for 13 C and 8 ms for 29 Si. Aerogel samples were rmly compressed into a zirconia rotor for the NMR measurements.…”

“…Aerogel samples were rmly compressed into a zirconia rotor for the NMR measurements. In the case of 29 Si NMR, integration areas of Q species were found by dividing the broad signal around À120 to À90 ppm to three; Q 2 area was below 95 ppm, Q 4 area above 108 ppm and Q 3 in between. For contact angle measurements, a layer of aerogel powder was adhered to a glass slide using double-sided tape.…”

“…Potentially, gas-phase silylation can enable absolute control over reaction parameters, such as silylation agent pressure, duration and temperature, all while keeping the original aerogel structure intact. It is therefore surprising that only a handful reports on gas-phase silylation of aerogels exist, 4,[26][27][28][29] and none demonstrate the ability to tune the hydrophobic degree gradually.…”

Thermal Investigations on Carbon Nanotubes by Spectroscopic Techniques

“…The Raman spectrum of pure CNTs has several characteristic bands such as the D band at 1300 cm −1 which can be attributed to the presence of defects in the structure of the CNTs, and the G band at 1575 cm −1 which originated from tangential vibration modes of the bonds in carbon atoms with sp 2 hybridization. The D and G bands are typical Raman peaks of CNTs and the peak at 2668 cm −1 represents the 2D band of carbon nanotubes (CNTs) [79,80]. The G band at 1575 cm −1 represents the phase vibration of the graphite lattice and the D band at about 1300 cm −1 is related to the disorder of the graphite edges.…”