The cover image by Muhammad Bilal and colleagues shows an SEM micrograph representing the fractured surface of clay reinforce sulfonated polyimide nanocomposite. The SPI membrane characterizes a homogenous morphology throughout the matrix due to the uniform distribution of clay nanoparticles with no pore or cracks. The uniform distribution and proper dispersion of nanofillers are due to the functionalization of vermiculite clay, as the NH₂ group of 3-APTES makes contact through covalent linkage with the SO₃H group of SPIs matrix. However, these linkages between organicinorganic moieties might affect the properties of composites film. DOI: 10.1002/app.51310

GO/PA-NF membranes have excellent separation performance of salt and dye molecules for high-salt dye wastewater.

The PAM/CNC-g-PVP nanocomposite hydrogels were hybrid crosslinked by covalent bonds and robust cooperative hydrogen bonds. The cooperative hydrogen bonds can rupture to dissipate energy upon deformation and recover instantly on the removal of stress in the elastic PAM matrix, leading to low hysteresis, high toughness, and resilience of the hydrogels.

The investigation of the process of complexation and decomplexation of polyamide demonstrates great potential as sustainable green approach in the separation and recovery of polyamide fiber from polyamide containing mixed textile waste. The nondestructive approach is based on the selective dissolution of polyamide fibers by the complexation using mixtures of calcium chloride, ethanol, and water, followed by the decomplexation and recovery of nondegraded polyamide by removing calcium ions through rinsing with water.

Polymer composites based on polyvinyl alcohol and metal oxides (AlOOH, CuO, and ZnO) were obtained by a new one-stage method using underwater plasma. Metal oxides are formed in the plasma zone and are incorporated during the plasma treatment. The composites obtained show nonlinear current–voltage characteristics and have a high dielectric constant.

Polymer blends containing nanoparticles, which generally have better properties attributed to good dispersions, can exhibit the opposite behavior when there is low miscibility between the phases. In this case, nanoparticles that are poorly distributed, but can be arranged in a layer between the phases, can reduce the surface stress of the mixture and improve its thermal and thermomechanical properties.

Phenolic hydroxyl, a free radical trap on macromolecular antioxidant PCN and PPN, reacts with peroxy radical or alkoxy radical generated by PA6 amide group due to thermal oxidative aging, which is consumed to form a stable compound, so that the reaction that free radical takes hydrogen to break the molecular chain can not continue, thus protecting the polymer chain from such free radicals and delaying the thermal oxidative aging of nylon.

We focus on the effectual features of interphase net using clay properties and interphase/interfacial factors to progress the Takayanagi model for the modulus of clay-reinforced systems. The effectual loading of interphase district in the samples and the percolation onset define the portion of interphase area in the net. The forecasts of the model are associated to the experiential quantities of several examples and the roles of whole factors in the modulus are justified.

By the wet-spinning method, the co-PI fiber with excellent mechanical and dielectric properties was obtained in the present work, which exhibited a tensile strength of 2.61 GPa and modulus of 86.7 Gpa as well as a low dielectric constant and a dielectric loss factor of 2.7463 and 0.00793 at 10 GHz, respectively. The correlation between properties and the microstructure of co-PI fibers revealed that the hydrogen-bond associations and the microvoids structure were highly affected by imidization conditions.

In this paper, a two-step autocatalytic deposition method was adopted to prepare the Ag/PVC composite film with high reflectivity. First, the PVC surface was introduced palladium (Pd) to provide a catalytic center for deposition. Then, Ag particles were deposited on the treated PVC film surface. Pd metal was introduced as the catalytic center for Ag deposition to promote the formation of face-centered cubic crystals, thereby obtaining a highly reflective PVC film.

Polydiacetylene (PDA) systems, which showed color changes due to the permeation of target molecules, were studied. The relationship of the color change to the permeation time of the PDA vesicle was characterized. The color change rate can be controlled by changing the assistant surfactant.

The 3D structure of sintered silver based polymer composites for thermoconductive EMI shielding materials.