ABSTRACT We report a systematic investigation on the structure–property relationships in glycerol‐plasticized poly(vinyl alcohol) (PVA)/cassava starch blends prepared via solution casting. In particular, PVA mixed with native, low‐oxidized, high‐oxidized, and pregelatinized cassava starches were characterized by means of SEM, XRD, FTIR, thermal analysis mechanical testing immiscible systems received. Burial tests over period several days suggested preferential degradation glycerol component...

This study describes the fabrication of composite beads comprising chitosan and zeolitic imidazolate framework-8 (ZIF-8) as a natural biodegradable dye adsorbent support for ZnO photocatalyst.

As a result of the growth industrialization and urbanization, water ecosystem is contaminated by various pollutants, including heavy metal ions dyes. The use low-cost environmentally friendly dye adsorbents has been investigated. A hydrogel was fabricated via graft polymerization acrylic acid (AA) 2-acrylamido-2-methyl-1-propanesulfonic (AMPS) onto chitosan. used as adsorbent support for zinc oxide (ZnO) powder photocatalyst. adsorption capacity bare greater towards cationic dyes than...

ABSTRACT Tough biodegradable films were prepared using a poly(vinyl alcohol) (PVA)/poly(vinyl pyrrolidone) (PVP) (1:1) blend with plasticizers of glycerol (GLY), sorbitol (SOR), and their (one to one) mixture. We studied the effect plasticization on structural, thermal, mechanical properties PVA/PVP films. Fourier transform infrared spectra indicated good miscibility two components due H‐bonding between PVA PVP molecules. The addition reduced interaction PVP, evidenced by an increase in...

ABSTRACT Rubber wood sawdust (RWS) was used as a reinforcement for wheat gluten based bioplastics. The RWS content varied from 0, 5, 10, 15–20 wt %. Effects of the on morphology, water absorption, mechanical, thermal, and biodegradation properties bioplastic were investigated. An addition caused an improvement tensile strength resistance Scanning electron micrograph gluten/RWS composites with 10 % revealed good dispersion uniform embedding within matrix. Agglomeration observed when loads...

Abstract Industrial expansion has increased the discharge of contaminated wastewater. Wastewater can be treated by adsorption with petroleum‐based hydrogels but materials are not biodegradable and therefore cause secondary toxic waste. In this work, hydrogel composites prepared based on non‐biodegradable polyacrylamide cassava starch (CS) poly(vinyl alcohol). The effect CS content porous structure is studied. highest water absorption capacity 74 g −1 obtained from a 30 wt% CS. Within 4 h,...

The synthesis of high‐aspect‐ratio (AR) CdSe (NRs) nanorods and their ordered assembly over large areas are reported. Long‐range ordering hexagonal arrays high‐AR NRs is achieved by a combination controlled solvent evaporation the use an applied electric field. Vertically oriented assemblies functionalized with oligo‐ polythiophene also obtained. Aligned have potential applications in organic–inorganic hybrid bulk‐heterojunction photovoltaic devices. image

Abstract A series of blend films comprised 88% hydrolyzed poly(vinyl alcohol) (PVA) with native cassava starch (NCS), high‐oxidized (HCS), and pre‐gelatinized (PCS) was prepared via solution casting. The blends were plasticized glycerol or glycerol‐sorbitol mixture. structure each film characterized by Fourier‐transform infrared spectroscopy X‐ray diffraction analysis. Cross‐sections the PVA/HCS PVA/PCS films, imaged scanning electron microscopy, indicated a PVA‐rich/starch‐rich bilayer...

Superabsorbent core–shell particles were synthesized via a two‐step process. A silica core was prepared by co‐condensation of tetraethyl orthosilicate and vinyl triethoxysilane. The vinyl‐functionalized then polymerized with acrylamide monomer free‐radical polymerization to yield silica‐polyacrylamide (PAM) hybrid particles. crosslinking density porosity PAM on the controlled adjusting concentration crosslinker, n,n ′‐methylenebisacrylamide (MBA). structure confirmed scanning transmission...

Ultrahydrophobic mesoporous silica nanoparticles (MSNPs) were prepared using a simple one-pot synthesis. A template of polystyrene (PS) was simultaneously synthesized during condensation tetraethyl orthosilicate (TEOS). Co-condensation TEOS with trimethyl (fluoromethyl) silane provided core–shell MSNPs low surface energies. The structure after the removal PS confirmed by transmission electron microscopy and Brunauer–Emmett–Teller method. Coated on substrates, these fluorinated showed...

Abstract A novel biodegradable interpenetrating polymer network hydrogel impregnated with a plant extract was designed using simple one‐pot free radical polymerization of polyacrylamide (PAM), poly(vinyl alcohol) (PVA) and gelatin (Gel). PAM/PVA/Gel hydrogels different Gel contents (Gel‐0–Gel‐40) reached maximum water absorbency 1443%, which approximately three times greater than PAM hydrogel. Biocompatibility assessment all on L929 fibroblast cells demonstrated no toxicity. Gel‐10 1120%...