The present work involves fabrication of PNIPAM-based terpolymeric hydrogel magnetite (Fe2O3) composite, i.e. ferrogels by coprecipitation method. The effects of Fe2O3 particles on the properties of resulting hydrogels were examined in terms of swelling studies at different temperatures, deswelling kinetics, mechanical and separation behaviour. The ferrogels were found to have higher equilibrium swelling

This erratum corrects the legends of Figure 3 (Inset) of the published paper. The results presented in the published paper are correct and are not affected by the change in legends of Figure 3 (inset).

The study focused on the performance enhancement of a PDMS membrane using PMHS as the curing agent, and by incorporation of silica nanoparticles with four different silica contents of 2.5, 5, 7.5 and 10 wt%. The membranes were synthesized and applied as the separation elements to improve the separation of DMSO from their aqueous solutions. The properties of the membranes were studied by attenuated

Cellulose acetate (CA) fibers were obtained by electrospinning and their properties analyzed by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction (XRD), differential scanning calorimeter (DSC) and thermogravimetric analysis. The effect of the polymer concentration on crystallinity and fiber diameter of the obtained material was studied by DSC. The application

Both pyrogallol-furfurylamine-based and pyrogallol-aniline-based di-benzoxazines (PG-FA and PG-A) possess a free hydroxyl and latent catalytic characteristics. To decrease the ring-opening polymerization (ROP) temperature of benzoxazine based on phenol and 4,4′-diaminodiphenylmethane (P-DDM) and increase simultaneously thermal property of its polymer, PG-FA and PG-A as catalysts were introduced into

Abstract Polydopamine (PDA) has been found to be as functional materials in a wide range of applications. However, the degradation behavior and mechanism of PDA are still in debate. For well understanding the degradation, PDA nanoparticles (PDA NPs) were prepared by oxidation and self-polymerization of dopamine and employed to study the degradation properties. We systematically studied the degradation

Propylation of cellulose from different sources with propionic anhydride using N-iodosuccinimide (NIS) under solvent-free condition was tested. It was done in the presence of NIS as a new catalyst for propylation using three different amounts of catalyst under mild reaction conditions. The degree of substitution by propionate was experimentally calculated and confirmed by FTIR and 1H NMR analyses.

In the present study, bio-functional edible films were developed by incorporating different concentrations (0, 3, 6, 9, 12, and 15%) of orange peel powder (OPP) into the gelatin. The thickness, moisture content, and water vapor permeability of the gelatin films enhanced as the content of incorporated OPP increased. OPP-incorporated films showed lower L* value, but higher a*, b*, and opacity values

Abstract Ethylene/1-hexene copolymerization was carried out with a new Ti (IV) complexes stabilized by fluorinated 2-hydroxymethylphenol derivatives and activated by MAO-free binary cocatalysts—{alkyl aluminum chloride + Bu2Mg}. Structures and properties of the obtained copolymers were measured by DSC, GPC and 13C NMR. The effects of the ligand structure and the nature of organoaluminum activator on

Chitosan-based glycerol-plasticized membranes were prepared aiming to develop low-cost and biocompatible material for wound dressing. They were produced by casting/solvent evaporation, and their formation mechanisms were attributed to intra- and inter-hydrogen bonds between materials. The results show that the glycerol acted as plasticizer and changed the proliferation of fibroblast cells on chitosan

A flame-retardant jute/PP composite with excellent flame retarding and mechanical properties was prepared by the surface powder spraying process. The flame-retardant layer used the green and pollution-free β-cyclodextrin as a char agent. To improve the char forming ability of β-cyclodextrin, ammonium polyphosphate (APP) and melamine (MEL) were also used as acid source and a blowing agent, respectively

In the present work, a high thermal and flame-retardant polybenzoxazine-silica hybrid material has been synthesized using renewable raw materials (including eugenol and furfurylamine) via a greener sol–gel-based approach. Inorganic component tetraethoxysilane (TEOS) was introduced into eugenol benzoxazine (BZ–E–F) with the help of (3-mercaptopropyl) trimethoxysilane (MPTMS) as a coupling agent viz

Semi-interpenetrating polymer network (sIPN) proton exchange membranes are prepared from sulfonated polyimides (SPIs) and cross-linkable sulfonated poly(arylene ether)s (SPAEs) with 3,3′-diaminobenzidine (DAB) as cross-linker. The cyclocondensation between DAB and benzyl moiety in SPAEs results in a covalently cross-linked SPAE networks where SPIs can be immobilized by interlocking; meanwhile, the

The effect of pyridine (Pyr) on the corrosion of copper in 3 wt% NaCl was investigated using potentiodynamical anodic polarization, weight loss and morphological analysis. The Doehlert design simulation shows that Cpyr and immersion time are the significant factors. In addition, electrochemical measurements revealed that Pyr acts as a mixed-type inhibitor with more pronounced effect on anodic domain

Abstract Surface modification of carbon nanotubes is a common method to improve their compatibility with polymer matrix in membranes. In this study, polyethersulfone (PES) nanocomposite membranes were prepared by incorporation of modified multi-walled carbon nanotubes (MWCNT). For this purpose, diallyldimethylammonium chloride was used as a monomer for the functionalization of carboxylated-MWCNT via

Abstract In this paper, we report on a zirconocene dichloride/modified methylaluminoxane catalyst system supported on a natural diatomite in order to provide ethylene polymerization catalysts for gas phase or slurry processes. Such natural diatomite support exhibited similar properties of silica-based molecular sieve because of their similar chemical composition and porous structure. The supported

Abstract In this paper, pH sensitive superabsorbent hydrogel (Jh-g-AM-cl-NN′MBA) was designed from unexplored natural exudate of Lannea coromandelica (Houtt.) known as Jhingan gum or Odina gum or Jeol gum. The synthesized adsorbent was characterized by analytical techniques. Swelling studies carried out at different pH and temperature indicted that the hydrogel swelled maximum in alkaline and at high

The present day environmental issues demand a lot from scientists and engineers to keep the planet earth safe for its habitats. There were lot of attempts for developing efficient air and liquid filters as the demand increases with an utmost concern of present environmental situations. Thanks to its large surface area to volume ratio, polymer nanofibers and composites are found to be good substitute

Nanocomposite (NC) films based on biopolymer gelatin incorporated with varying amounts of K-doped zirconate (K2ZrO3) nanoparticles (NPs) have been fabricated by solution intercalation technique. NPs obtained by combustion method and their TEM result revealed the average size of NPs is 18 nm ± 2. The effects of NPs content on structural and morphological behaviors of gelatin nanocomposite (NCs) have

In this paper, the effect of embedded shape memory alloy (SMA) wires on the mechanical behavior of glass fiber-epoxy polymer composite reinforced with graphene nanoplatelets (GnPs) was studied. Composites with different GnPs contents, SMA wires number and pre-strain levels were prepared by hand lay-up method. Then, the composite samples were subjected to the bending tests to evaluate the bending strength

Ever-degrading environment due to the application of a large amount of agrochemicals, like fertilizers into the soil, has raised the concern for implementing such measures which would not only reduce the chemical incorporation into the soil, but will also benefit the crops by shooting up the fertilizer utilization by the same. Henceforth, biodegradable formulations for phosphate are essentially required

In this study, a macroinitiator of β-CD-ONa was prepared by a substitution reaction of β-cyclodextrin (β-CD) with sodium (Na). The macroinitiator was then used in the ring-opening polymerization of octamethylcyclotetrasiloxane (D4) to obtain a star polymer, in which β-CD is the core and polysiloxane is the arm. FTIR, NMR, TGA, CA, etc., were used to characterize the structure and properties of star

Poly(methyl methacrylate) (PMMA)/clay nanocomposites (NCs) were prepared by suspension polymerization of methyl methacrylate in the presence of two different organoclays (Cloisite 30B, Cloisite 15A) with clay loading ranged from 0.5 to 5 wt%. Increase in molecular weight of the PMMA matrix with addition of the clay was revealed by gel permeation chromatography (GPC) and intrinsic viscosity measurements

The double-sensitive graft copolymers of sodium salt of carboxymethyl cellulose (Na-CMC) and N,N-dimethylaminoethyl methacrylate (DMAEMA) with different content are successfully synthesized by radical polymerization applying a redox initiator. Aqueous solution of the synthesized copolymers has a lower critical solution temperature (LCST) in the range of 37–44 °C, and the sizes of copolymer particles

Abstract Galactomannans are polysaccharides commercially used in foods as gelling agents, thickeners, and stabilizers. In this study, a galactomannan partially hydrolyzed from Adenanthera pavonina seeds was used as stabilizer, fat substitute, and source of dietary fibers in a mousse milk dessert. First, characterizations of intact (GM) and partially hydrolyzed (GMPH) galactomannan from A. pavonina

In order to synthesize dynamic amphiphilic hydrogels, in the first step, dibenzaldehyde-terminated telechelic poly(ethylene glycol) (PEG-DA) was synthesized via simple one-pot method by using hexamethylene diisocyanate and para-hydroxybenzaldehyde. In the second step, 4-arm star-shaped polycaprolactone tetraaldehyde (4sPCL-TA) was synthesized in three steps. All of the synthesized prepolymers and functionalization

Abstract In the present study, silver nanoparticles (AgNPs) were synthesized using Prunus avium gum extract and their physicochemical properties together with antibacterial and cytotoxic effects were evaluated. The characterization of these AgNPs was performed by UV–vis spectroscopy, transmission electron microscopy, scanning electron microscopy, and Fourier transforms infrared spectroscopy. The bio-performance

This erratum corrects the Fig. 3a, d of the published paper.

Polysiloxanes have been found to be the most important and commercial family of synthetic inorganic polymers. The unique structure of the siloxane bond provides them with unusual features such as a high bond angle, nearly inexistent torsional barrier and a semi-ionic character due to the difference of electronegativities between the silicon and oxygen atoms. Also, silicon-based polymers have been used

In the present study, a Schiff’s base polymer (SBP) has been synthesized by the condensation of trifluoroacetylacetone and amino-polystyrene copolymer resin. After the characterization of synthesized polymer by FT-IR spectroscopy, thermal and elemental analyses, the removal of 2-chlorophenol (2-CP), 2,4-dichlorophenol (2,4-DCP) along with phenol is optimized using response surface methodology. Eighteen

Firstly, poly[4-(4-vinylbenzyl)oxy)phthalonitrile]-co-styrene, [poly(VBOP-co-St], which is used as a linear copolymer precursor containing phthalonitrile pendant group was prepared from copolymerization of VBOP and St by atom transfer radical polymerization method at 110 °C. Then, complex synthesis of cobalt phthalocyanine in the single-chain polymer (SCP-CoPc complex) via the intramolecular macrocyclization

Abstract The current study represents the modification of the side-chain functionality of kafirin to prepare amide and ester derivatives. To explore the effect of the pendant group on kafirin protein, the derivatives were subjected to film formation by compression molding. Mechanical and thermal behaviors of these films were investigated. FTIR and NMR confirmed the formation of amide and ester derivatives

Abstract Depletion of the petroleum resources and poor flame-retardant properties of the epoxy resins drive researchers to develop an epoxy resin with good heat stability from bio-resources. In the current research work, we have reported the synthesis of a novel crosslinking agent for epoxy from the catechol as a bio-resource which can be further modified to form epoxy resin as well. The synthesis

The structural complexity of human knee meniscus warrants a suitable 3D microenvironment for its successful regeneration. For this, 3D porous poly-ε-caprolactone (PCL) scaffold structures were prepared using freeze drying method (lyophilization). PCL was dissolved in different weight percentages (10, 15, 20% w/v, coded as P10, P15 and P20, respectively) in acetone and lyophilized to develop 3D porous

Poly(l-lactic acid)-poly(ethylene glycol)-poly(l-lactic acid) triblock copolymer (PLLA-PEG-PLLA) prepared by simple esterification of l-lactic acid (l-LA) and diol-polyethylene glycol (diol-PEG) is proposed as an effective plasticizer for poly(lactide) film (PLA). Differential scanning calorimetry and X-ray diffraction analyses reveal improvement in PLA/PLLA-PEG-PLLA blend miscibility without PEG segment

Natural rubber (NR) grafted by methyl methacrylate (MMA) was used to produce bio-based wood adhesive. The effect of total solid content (%TSC) at 55, 57, and 60%, represented as 55NR-g-MMA, 57NR-g-MMA, and 60NR-g-MMA, respectively, and the effect of storage time on lap shear strength were investigated. It was found that contact angle sharply decreased from 95° for NR to approximately 65° for all of

Preparation of associating multiblock copolymer electrolytes mediated by radical addition–fragmentation chain transfer (RAFT) technique has been evaluated and reported in this investigation. The synthesization of copolymers was performed at room temperature in 1,4-dioxane using redox catalyst: tert-butyl hydroperoxide and ascorbic acid as initiator. The copolymers are composed of a large hydrophilic

Abstract In this work, reduced graphene oxide (rGO) was obtained by chemical reduction of graphene oxide (GO) using sodium borohydride (NaBH4). Four different nanocomposites rGO/ruthenium oxide (RuO2), rGO/polyaniline (PANI), RuO2/PANI and rGO/RuO2/PANI were chemically synthesized. In addition, PANI-based nanocomposites were synthesized by in situ polymerization technique. Nanocomposites were examined

Waterborne fluorinated polyurethane–acrylate hybrid emulsion modified by long aliphatic chains (WFPUA) is prepared by two steps, which include that the stearyl alcohol (SA)-blocked (end-capped) polyurethanes (SPU) are carried out in the mixtures of vinyl monomers, and then, the WFPUA is prepared via the free radical polymerization after the pre-emulsification of the said system. The characteristic

This work was aimed at understanding the influence of fibrillar morphology on melt viscoelastic properties of polymer blends containing various blend ratios (polypropylene/polytrimethylene terephthalate: 99/1, 94/6, 90/10, 80/20). The blends were processed on co-rotating twin-screw extruder, and fiber spinning was employed as a post-processing method. Scanning electron microscopy was used to analyze

Binary mixtures of anionic double-chain sulfonate emulsifiers, sodium di-isodecyl sulfosuccinate and sodium pentadecan-sulfonate (SPS) were employed in batch reactor at different combination ratios and concentration for vinyl chloride emulsion polymerization. Reaction performances were evaluated by monitoring conversion rate and molecular weight by K-value parameter. Particle size and its distribution

The effect of the polymeric cross-link density on the thermal conductivity of an oxidized graphene (OG)-filled epoxy nanocomposite was investigated by two different fabrication methods, namely a conventional OG mixing (OGconventional) and a diamine–colloidized OG (OGcolloidized) method. Epoxy composites with 3 wt% OG were prepared via the diamine–OG fabrication method to produce an epoxy nanocomposite

Abstract In this study, two donor–acceptor (D–A)-type conjugated polymers, namely PQSeCz and PQSeFl, were designed and synthesized. Selenophene was incorporated as the π-bridge and quinoxaline as an acceptor unit, while carbazole and fluorene were used as the donor units. Polymers were synthesized via palladium-catalyzed Suzuki polymerization reaction. All molecules were characterized by 1H and 13C

According to recent researches, the emulsion stability, characteristics and the particle size distribution have great importance in their ability to impart desired surface properties on treated substrates. Therefore, in this study, aminofunctional polysiloxanes are used for preparation of silicone emulsion softener stabilized by nonionic surfactants. The turbidity of proposed emulsions was investigated

Poly(amino acid) (PAA)-based nanocomposites were synthesized by in situ melting polycondensation with addition of different contents of ZnO nanoparticles (ZnO NPs); the morphology and thermal, mechanical, cytotoxicity, antibacterial and dielectric properties of the resulting nanocomposites were investigated and characterized. The nanoparticles were dispersed within the matrix without the need for coupling

2,5-Bis(4-(2-aminothiazole) phenyl)-3 and 4-diphenyltetraphenyl thiophene (TPTPThDA) are fine processed in three steps. A series of polyazomethines containing thiophene–thiazole unit have been incorporated by the polycondensation of a new diamine, i.e. TPTPThDA, with proportionate of aromatic dialdehydes. The impact of insertion of thiazole entity in the polyazomethine matrix with the azo linkages

Abstract Four laboratory types of low molecular weight polybutadiene (PBD) with different 1,2-vinyl isomer contents were selected for microstructure characterization by nuclear magnetic resonance spectroscopy (NMR). By characterization of PBD’s end groups, which is possible just in low molecular weight PBD, it was suggested which initiators and quenching reagents might had been used in PBD synthesis

The original article was published with incorrect affiliation of Prof. Ibnelwaleed Hussein as well as the project number in the acknowledgment.

This erratum corrects the Figs. 1 and 2e of the published paper. The results presented in the published paper are correct and are not affected by the change in Figures.

Abstract In this work, we successfully synthesized silver-doped polyaniline (NPANI-Ag-X; X represents I− and BF4− dopants,) by using chemical oxidation polymerization in various solvent media, which are deionized water, dimethylformamide, acetonitrile, 1,4-dioxane, tetrahydrofuran and acetone to give new features into polyaniline (PANI). Then, the solvent effects on the formation of NPANI-Ag-X were

Abstract Kenaf and luffa fibres are hydrophilic due to the presence of water sensitive constituents, which tend to form a poor compatibility when binding with polymers. Thus, the surface of fibres was modified through fungal, alkaline and heat treatment to reduce the main hydroxyl functional groups (O–H) that caused the water absorption as well as to cleave the formed hydrogen bonds that hindered the

Abstract In this work, novel polypropylene/BiSr2CaCu2O6.5 (PP/Bi-1212) thick film composites having ceramic content varying between 0.5% and 6% were prepared to enhance both the dielectric and mechanical properties of PP. The surface morphologies of the samples were determined by scanning electron microscope. The crystallinity change in PP due to Bi-1212 filler was also described by differential scanning

Abstract The purpose of this research article is to present the application possibilities of cereal straw as a functional bio-filler of elastomeric materials. The work defined the precise selection of polymeric matrixes as a base for the produced biocomposites. Applied rubbers, ethylene propylene, methylvinylsilicone, butadiene–styrene and butadiene–acrylonitrile, are materials that differ in both

Abstract In the present study, it was focused on developing mechanically stronger and thermally more stable polyvinyl chloride (PVC) composites by using green reduced graphene oxide (GRGO) filler to strengthen the negative features of PVC. For this purpose, GRGO reduced by vitamin C (ascorbic acid) with antibacterial properties was selected as filler. The PVC/GRGO composites were produced via colloidal

Abstract The fabrication of novel scaffolds was represented on the basis of conductive and biodegradable copolymers. The star-like polycaprolactone (S-PCL) was synthesized from dipentaerythritol as a core by a catalyst of Sn(oct)8 through ring-opening technique. After functionalization of S-PCL by thiophene, thiophene monomer was polymerized from polycaprolactone ends via chemical oxidation polymerization

Abstract Preparation of konjac glucomannan-grafted poly(trimethyl allyl ammonium chloride) (KGM-g-PTMAAC) was carried out using KGM as polysaccharide matrix and TMAAC as cationic comonomer to develop biodegradable flocculants. The structure of KGM-g-PTMAAC was characterized by FTIR, 13C solid-state NMR, elemental analysis (EA) and SEM. Thermal properties of KGM-g-PTMAAC were studied by thermal gravimetric

Abstract In this study, preparation and regeneration of methyl cellulose/calcium alginate beads (MC/CABs), a thermo-sensitive adsorbent material, have been introduced. The effects of preparation parameters, including mass ratio of methyl cellulose to calcium alginate, CaCl2 concentration, stirring speed and calcification time, on the adsorption property and the compressive strength of MC/CABs have

Abstract Two new aromatic diiodides with ether–sulfone linkages were synthesized via a one-step procedure. A series of poly(arylene ether sulfone amide)s were synthesized by a supported palladium-catalyzed polycondensation of aromatic diiodides having ether–sulfone linkages, aromatic diamines, and CO. Polycondensation reactions were conducted in N,N-dimethylacetamide using a magnetic nanoparticles-bound

Abstract Thermally conductive and electrically insulating polymer composites are in great demand for the heat management of modern electronics. Herein, a novel method consisting of the foaming and subsequent infiltrating processes is developed to construct a thermally conductive 3D framework in silicone rubber (SR) for enhancing the thermal conductivity. The thermal conductivity of an alumina (Al2O3)/SR

Abstract In the current research, physical and morphological properties of high-density polyethylene (HDPE) were investigated after equal-channel angular pressing (ECAP) for up to three passes via route A, in which the sample is pressed without any rotation between individual passes, at the temperature of 80 °C. The results of density, differential scanning calorimetry (DSC) and X-ray diffraction (XRD)