A novel wound dressing based on chitosan (CS) and gelatin (GL) was prepared and the effect of potato-starch (ST), sesame oil (SO) and banana peel powder (BPP) on the physical and mechanical properties, cytocompatibility and wound healing capability of the films were evaluated. The mechanical results showed that the samples containing 5 wt% of potato-starch and 7 wt% of banana peel powder had the best

A comparative study of the degradation of poly(methyl methacrylate) (PMMA) films deposited on metal mirrors as a result of heat treatment or irradiation with various UV or γ radiation is presented. The main degradation processes of PMMA during degradation are the random homolytic breakdown of carbon–carbon bonds in the polymer main chain and the photolysis of the lateral methyl groups and lateral esters

Self-healing hydrogels which have magical self-healing properties have attracted much attention in recent years. Here, we prepared a self-healing hydrogel with biocompatibility and NaHCO3 degradability. The hydrogel is constructed from cross-linking of poly(N,N-dimethyl acrylamide-stat-4-formylphenyl acrylate) P(DMA-stat-FPA) by pectin achlydrazide (pectin-AH). This hydrogel has base labile phenolic

The effect of a surface modification process known as "mussel-inspired modification" on the adsorption dynamics of hydrophobic adsorbent, namely XAD1180, was studied based on equilibrium adsorption data. In the study, three anionic colorants (i.e., Sunset yellow, SY; Allura red, AR; and Tartrazine, TZ) were used as the model compounds. The role of some experimental parameters, such as pH (4–7), ionic

Abstract The porous three-dimensional metal organic framework (MOF) based on Zn(II) of {[Zn5(L)2(OH)2(OH2)2(H2O)4]·2DMF·H2O} (1) which contains the pentanuclear cluster of [Zn5(μ3-OH)2(μ2-OH2)2]8+ was synthesized through using oxygen-bridged 5,5′-oxidiisophthalic acid (H4L) connector under the solvothermal conditions and further characterized. The structural integrity and crystallinity of the skeleton

Polymer nanocomposite films were formed from the aqueous dispersion of thermally linking styrene-acrylic copolymer (Tubifast 4010®, CHT), partially esterified melamine resin (Tubifix®, CHT), and ZnO nanoparticles as filler. The developed nanocomposite films were characterized by elemental (CHNS) analysis, SEM, EDX, IR spectroscopy, XRD, and swelling degree study. The EDX analysis proved the presence

A series of amphiphilic acrylate block copolymer (ABC) modified epoxy were prepared by the solution casting method. The mechanical strength, thermal stability, and light transmittance of the modified epoxies were characterized, and the fracture surfaces of the ABC modified epoxy were characterized with multi techniques for the toughening mechanism exploration. The results indicated that the glass transition

Polyacrylonitrile copolymer (PAN) fiber and PAN/lignin (PL) fiber were wet spun from the PAN copolymer solution and PAN/Lignin blend solution using dimethyl sulphoxide (DMSO) solvent. A blend of 90% by weight (wt %) PAN terpolymer and 10wt% lignin dissolved in DMSO was used in wet spinning of PL fiber. Viscoelastic properties of PAN solution and PAN/lignin solution in DMSO were determined by rheometer

The benefit of using alkali-treated hemp fibre as the reinforcement for rotationally moulded polyethylene composites was evaluated in this research. Untreated and alkali-treated hemp fibre were characterised using different techniques such as scanning electron microscopy (SEM), thermal analysis, and Fourier transform infrared spectroscopy (FT-IR). These techniques showed that the alkali treatment removed

The cheaper and easy to handle catalysts are particularly important for catalytic studies. Herein, inexpensive Co2O3 and MnO2 were used as catalysts for the ring-opening polymerization (ROP) of rac-lactide (rac-LA) and ε-caprolactone (ε-CL). The polymerization proceeded in a controlled manner with the formation of high molecular weight (Mn) and narrow dispersity (Ð). Heterotactically enriched (Pr up

Isoindigo (IID) has been developed as an electron deficient moiety for high-performance conjugated organic materials, especially for constituting donor–acceptor (D-A) type conjugated polymers. To further enhance the planarity of IID unit to promote the associated intramolecular charge transfer (ICT) effect of the derived polymers, various of structural modifications have been performed in recent years

The original version of this article unfortunately contained a mistake. The names of the authors were presented incorrectly as:

Starch-g-polyacrylamide copolymer and its nanocomposite with Fe3O4 and graphene oxide have been successfully synthesized. The synthesized samples were characterized using FTIR, XRD, SEM, HRTEM, and VSM. The factors that affect the adsorption efficiency of samples for Ni(II) ions from aqueous solutions as pH, initial Ni(II) ions concentration, contact time and temperature have been examined. The maximum

In this study, a pH-sensing electrospun mat containing purple cabbage (PC) (Brassica oleracea) anthocyanins was developed for wound dressing application. The pH-sensing electrospun mat was prepared from sodium alginate (Alg) and poly (vinyl alcohol) (PVA) via electrospinning. PC anthocyanins were embedded into the electrospun mat with the addition of PC extract into the Alg/PVA electrospun solution

Molecular dynamics simulation were employed to investigate the effect of changing the potential energies describing primary and secondary bonds on the Young’s modulus of a polymer. The energies were changed by arbitrarily modifying the parameters of the potential energy model function. The parameters influence the structure of the polymer and its global energy, eventually causing changes to the Young’s

This paper reports the development of a novel photocurable carbon fiber/polyether-polythioether (TF CFEC) composite and the comparison of its mechanical performance with that of a conventional thermally cured carbon fiber-epoxi composite (CTC CFEC). Unidirectional carbon fiber (CF) was used as the reinforcement agent in both composites. In the case of the TF CFEC, the CF employed was surface-functionalized

The innovation of Ziegler-Natta (Z-N) catalysts opened a novel aspect of chemistry in terms of polyolefin formation. Significant progress of more than fifty years in catalytic olefin polymerization simplified polyolefin production by optimizing the reaction conditions and internal donors. In this review, we particularly emphasized on recent development on different internal donor based Z-N catalyst

The surface properties, mechanical characteristics, and morphology of the PP/CPA-Fe composite based on a polymer blend of polypropylene (PP) and copolyamide (CPA) filled with dispersed iron (Fe) were studied. The effect of stepwise behavior of the surface energy and its dispersive and polar components was previously unknown and discovered for the first time when the composition of the polymer blend

Thiol-functionalized organosilica particles with bowl-like or golf ball-like morphology were successfully obtained through a facile sol–gel procedure. 3-mercaptopropyltrimethoxysilane (MPTMS) and tetraethoxysilane (TEOS) were copolymerized under the catalysis of ammonia. The morphology and the growth process of bowl-like and golf ball-like organosilica particles were observed using scanning electron

Epoxy (EP) composites were intended with polydopamine modified titanate whiskers for mechanical improvement. The EP composites exhibited distinct morphology, and also demonstrated enhanced interfacial properties generated by functional groups on the modified whiskers and the matrix, which was favorable for composites mechanical performance. The composite with 7.5 wt% modified whiskers showed notable

Nanocomposites and silver nanocomposite coatings based on a copolymer of 1-vinyl-1,2,4-triazole and acrylic acid were synthesized in an aqueous and aqueous-ethanol medium on pure iron and steel electrodes by the electrochemical method. The composition and structure of nanocomposites is confirmed by UV, IR spectroscopy, X-ray diffraction analysis, transmission electron microscopy, thermogravimetric

In this research, thermally conductive polyamide 6/hexagonal boron nitride (PA6/hBN) nanocomposites waaere fabricated via an in-situ ring-opening polymerization of ε-caprolactam. The hBN filler was exfoliated through a co-solvent exfoliation process and then chemically modified to form an ε-caprolactam-grafted BN (cBN). After that, PA6 was introduced onto the cBN surface using a grafting from method

The pressure-assisted photopolymerization in the fullerene complex with ferrocene C60·{Fe(C5H5)2}2 was studied for the first time by simultaneous in-situ Raman and X-ray diffraction (XRD) techniques at pressures up to 8 GPa. The irreversible splitting of the Ag(2) mode in the Raman spectra, resembling pristine fullerene polymerization, was observed at 4.6 GPa. The structural analysis does not show

Molecularly imprinted polymers (MIP) are known as high selective sorbent, however, its application in aqueous medium is very limiting. In this way, a new hybrid MIP was successfully synthesized for saccharin (SAC) extraction in aqueous medium. SAC determination in surface waters becomes a challenge due to high dissipation that results in low concentration and susceptibility to potential interferences

Herein, the review aims to compile some reportable work of researchers carried concerning the use of nanomaterials in the polymeric composites for significant improvements in the properties and to report the application areas of such nanocomposites. Carbon nanotubes, cellulose nanoparticles, titanium dioxide, and other nanoparticles are used in the polymeric composites to enhance their mechanical,

Antibacterial gauze is commonly used to prevent wound inflammation and infection. In this study, a novel antibacterial gauze was prepared using antimicrobial peptides and silver nanoparticles, achieving a wide antimicrobial spectrum and increased antimicrobial properties. The properties of the antibacterial gauze were analyzed by scanning electron microscopy, energy-dispersive spectrometry, weight

The addition of magnetic nanoparticles gives unique properties to hydrogels. Magnetic-sensitive gels have various applications in targeted drug delivery, separation, and sensing. One of the most advantageous aspects of using magnetic nanoparticles is their ability to respond to remote control by an external magnetic field. Microgels loaded with magnetic nanoparticles enhance control in magnetic resonance

The effect of the addition of cassava thermoplastic starch on the general properties and the photodegradation behavior of poly(L-lactic acid) (PLLA) was evaluated by blending PLLA with TPS in different weight percentages (5, 10, 15, 20 and 25 wt%). The blends were studied through differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and mechanical

Two liquid crystalline epoxy (LCE) resins containing different mesogenic lengths were synthesized and cured with two different aromatic diamine curing agents, diaminodiphenylsulfone (DDS) and diaminodiphenylmethane (DDM) to prepare high performance LCE networks. The spectroscopic structures of LCE resins were identified by Fourier transform infrared (FT-IR) spectroscopy, Proton nuclear magnetic resonance

To research the role of mandrel rotation speed on the morphology and mechanical properties of polypropylene (PP) pipes, a self-made rotational shear system (RSS) was applied in this study to manufacture plastic pipes with improved hoop tensile strength through applying hoop shear on the pipes using a rotational mandrel. Morphology study results indicated that different morphologies of the PP pipes

A novel diamine (3,6-CAPDA) bearing carbazole and amide group was prepared. On the basis of 3,6-CAPDA and pyromellitic dianhydride (PMDA), a high-barrier polyimide (3,6-CAPPI) was obtained through a two-step polymerization method. The 3,6-CAPPI displays excellent barrier performances and thermal stability. Its oxygen permeability (OP) and water vapor permeability (WVP) are low to 2.63 cm3·mil·m−2·day−1

The effects of dynamic vulcanization systems including sulfur, peroxide, and sulfur/peroxide mixed vulcanization were investigated for dynamically-vulcanized blends of polylactic acid (PLA) and natural rubber (NR) at the PLA/NR ratio of 85/15. For the sulfur system, the CV sub-system (CV1), which used much lower accelerator (TBBS) content than the EV sub-system, rendered higher impact strength and

A novel class of clickable perfluorocyclobutyl (PFCB) aryl ether polymers containing azido groups (APFCB polymers) is reported. The thermal cyclopolymerization reaction of 2-methyl-1,4-bis(1,2,2-trifluorovinyloxy)benzene was first optimized by DSC, GPC and 19F NMR, and the matrix polymer (PFCB-Me) with high average molecular weights (Mw = 13.61 × 104 g/mol) and molecular weight distributions (Mw/Mn = 1

We investigate the mechanical behavior of polypropylene/silica composites under mode I and II loading by using molecular dynamics simulations, focusing on the effects of two typical surface coupling agents of HMDZ and APTES on the interface deformation and failure. It is found that under mode I loading, the silica surface functionalized with APTES can enhance the tensile strength of polypropylene/silica

Synthesis of poly(α-methyl β-alanine)-poly(ε-caprolactone) [PmBA-(PCL)2] tri arm star polymer was accomplished by "click" chemistry. For this purpose, poly(α-methyl β-alanine) (PmBA) was synthesized from methacrylamide by hydrogen transfer polymerization (HTP). Terminally dibromo PmBA (PmBA-2Br) was obtained by using the end-group modification method. Terminally diazido poly(α-methyl β-alanine) [PmBA-2N3]

The coating of the fibrous skeleton of luffa cylindrica (LC) with polyaniline (PANI) was carried out by in-situ polymerization of aniline. A thin PANI layer in its emeraldine-salt form (ES) got bound on to the LC surface, as revealed by the green color the latter developed, procuring more roughness to the luffa fibers. The surfaces of both materials, i.e. the purified original luffa (LC) and the PANI-coated

The recent research focused on the fabrication of flexible battery and electrochemical performance in various fields such as flexible electronics, wearable sensors and implantable medical devices. Due to essential safety and less stability of the organic liquid-based electrolytes were replaced by the ionic liquid electrolytes with enhancing properties. In this manuscript, the flexible LIB was fabricated

First of all, we will provide a brief background on the self-healing hydrogels we produced which are suitable for the complex environment of nature. In this paper, disulfide bonds and acylhydrazone bonds can be combined in SH-WPU and hydrogen bonds existed in PAMAM. And the hydrogel can achieve self-healing under acid, alkaline, neutral or light environment.Self-healing for 1 h, 24 h and 48 h, the

Due to the environmental impact caused by incorrect disposal and the non-biodegradability of synthetic polymers, the packaging sector seeks renewable raw materials. An alternative is the utilization of natural renewable polymer, such as thermoplastic starch (TPS), mixed with synthetics. However, the chemical incompatibility between these two materials leads to the use of a compatibilizer agent. Even

Oral candidiasis is an infection that occurs inside of the cheek and oral cavity which is very painful. Treatment of oral candidiasis is very important for its commonness and the inadequate medication options are available for the treatment. Synthesis and evaluation of Poly (acrylamide) loaded thymol nanogelalternative for conventional creams was the main aim of this study. Polyacrylamide nanogel was

The ring opening polymerization reactions of ε-caprolactone and L-lactide in the presence of the initiator dipentaerythritol, generated the hydroxy-terminated 6-armed star-shaped ε-caprolactone and L-lactide oligomers (H6CLO and H6LAO), respectively. The disulfide-containing polyester-urethane networks (PN-LCxy-DSz, weight ratios of H6LAO/H6CLO: x/y = 1/0, 3/1, 1/1, 1/3, and 0/1, BHEDS/(H6LAO + H6CLO)

Isotactic poly(cyclohexene carbonate) (iPCHC) is a newly developed degradable semi-crystalline polymer. In this paper, the crystallization kinetics of iPCHC above the glass transition temperature (Tg) and the enthalpy relaxation kinetics below Tg were studied by using a commercial fast-scan chip-calorimeter—Flash DSC 1. Results showed that half crystallization time of iPCHC as a function of crystallization

Binary and ternary systems of HDPE/EVA with amorphous nanotalc contents of 1% m/m were prepared by mixing the components in the molten state in a twin-screw extruder followed by injection molding. The thermal properties were investigated by thermogravimetric analysis (TGA) and by differential scanning calorimetry (DSC) and showed that the thermal stability of the nanocomposites was slightly improved

Light-activated shape-memory materials can return to the originally printed or manufactured shape in temperatures higher than their glass transition temperatures. This effect is widely applicable in the field of biomedicine, biology and others. In this research we are focusing on new materials for light-activated 4D printing—the focus is placed on biocompatible CuS nanoparticle /polyurethane composite

To make potential the biodegradable polyethylene glycol (PEGO) toward photocrosslinking, it was cooligomerized with fumaryl chloride by esterification reaction. The obtained viscous liquid injectable macromere, OPEGF, was characterized by FTIR and GPC. In another reaction, nanosilica was treated with acryloyl chloride to obtain silica-AC nanopowder and subsequently dispersed in the OPEGO matrix in

Understanding the mechanical behavior of electrospun materials and how to control it is important and valuable in terms of their future applications. That is why, in this study, materials with controlled fibers alignment and desired mechanical properties were fabricated by electrospinning of poly(3-hydroxybutyrate) (PHB) onto three types of rotating collectors – drum (smooth), blade and grid (patterned)

Herein we report the fabrication of cross-linked polystyrene particle with a variety of nonspherical morphologies such as red blood cell-like, cap-like, apple-like and so forth through two-stage dispersion polymerization in polar media. Furthermore, we examine the effect of different polymerization conditions including monomer and cross-linker concentration, and the type of initiator, monomer, stabilizer

Recently, carbon capture utilizing membrane technology has received much attention to limit the adverse effect caused by rising carbon dioxide (CO2) concentration in the atmosphere as they are less energy intensive and more environmentally friendly. Among the type of membranes, mixed matrix membranes (MMMs) has shown promising gas separation results. In this study, polymer blend MMMs were fabricated

In this work, a series of linear and star-shaped poly(ε-caprolactone)s (SPCL) with various arm numbers were successfully synthesized with ring-opening polymerization (ROP) with the initiators having different number of hydroxyl functional groups. The molecular characteristics of synthesized PCLs were analyzed via Fourier Transform Infrared Spectroscopy (FTIR), proton nuclear magnetic resonance spectra

Abstract In the current research, a new Mn(II)-based coordination polymer, {(NH2Me)2[Mn4(Hntb)4(4,4′-bpy)(OH)2] DMF} (1) have been formed by mixing the ligands of H3ntb (4,4′,4′′-nitrilotris-benzoic) and 4,4′-bpy (4,4′-bipyridine). According to the results of UV detection, complex 1 has strong blue luminescence, which means that it can be used as a fluorescent probe for specific detection of Fe3+ ion

Polymer micelles obtained from amphiphilic copolymers have emerged as promising drug vehicles given their nanometric size, simple release, and encapsulation mechanisms. Nevertheless, their lack of functional groups that interact with the drugs causes low encapsulation capacities. In this paper, the synthesis of an amphiphilic copolymer composed of polyethylene glycol and a poly(ester-co-carbonate)

Projecting optimal composition for hydrogel blends, while designing sustained release formulation of hydrophilic drug, is of paramount importance. In present study, composite hydrogel incorporating ciprofloxacin (0.2% w/w) was prepared by sequential addition of polyvinyl alcohol (PVA) (20–95% w/w), starch (0–75% w/w), citric acid (5–80% w/w) as cross-linker in a heat-induced gelatinization process

We report synthesis and characterization of a set of thermoset polyurethane (PU) bionanocomposites based on a polyol blend of poly(ε-caprolactone)/ polyethylene glycol (PCL/PEG) ABA block copolymers and their homopolymers (Mw: 2000 D). ABA block copolymers of PCL/PEG, with variable block lengths, were blended with their homopolymers. The relative weight content of Homo: Block (HB) was set 1:1 and the

This paper highlights the efficient adsorption of Cr (VI) from wastewater using polyacrylonitrile (PAN)/montmorillonite (Mt) and polyacrylonitrile/zinc oxide nanoparticle-modified montmorillonite (ZnO-Mt) nanofibrous nanocomposites as adsorbents. Mt was modified using zinc oxide nanoparticles (ZnO) by an adsorption process. The particle size of ZnO-Mt was found to be 18 ± 2 nm. Field-emission scanning

Ultra high molecular weight polyolefins as the main category of drag reducing agents play the main role in energy transportation. The present study seek to thoroughly investigate, the implications of several determining factors, such as catalyst structure, monomer type and concentration, in the coordinative polymerization of 1-olefins coupled with the corresponding accumulative effect of these precursors

The original version of this article unfortunately contained many mistakes with regard to some mathematical expressions and to Tables 3 & 5.

Epoxy composites reinforced with three different shapes of Al2O3 nanoparticles were synthesized by instant cross-linking process. Out of three types of Al2O3 particles, two were of rod shape particles termed as large nano rod (diameter 2–4 nm and length 100–200 nm), and small nano rod (diameter of 5–10 nm and length less than 50 nm) and third particle was spherical in shape (diameter of 27–43 nm).

The purpose of this study is to replace the existing synthetic kraft paper with a biodegradable PLA-PCL kraft paper that can serve as a valuable coated abrasive and packaging products replacing the conventional petroleum based products. PCL toughens the brittle PLA polymer due to its plasticizing action. The toughening effect of 10% PCL in PLA is found to be maximum towards improving its better set