The novel natural low-molecular-mass polysaccharide (SLWPP-3) from pumpkin (Cucurbia moschata) was separated from the waste supernatant after macromolecular polysaccharide production and purified using a DEAE cellulose-52 column and gel-filtration chromatography. Chemical and instrumental studies revealed that SLWPP-3 with a molecular mass of 3.5 kDa was composed of rhamnose, glucose, arabinose, galactose

Pectins have anti-inflammatory effects via Toll-like receptor (TLR) inhibition in a degree of methyl-esterification-(DM)-dependent manner. However, pectins also vary in distribution of methyl-esters over the galacturonic-acid (GalA) backbone (Degree of Blockiness - DB) and impact of this on anti-inflammatory capacity is unknown. Pectins mainly inhibit TLR2-1 but magnitude depends on both DM and DB

A new strategy of recycling and reusing abandoned carbon fiber reinforced plastics (CFRP) is proposed: CFRPs are first fully carbonized to CF reinforced carbon (C/C) preforms, and then are manufactured into high value-added C/C composites. The results showed that the carbon residue rate of epoxy-resin (EP) matrix was fully recovered as the decomposition route of EP matrix was changed by charring agent

Tensile quasi-static and fatigue behaviors of out-of-autoclave, quasi-isotropic, E-glass/epoxy composites with woven and stitched fiber architectures are compared. Some specimens were cyclically loaded to failure, while others were tested for residual modulus and ultimate strength. Both laminates survived 107 cycles at a maximum stress of 94.8 MPa but failed prior to 107 cycles at a maximum stress

Metallo‐centered enzymes have found applications in environmental remediation, green synthesis, and sensors. These enzymes destabilize at pH extreme, elevated temperature, or high organic content conditions. For these enzymes to find more widespread adoption and use stabilization to non‐native conditions is critical. In this manuscript, we report the impact of grafting‐polymers from the surface of

Exciting advancements in ionic polymer‐metal composite technology point toward a promising future for these materials as both high‐performance polymer actuators and sensors in novel soft‐robotic and biomimetic devices.

Filaments comprised of aluminum powder and poly(vinylidene fluoride) (PVDF) were produced vial melt‐processing to investigate the effect of particle size and loading on decomposition behavior and burn performance. Thermal analysis revealed that nanoscale Al samples decompose PVDF in one step through interactions with the Al particle surface. Microscale samples presented with two distinct decomposition

This review encompasses detailed knowledge about recent advancement in the synthesis of novel Nanohybrids. The materials based on matrix component as epoxy and Polyamide with the specified carbon nano-bifiller carbon nanotubes and nano-diamond have been discussed in detail due to their novelty and endless applications in various industries. Limited research have been carried out regarding synthesis

A biopolymer film serving as a wound-healing substitute was fabricated using keratin and fibrin (extracted from a goat hoof and blood, respectively) via modified Shindai techniques. The importance of keratin and fibrin along with gelatin and mupirocin for the fabrication of a biofilm by solvent casting method is shown in this work. In vitro microscopic images of the fibroblast NIH 3T3 cell lines revealed

Four series of brush block copolymers (BBCP), with near identical side chain compositions but varying backbone structures, were synthesized to investigate the effect of backbone structure on the process of thermal BBCP self-assembly to photonic crystals (PCs). Each of the self-assembled PC films were examined by reflection measurements, small angle X-ray scattering measurements, and scanning electron

A series of carbazole or triphenylamine based mono-chalcones, displaying either D-π-A or A-π-D-π-A architecture, have been designed and synthesized for intense absorption bands at around 405 nm with high molar extinction coefficients around 105 M-1cm-1 corresponding to π-π* electronic transitions. Photosensitivity of the new photoinitiating systems composed of a chalcone and an iodonium salt (Iod)

A mathematical model to describe the emulsion polymerization kinetics of co- and ter-polymerizations is developed. The model uses the well-known pseudo-homopolymerization approach together with recently developed models for radical entry and desorption in order to monitor crucial kinetic variables such as conversion and latex composition. The model includes a series of unknown parameters related to

Cationic polymers are one of the main classes of materials investigated against bacteria through the membrane-lysis mechanism. The cationic-hydrophobic balance and distribution of cationic and hydrophobic moieties of these polymers is known to have a major effect on antimicrobial activity. We have synthesized cyclic poly((2-dimethylamino) ethylmethacrylate) (PDMAEMA) based copolymers with various component

The synthesis of single chain nanoparticles (SCNPs) is a vibrant field in macromolecular science, enabled by a rich variety of synthetic strategies to induce macromolecular chain folding. Due to the decrease of the hydrodynamic volume upon folding, SCNP formation is typically characterized by a shift towards higher elution volumes in size exclusion chromatography (SEC). However, a step-change in the

Most organocatalysts for photo-controlled atom transfer radical polymerization (photo-ATRP) are metal complexes or syn-thetically elaborate organic dyes, which are toxic and expensive. Herein, we presented a combination of 1,1,3,3-tetramethylguanidine (TMG) and sodium iodide (NaI) under white LED irradiation that could catalyze iodine-mediated Photo-ATRP. Using dual initiator and combining with ring-opening

Aiming at solving the uncontrollability in the properties of chitosan caused by its uncontrollable structure, we synthesized two chitosan-mimetic polymers, the homopolymer mimic PHNI and the copolymer mimic PHNI-PHNIA, by the ring-opening metathesis polymerization (ROMP) and characterized their structures and performances by FTIR, 1H-NMR, 13C-NMR, XRD and DTG. The reaction feature of ROMP demonstrated

Polyethylene degrades slowly when discarded in the environment and exposed to natural weathering. A solution to this problem is the incorporation of additives to accelerate its biodegradation. In the present study, a biodegradable low-density polyethylene (LDPE) blend was obtained by the mixture of LDPE with a biodegrading additive (8% w/w) and the effect of accelerated weathering on biodegradation

In this study, the effect of modification of poly(3,4‐ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) morphology on its optical, charge transport, and photovoltaic properties of organic solar cells based on the P3HT:PC60BM bulk heterojunction is presented. It is shown that the addition of isopropyl alcohol to the PEDOT:PSS polymer solution and annealing of spin‐coated PEDOT:PSS film leads

To study the effect of cationic polyelectrolytes on the photoreduction of nitrobenzene over TiO2, a sequence of synthetic cationic polyelectrolytes (SCPs) containing acrylamide (AAm) and 2‐(dimethylamino)ethyl acrylate methochloride (DAEA) using various AAm:DAEA molar ratios (50:50, 55:45, 60:40, 70:30, and 85:15) were synthesized and named as PEA, PEB, PEC, PED, and PEE, respectively. According to

Carbon nanomaterials such as carbon nanotubes (CNTs), graphene and their hybrid have been studied extensively. Despite having excellent properties of CNTs and graphene have not yet been fully realized in the polymer composites. During fabrication agglomeration of CNTs and restacking of graphene is a serious concern that results in the degradation of properties of nanomaterials into the final composites

β-cyclodextrin (β-CD) based materials have been studied widely as adsorbents and filter membranes for removing pollutants in air or water applications. The present study aimed to develop a sandwich structure of eletrospun nanofibrous membrane based on β-cyclodextrin and PA66 to achieve the high mechanical strength and flow-through adsorption of heavy metal ions in water. The surface and cross section

In recent years, significant advancements in Fused Filament Fabrication (FFF) have enabled this technology to become one of the most leading techniques of Additive Manufacturing (AM) for the production of functional products. The poor mechanical properties of manufactured parts have traditionally imposed considerable limitations on use of FFF processes. These shortcomings have been overcome using new

The process of filament-to-filament adhesion during polymer extrusion additive manufacturing (AM) is critically influenced by temperature distribution around the filament. Direct measurement of temperature distribution around the filament being deposited is, therefore, important for fully understanding this critical process. While past papers have reported side-view (x-z) temperature measurement using

Gases or supercritical fluids (SCF) are widely used in polymer science and engineering, as their dissolution into polymeric materials will alter their inherent thermal properties; including melting and crystallization temperatures (Tm and Tc). One possible method to determine these temperatures, at elevated pressures, is to use a high-pressure differential scanning calorimeter (HP-DSC). However, the

In this study, the self-healing ability of the E-glass fibers/epoxy composites based on microvascular channels under flexural and tensile loading was investigated by a three-part healant. The fabrication of the microvascular channels was conducted through embedding the solid preforms and removing them. The epoxy resin and premix anhydride hardener-CuBr2 (2-Methylimidazole) as the healing agents were

The specimen geometry has a significant influence on the Charpy impact strength. This is often a problem when it comes to the analysis of materials that can only be prepared with a curved shape, or which, like some biological structures, are naturally given in curved form like nutshells. The question repeatedly arises to what extent the curvature influences the impact strength. Hence, the present study

Additive manufacturing is suitable for producing complex geometries; however, variation in thermo-mechanical properties is observed during one batch cycle when degradable aliphatic polyesters are used in melt extrusion-based methods. This is one important reason for why additive manufacturing has not yet been fully utilised to produce degradable medical implants. Herein, the internal variation has

The aim of this study was to investigate the feasibility of replacing petroleum-based terephthalic acid (PTA) with renewable 2,5-thiophenedicarboxylic acid (TDCA) in poly(ethylene terephthalate) (PET), a series of copolyesters were synthesized from PTA, TDCA and ethylene glycol (EG). The effects of composition on structures, thermal properties, mechanical properties and β relaxation were studied. With