Preparation and Evaluation of Nanofibrous Hydroxypropyl Cellulose and β-Cyclodextrin Polyurethane Composite Mats

A series of nanofibrous composite mats based on polyurethane urea siloxane (PUUS), hydroxypropyl cellulose (HPC) and β-cyclodextrin (β-CD) was prepared using electrospinning technique. PUUS was synthesized by two steps solution polymerization procedure from polytetramethylene ether glycol (PTMEG), dimethylol propionic acid (DMPA), 4,4′-diphenylmethane diisocyanate (MDI) and 1,3-bis-(3-aminopropyl) tetramethyldisiloxane (BATD) as chain extender. Then, the composites were prepared by blending PUUS with HPC or βCD in a ratio of 9:1 (w/w), in 15% dimethylformamide (DMF). The PUUS and PUUS based composite solutions were used for preparation of nanofibrous mats. In order to identify the potential applications, different techniques were used to evaluate the chemical structure (Fourier transform infrared-attenuated total reflectance spectroscopy—FTIR-ATR), morphological structure (Scanning electron microscopy—SEM and Atomic force microscopy—AFM), surface properties (contact angle, dynamic vapors sorption—DVS), mechanical characteristics (tensile tests), thermal (differential scanning calorimetry—DSC) and some preliminary tests for biocompatibility and microbial adhesion.

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Poly(furfuryl alcohol)-Polycaprolactone Blends

Polymers ◽

10.3390/polym11061069 ◽

2019 ◽

Vol 11 (6) ◽

pp. 1069 ◽

Cited By ~ 3

Author(s):

Gabriele Nanni ◽

José A. Heredia-Guerrero ◽

Uttam C. Paul ◽

Silvia Dante ◽

Gianvito Caputo ◽

...

Keyword(s):

Mechanical Properties ◽

Furfuryl Alcohol ◽

Barrier Properties ◽

Tensile Tests ◽

Attenuated Total Reflection ◽

Toxicity Tests ◽

Scanning Calorimetry ◽

Blend Films ◽

Force Microscopy ◽

Atomic Force

Poly(furfuryl alcohol) (PFA) is a bioresin synthesized from furfuryl alcohol (FA) that is derived from renewable saccharide-rich biomass. In this study, we compounded this bioresin with polycaprolactone (PCL) for the first time, introducing new functional polymer blends. Although PCL is biodegradable, its production relies on petroleum precursors such as cyclohexanone oils. With the method proposed herein, this dependence on petroleum-derived precursors/monomers is reduced by using PFA without significantly modifying some important properties of the PCL. Polymer blend films were produced by simple solvent casting. The blends were characterized in terms of surface topography by atomic force microscopy (AFM), chemical interactions between PCL and PFA by attenuated total reflection-Fourier transform infrared (ATR-FTIR), crystallinity by XRD, thermal properties by differential scanning calorimetry (DSC), and mechanical properties by tensile tests and biocompatibility by direct and indirect toxicity tests. PFA was found to improve the gas barrier properties of PCL without compromising its mechanical properties, and it demonstrated sustained antioxidant effect with excellent biocompatibility. Our results indicate that these new blends can be potentially used in diverse applications ranging from food packing to biomedical devices.

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New thermoplastic poly(carbonate-urethane) elastomers

Polish Journal of Chemical Technology ◽

10.2478/v10026-011-0005-x ◽

2011 ◽

Vol 13 (1) ◽

pp. 23-30 ◽

Cited By ~ 10

Author(s):

Anna Kultys ◽

Magdalena Rogulska

Keyword(s):

Soft Segment ◽

Tensile Tests ◽

X Ray Diffraction ◽

Scanning Calorimetry ◽

Force Microscopy ◽

Melt Polymerization ◽

Atomic Force ◽

Amorphous Structures ◽

A Chain ◽

Poly Carbonate

New thermoplastic poly(carbonate-urethane) elastomersTwo series of novel thermoplastic poly(carbonate-urethane) elastomers, with different hard-segment content (30 - 60 wt %), were synthesized by melt polymerization from poly(hexane-1,6-diyl carbonate) diol of Mn= 2000 as a soft segment, 4,4'-diphenylmethane diisocyanate (MDI) or hexane-1,6-diyl diisocyanate (HDI) and 6,6'-[methylenebis(1,4-phenylenemethylenethio)]dihexan-1-ol as a chain extender. The structure and basic properties of the polymers were examined by Fourier transform infrared spectroscopy, X-ray diffraction analysis, atomic force microscopy, differential scanning calorimetry, thermogravimetric analysis, Shore hardness and tensile tests. The resulting TPUs were colorless polymers, showing almost amorphous structures. The MDI-based TPUs showed higher tensile strengths (up to 21.3 MPa vs. 15.8 MPa) and elongations at break (up to 550% vs. 425%), but poorer low-temperature properties than the HDI-based analogs.

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Tb3+/Eu3+ Complex-Doped Rigid Nanoparticles in Transparent Nanofibrous Membranes Exhibit High Quantum Yield Fluorescence

Nanomaterials ◽

10.3390/nano10040694 ◽

2020 ◽

Vol 10 (4) ◽

pp. 694 ◽

Cited By ~ 2

Author(s):

Peng Lu ◽

Yanxin Wang ◽

Linjun Huang ◽

Sixian Lian ◽

Yao Wang ◽

...

Keyword(s):

Emission Spectra ◽

Electrospinning Process ◽

Fluorescence Properties ◽

Quantum Yields ◽

Scanning Calorimetry ◽

Force Microscopy ◽

Β Phase ◽

Atomic Force ◽

Potential Applications ◽

Fibrous Membranes

In this study, transparent membranes containing luminescent Tb3+ and Eu3+ complex-doped silica nanoparticles were prepared via electrospinning. We prepared the electrospun fibrous membranes containing Tb(acac)3phen- (acac = acetylacetone, phen = 1,10-phenanthroline) and/or Eu(tta)3phen- (tta = 2-thenoyltrifluoroacetone) doped silica (M-Si-Tb3+ and M-Si-Eu3+) and studied their photoluminescence properties. The fibrous membranes containing the rare earth complexes were prepared by electrospinning. The surface morphology and thermal properties of the fibrous membrane were studied by atomic force microscopy (AFM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), respectively. Fluorescence spectroscopy was used to characterize the fluorescence properties of the membranes. During the electrospinning process, the PVDF transitions from the α phase to the β phase, which exhibits a more rigid structure. The introduction of rigid materials, like PVDF and silica, can improve the fluorescence properties of the hybrid materials by reducing the rate of nonradiative decay. So the emission spectra at 548 nm (Tb) and 612 nm (Eu) were enhanced, as compared to the emission from the pure complex. Furthermore, the fluorescence lifetimes ranged from 0.6 to 1.5 ms and the quantum yields ranged from 32% to 61%. The luminescent fibrous membranes have potential applications in the fields of display panels, innovative electronic and optoelectronic devices.

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Properties of poly(γ-benzyl l-glutamate) membrane modified by polyurethane containing carboxyl group

Chemical Papers ◽

10.2478/s11696-011-0032-3 ◽

2011 ◽

Vol 65 (4) ◽

Cited By ~ 1

Author(s):

Guo-Quan Zhu ◽

Fa-Gang Wang ◽

Qiao-Chun Gao ◽

Guo-Chang Li ◽

Ping Wang

Keyword(s):

Chemical Properties ◽

Tensile Tests ◽

Carboxyl Group ◽

Scanning Calorimetry ◽

Physical Methods ◽

Force Microscopy ◽

Atomic Force ◽

Blend Membranes ◽

Scanning Electron ◽

And Chemical Properties

AbstractA series of poly(γ-benzyl l-glutamate) (PBLG)/polyurethane (PU) containing carboxyl group blend membranes was prepared by casting the polymer blend solution in dimethylformamide (DMF). The surface morphology of the PBLG/PU blend membranes was investigated by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Thermal, mechanical, and chemical properties of PBLG/PU blend membranes were studied by differential scanning calorimetry (DSC), tensile tests and other physical methods. It was revealed that the introduction of PU could exert outstanding effects on the morphology and the properties of PBLG membrane.

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Multifunctional Protective PVC-ZnO Nanocomposite Coatings Deposited on Aluminum Alloys by Electrospinning

Coatings ◽

10.3390/coatings9040216 ◽

2019 ◽

Vol 9 (4) ◽

pp. 216 ◽

Cited By ~ 9

Author(s):

Alvaro Iribarren ◽

Pedro Rivero ◽

Carlos Berlanga ◽

Silvia Larumbe ◽

Adrian Miguel ◽

...

Keyword(s):

Aluminum Alloys ◽

Coating Properties ◽

Scanning Calorimetry ◽

Electrospinning Technique ◽

Water Contact ◽

Pitting Potential ◽

Electrochemical Tests ◽

Force Microscopy ◽

Atomic Force ◽

Deposition Parameters

This paper reports the use of the electrospinning technique for the synthesis of nanocomposite micro/nanofibers by combining a polymeric precursor with hydrophobic behavior like polyvinyl chloride (PVC) with nanoparticles of a corrosion inhibitor like ZnO. These electrospun fibers were deposited on substrates of the aluminum alloy 6061T6 until forming a coating around 100 μm. The effect of varying the different electrospinning deposition parameters (mostly applied voltage and flow-rate) was exhaustively analyzed in order to optimize the coating properties. Several microscopy and analysis techniques have been employed, including optical microscopy (OM), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). Water contact angle (WCA) measurements have been carried out in order to corroborate the coating hydrophobicity. Finally, their corrosion behavior has been evaluated by electrochemical tests (Tafel curves and pitting potential measurements), showing a relevant improvement in the resultant corrosion resistance of the coated aluminum alloys.

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Novel Poly(ester urethane urea)/Polydioxanone Blends: Electrospun Fibrous Meshes and Films

Molecules ◽

10.3390/molecules26133847 ◽

2021 ◽

Vol 26 (13) ◽

pp. 3847

Author(s):

Kiran R. Adhikari ◽

Inessa Stanishevskaya ◽

Pablo C. Caracciolo ◽

Gustavo A. Abraham ◽

Vinoy Thomas

Keyword(s):

Vascular Graft ◽

Tensile Tests ◽

Biomechanical Properties ◽

High Porosity ◽

Scanning Calorimetry ◽

Force Microscopy ◽

Atomic Force ◽

Cardiac Muscles ◽

Nanoscale Structure ◽

Scanning Electron

In this work, we report the electrospinning and mechano-morphological characterizations of scaffolds based on blends of a novel poly(ester urethane urea) (PHH) and poly(dioxanone) (PDO). At the optimized electrospinning conditions, PHH, PDO and blend PHH/PDO in Hexafluroisopropanol (HFIP) solution yielded bead-free non-woven random nanofibers with high porosity and diameter in the range of hundreds of nanometers. The structural, morphological, and biomechanical properties were investigated using Differential Scanning Calorimetry, Scanning Electron Microscopy, Atomic Force Microscopy, and tensile tests. The blended scaffold showed an elastic modulus (~5 MPa) with a combination of the ultimate tensile strength (2 ± 0.5 MPa), and maximum elongation (150% ± 44%) in hydrated conditions, which are comparable to the materials currently being used for soft tissue applications such as skin, native arteries, and cardiac muscles applications. This demonstrates the feasibility of an electrospun PHH/PDO blend for cardiac patches or vascular graft applications that mimic the nanoscale structure and mechanical properties of native tissue.

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The Infuence of Salicin on Rheological and Film-Forming Properties of Collagen

Molecules ◽

10.3390/molecules26061661 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1661

Author(s):

Katarzyna Adamiak ◽

Katarzyna Lewandowska ◽

Alina Sionkowska

Keyword(s):

Mechanical Properties ◽

Atomic Force Microscopy ◽

Infrared Spectroscopy ◽

Rheological Properties ◽

Silver Carp ◽

Shear Tests ◽

Force Microscopy ◽

Atomic Force ◽

Film Forming ◽

Potential Applications

Collagen films are widely used as adhesives in medicine and cosmetology. However, its properties require modification. In this work, the influence of salicin on the properties of collagen solution and films was studied. Collagen was extracted from silver carp skin. The rheological properties of collagen solutions with and without salicin were characterized by steady shear tests. Thin collagen films were prepared by solvent evaporation. The structure of films was researched using infrared spectroscopy. The surface properties of films were investigated using Atomic Force Microscopy (AFM). Mechanical properties were measured as well. It was found that the addition of salicin modified the roughness of collagen films and their mechanical and rheological properties. The above-mentioned parameters are very important in potential applications of collagen films containing salicin.

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Preparation, Thermal, and Thermo-Mechanical Characterization of Polymeric Blends Based on Di(meth)acrylate Monomers

Polymers ◽

10.3390/polym13060878 ◽

2021 ◽

Vol 13 (6) ◽

pp. 878

Author(s):

Krystyna Wnuczek ◽

Andrzej Puszka ◽

Łukasz Klapiszewski ◽

Beata Podkościelna

Keyword(s):

Mechanical Analysis ◽

Attenuated Total Reflection ◽

Scanning Calorimetry ◽

Force Microscopy ◽

Chemical Structures ◽

Atomic Force ◽

Polymeric Blends ◽

Ft Ir ◽

Acrylate Monomers ◽

Synthesized Materials

This study presents the preparation and the thermo-mechanical characteristics of polymeric blends based on di(meth)acrylates monomers. Bisphenol A glycerolate diacrylate (BPA.GDA) or ethylene glycol dimethacrylate (EGDMA) were used as crosslinking monomers. Methyl methacrylate (MMA) was used as an active solvent in both copolymerization approaches. Commercial polycarbonate (PC) was used as a modifying soluble additive. The preparation of blends and method of polymerization by using UV initiator (Irqacure® 651) was proposed. Two parallel sets of MMA-based materials were obtained. The first included more harmless linear hydrocarbons (EGDMA + MMA), whereas the second included the usually used aromatic copolymers (BPA.GDA + MMA). The influence of different amounts of PC on the physicochemical properties was discussed in detail. Chemical structures of the copolymers were confirmed by attenuated total reflection–Fourier transform infrared (ATR/FT-IR) spectroscopy. Thermo-mechanical properties of the synthesized materials were investigated by means of differential scanning calorimetry (DSC), thermogravimetric (TG/DTG) analyses, and dynamic mechanical analysis (DMA). The hardness of the obtained materials was also tested. In order to evaluate the surface of the materials, their images were obtained with the use of atomic force microscopy (AFM).

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Preparation and Characterization of Chitosan-Casein Phosphopeptides Biocomposite Coatings on the Medical Titanium Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.480-481.1065 ◽

2011 ◽

Vol 480-481 ◽

pp. 1065-1069

Author(s):

Bin Liu ◽

Lin Wang ◽

Yin Zhong Bu ◽

Sheng Rong Yang ◽

Jin Qing Wang

Keyword(s):

Photoelectron Spectroscopy ◽

Attenuated Total Reflectance ◽

Ti Alloy ◽

Force Microscopy ◽

Implant Materials ◽

Atomic Force ◽

Casein Phosphopeptides ◽

Potential Applications ◽

First Time

Titanium (Ti) and its alloys have been applied in orthopedics as one of the most popular biomedical metallic implant materials. In this work, to enhance the bioactivity, the surface of Ti alloy pre-modified by silane coupling agent and glutaraldehyde was covalently grafted with chitosan (CS) via biochemical multistep self-assembled method. Then, for the first time, the achieved surface was further immobilized with casein phosphopeptides (CPP), which are one group of bioactive peptides released from caseins in the digestive tract and can facilitate the calcium adsorption and usage, to form CS-CPP biocomposite coatings. The structure and composition of the fabricated coatings were characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) and atomic force microscopy (AFM). As the experimental results indicated, multi-step assembly was successfully performed, and the CS and CPP were assembled onto the Ti alloy surface orderly. It is anticipated that the Ti alloys modified by CS-CPP biocomposite coatings will find potential applications as implant materials in biomedical fields.

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