One-pot fabrication of cellulose-collagen fibrous networks for potential use as wound dressing: From characterization to first evaluation of cytocompatibility

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2501-2511
Author(s):  
Wei Xu ◽  
Die Zhang ◽  
Jie Cai ◽  
Shui-Yuan Cheng ◽  
Wen-Ping Ding
Keyword(s):  
Wound Dressing ◽  
Composite Membranes ◽  
Gravimetric Analysis ◽  
Self Healing ◽  
One Pot ◽  
Collagen Hydrolysate ◽  
Element Analysis ◽  
Good Thermal Stability ◽  
Nanofibrous Membranes ◽  
Potential Use

Biomedical researchers have been attempting to construct a wound dressing with the structure and function of a bionic natural extracellular matrix. This dressing would provide a comfortable environment for wound self-healing. In this study, cellulose-collagen fibrous networks were easily fabricated via the one-pot method using genipin in situ crosslinking collagen hydrolysate in cellulose nanofibrous membranes made by electrospinning cellulose acetate and subsequent deacetylation. The morphology, properties, and successful entrapment of collagen in the cellulose fibrous dressings were validated by scanning electron microscopy, element analysis, Fourier transform infrared spectroscopy, X-ray diffraction, water-swelling test, and thermal gravimetric analysis. The functional cellulose nanofiber-based composite membranes exhibited a network structure, good thermal stability, and acceptable water resistance. Human epidermal cells seeded on the composite nanofibrous membranes presented favorable growth, indicating good cytocompatibility and suitability of the dressing to the wound. Therefore, these novel cellulose-collagen fibrous networks may have potential use in biomedical applications.

Preparation and characterization of phenolphthalein polyethersulfone/silica nanofibrous membranes by solution blowing

2018 ◽  
Vol 32 (6) ◽  
pp. 746-760 ◽  
Author(s):  
Guocheng Song ◽  
Yang Chen ◽  
Jing Zhu ◽  
Junrong Yu ◽  
Yan Wang ◽  
...  
Keyword(s):  
Pure Water ◽  
Composite Membranes ◽  
Contact Angles ◽  
Attenuated Total Reflectance ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Water Contact ◽  
Solution Blowing ◽  
Nanofibrous Membranes

Phenolphthalein polyethersulfone (PES-C)/silica (SiO2) composite nanofibrous membranes were prepared via solution blowing. The spinning solutions were prepared by mixing a solution of PES-C in dimethylacetamide with different amounts of colloidal SiO2 in ethylene glycol. Attenuated total reflectance–Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, scanning electron microscopy, thermal gravimetric analysis, and water contact angles were conducted to characterize the properties of composite nanofibrous membranes. The results showed that the thermal properties and surface wettability were improved by the addition of appropriate amount of nano-SiO2. Furthermore, permeation fluxes of pure water and the filtration of starch suspension were measured to evaluate the antifouling property of the PES-C/SiO2 composite membranes.

Hydrophilic porous polyimide/β-cyclodextrin composite membranes with enhanced gas separation performance and low dielectric constant

2017 ◽  
Vol 30 (4) ◽  
pp. 446-455 ◽  
Author(s):  
Zehan Liu ◽  
Long Pang ◽  
Qing Li ◽  
Shulai Zhang ◽  
Jing Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Gas Adsorption ◽  
Composite Films ◽  
Tensile Modulus ◽  
Composite Membranes ◽  
Separation Performance ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Good Thermal Stability

A series of co-polyimide (PI)/modified β-cyclodextrin (β-CD) composites were successfully fabricated from anhydride-terminated PI and (3-aminopropyl)triethoxysilane-modified β-CD (β-ACD). Co-PI was prepared from 4,4′-oxydianiline, 4,4′-(hexafluoroisopropylidene) diphthalic anhydride, and 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride by chemical imidization. Different amounts of β-ACD (0, 1, 3, 5, and 7 wt%) were introduced into co-PI via strong covalent interactions between the terminal anhydride and amino groups. The structures and properties of the composites were characterized by means of Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, thermal gravimetric analysis, differential scanning calorimetry, dynamic thermomechanical analysis, mechanical properties tests, and contact angle tests. The results showed that β-ACD was successfully grafted on the PI segment. The composite films showed good thermal stability, glass transition temperatures between 244°C and 254°C, and 10% weight loss at temperatures of 514°C–545°C and 506°C–538°C in nitrogen and air atmosphere, respectively. They also exhibited excellent mechanical properties with tensile strength, tensile modulus, and elongation at break values of 78–111 MPa, 1.14–2.05 GPa, and 8–17%, respectively. All of these values were maximized at a β-ACD content of 1 wt%. The water uptake of the composites films was more than 1%, indicating that the addition of β-ACD can enhance the water absorption of PI films. All of these composite films are porous, and the contact angle indicated that the addition of β-ACD increased the hydrophilicity of the composite film. When the β-ACD doping content reached 7 wt%, the contact angle reached a minimum of 63°. All of the membranes were thermally annealed at 300°C for 1 h, after which gas adsorption tests showed that the composite films have enhanced CO2/CH4 selectivity, which can reach 12.7 (308 K).

Synthesis and Luminescence Properties of Tris (8-Hydroxyquinoline) Iron Spindle-Like Structures at Room Temperature

2011 ◽  
Vol 391-392 ◽  
pp. 225-229 ◽  
Author(s):  
Qing Hong Kong ◽  
Hong Liu ◽  
Yun Long Zhang ◽  
Yong Sheng Yan
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Blue Shift ◽  
Solvent System ◽  
Iron Complex ◽  
Molecular Formula ◽  
Gravimetric Analysis ◽  
Element Analysis ◽  
Transmission Electron ◽  
Fourier Transformation Infrared Spectroscopy

Spindle-like bis (8-hydroxyquinoline) iron (FeQ3) complex has been synthesized with a facile method in a mixed solvent system at room temperature for 12 h. The molecular formula of the products is speculated by the C, H and N element analysis and thermal gravimetric analysis, and Fourier-transformation infrared spectroscopy was also utilized to measure its structure, which further confirm the molecular formula of the products. The observation of field emission scanning electron microscopy and transmission electron microscopy shows that the morphology of tris (8-hydroxyquinoline) iron complex is spindle-like structure. The photoluminescence of the products were also investigated. The results indicate that the photoluminescence emission of FeQ3spindles shows obvious blue shift contrasted with that of 8-hydroxyquinoline.

Electrospun Sandwich-Structure Composite Membranes for Wound Dressing Scaffolds with High Antioxidant and Antibacterial Activity

2017 ◽  
Vol 303 (2) ◽  
pp. 1700270 ◽  
Author(s):  
Jinzhen Li ◽  
Yang Hu ◽  
Ting He ◽  
Mengwen Huang ◽  
Xiangchao Zhang ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Wound Dressing ◽  
Sandwich Structure ◽  
Composite Membranes

Decellularized liver-regenerative 3D printing biomaterials for cell-based liver therapies via a designed procedure combined with papain-containing reagent treatments and supercritical fluids

2021 ◽  
pp. 1-8
Author(s):  
Ching-Cheng Huang
Keyword(s):  
3D Printing ◽  
Thermo Gravimetric Analysis ◽  
Extraction Process ◽  
Gravimetric Analysis ◽  
Collagen Scaffolds ◽  
Scanning Calorimetry ◽  
Porcine Liver ◽  
Good Thermal Stability ◽  
Decellularized Liver ◽  
Liver Collagen

BACKGROUND: The biologic scaffolds derived from decellularized tissues and organs have been successfully developed in a variety of preclinical and/or clinical studies. OBJECTIVE: The new decellularized liver-regenerative 3D printing biomaterials were designed and prepared for cell-based liver therapies. METHODS: An extraction process was employed to remove the tissue and cellular molecules from porcine liver via pretreatment of supercritical fluid of carbon dioxide (ScCO2). Varying porosities of the decellularized liver tissues were created using papain-containing reagent treatments after ScCO2. RESULTS: The resulting liver-regenerative 3D printing biomaterials of decellularized liver collagen scaffolds were characterized by Fourier transform infrared spectroscopy, thermo-gravimetric analysis, differential scanning calorimetry and scanning electron microscopy. CONCLUSIONS: The decellularized liver collagen scaffolds with good thermal stability (>150 °C) were obtained and employed as liver-regenerative 3D printing biomaterials for cell-based liver therapies.

scholarly journals Radiation sterilization of Honey and Honey-Alginate Wound Dressing from Stingless Bee (Tetragonula biroi) Collected from Sta. Maria, Laguna, Philippines

2021 ◽  
Vol 11 (2) ◽  
pp. 217-223
Author(s):  
Davison Baldos ◽  
◽  
Joseph Puno ◽  
Levelyn Tolentino ◽  
Djowel Montefalcon ◽  
...  
Keyword(s):  
Electron Beam ◽  
Physicochemical Properties ◽  
Wound Dressing ◽  
Transmission Rate ◽  
Wound Care ◽  
Stingless Bee ◽  
Soluble Solids ◽  
Radiation Sterilization ◽  
Fluid Handling ◽  
Potential Use

This study was conducted to determine the effect of radiation sterilization on alginate wound dressing containing honey from the Philippine stingless bee, Tetragonula biroi. Our results show that a radiation dose of 30 kGy did not affect the antibacterial property of honey against Staphylococcus aureus. Electron-beam irradiation did not produce significant alterations in the physicochemical properties (pH, total soluble solids, and flavonoids); however, the total phenolics was significantly increased in honey with higher irradiation doses. Demonstrating that irradiation can be applied to honey with negligible physicochemical effects, honey was incorporated in alginate and exposed to a sterilization dose of 25 kGy using an electron beam facility. Irradiation did not affect the physicochemical properties (pH, moisture content, gel fraction, moisture vapor transmission rate (MVTR), and fluid handling capacity) of the honey alginate wound dressing (HAWD). The perspectives for the potential use of irradiated HAWD as a natural product-based substitute for commercial wound care products may be considered.

Behavior of Congruent Tessellation Stacks Under Torsional Loading

2016 ◽  
Author(s):  
Yves Klett ◽  
Fabian Muhs ◽  
Peter Middendorf
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Degree Of Freedom ◽  
Simple Solution ◽  
Torsional Loading ◽  
Element Analysis ◽  
Torsional Loads ◽  
Structural Mechanisms ◽  
Potential Use

The combination of several layers of rigidly foldable tessellations into can produce cellular material stacks with interesting properties, especially if the resulting stack preserves the mobility of its constituting layers. To achieve this, the construction of functional joining and hinging concepts need to be developed. This paper presents a simple solution to effectively joining different 1-DOF (degree of freedom) tessellation layers. The mechanical properties of the resulting structures under torsional loads are evaluated using finite element analysis, and their potential use as structural mechanisms is discussed.

Preparation, Characterization and UV Absorption of Phosphotungstic Acid Cerium

2014 ◽  
Vol 1061-1062 ◽  
pp. 328-332
Author(s):  
Hai Lian Yu ◽  
Zhen Hu
Keyword(s):  
Phosphotungstic Acid ◽  
Absorption Capacity ◽  
Uv Absorption ◽  
Precipitation Method ◽  
Gravimetric Analysis ◽  
X Ray ◽  
Good Thermal Stability ◽  
Infrared Spectrometer ◽  
The Fourier Transform ◽  
Fluorescence Spectrometer

Phosphotungstic acid cerium [CePW12O40] was prepared with phosphotungstic acid and hydrate cerium nitrate by precipitation method. The Fourier transform infrared spectrometer, X-ray diffractometer, X-ray fluorescence spectrometer and thermal gravimetric analysis were used to characterize product, The UV-VIS spectrophotometer was used to measure its absorption capacity. The results showed that the prepared product is CePW12O40, it has good crystal and good thermal stability, its purity reaches 99.55%, there is good UV absorption property between 200nm and 260nm..

Porous boron nitride nanofibers as effective nanofillers for poly(vinyl alcohol) composite hydrogels with excellent self-healing performances

Soft Matter ◽  
2022 ◽  
Author(s):  
Xiangqian Gao ◽  
Tiantian Deng ◽  
Xindi Huang ◽  
Mengmeng Yu ◽  
Danyang Li ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Self Healing ◽  
One Pot ◽  
One Dimensional ◽  
Composite Hydrogels ◽  
Assembly Method

A new composite hydrogels with excellent self-healing properties was prepared by combining poly(vinyl alcohol) (PVA) and boron nitride nanofibers (BNNFs) via a facile one-pot assembly method. One-dimensional porous BNNFs with...

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