The influence of applied silica nanoparticles on a bio-renewable castor oil based polyurethane nanocomposite and its physicochemical properties

2014 ◽  
Vol 16 (20) ◽  
pp. 9276-9288 ◽  
Author(s):  
Kamal Mohamed Seeni Meera ◽  
Rajavelu Murali Sankar ◽  
Jaya Paul ◽  
Sellamuthu N. Jaisankar ◽  
Asit Baran Mandal
Keyword(s):  
Mechanical Properties ◽  
Physicochemical Properties ◽  
Silica Nanoparticles ◽  
Castor Oil ◽  
Nanocomposite Films ◽  
Silica Nanocomposite

Bio-renewable castor oil polyurethane–silica nanocomposite films with improved thermal, surface and mechanical properties were prepared. These films find application in biomaterials development.

Elaboration and Characterization of a Novel Biobased Poly(Furfurylalcohol)/Silica Nanocomposite

2013 ◽  
Vol 747 ◽  
pp. 657-659
Author(s):  
Nicolas Bosq ◽  
Nathanaël Guigo ◽  
Jacques Persello ◽  
Nicolas Sbirrazzuoli
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Silica Nanoparticles ◽  
Silica Nanoparticle ◽  
Surface Modifications ◽  
Thermal And Mechanical Properties ◽  
Experimental Conditions ◽  
Silica Nanocomposite

The modified PFA via silica nanoparticle insertion was studied under different experimental conditions. In the key step, thermal and mechanical properties variations of the material (thermal stability, vitrification) were closely correlated with the type of the silica nanoparticles employed. To reach the results, thermal analytical experiment were conducted such as TGA or DMTA. Moreover, the silica nanoparticles surface modifications were highlighted from TGA and FTIR. Their morphology and dispersion into the polymer were shown by TEM measurements.

scholarly journals Injectable, self-healing mesoporous silica nanocomposite hydrogels with improved mechanical properties

Nanoscale ◽  
2021 ◽  
Author(s):  
A. Zengin ◽  
J. P. O. Castro ◽  
P. Habibovic ◽  
S. H. van Rijt
Keyword(s):  
Mechanical Properties ◽  
Mesoporous Silica ◽  
Mechanical Strength ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Self Healing ◽  
Peg Hydrogels ◽  
Nanocomposite Hydrogels ◽  
Promising Strategy ◽  
Silica Nanocomposite

Nanocomposites created by dynamic crosslinking of mesoporous silica nanoparticles to PEG hydrogels represents a promising strategy to confer mechanical strength and rapid self-healing capabilities to hydrogels.

Physicochemical properties of starch nanocomposite films enhanced by self-assembled potato starch nanoparticles

LWT ◽  
2016 ◽  
Vol 69 ◽  
pp. 251-257 ◽  
Author(s):  
Suisui Jiang ◽  
Chengzhen Liu ◽  
Xiaojin Wang ◽  
Liu Xiong ◽  
Qingjie Sun
Keyword(s):  
Physicochemical Properties ◽  
Potato Starch ◽  
Nanocomposite Films ◽  
Starch Nanoparticles ◽  
Self Assembled

scholarly journals Is Dialdehyde Chitosan a Good Substance to Modify Physicochemical Properties of Biopolymeric Materials?

2021 ◽  
Vol 22 (7) ◽  
pp. 3391
Author(s):  
Sylwia Grabska-Zielińska ◽  
Alina Sionkowska ◽  
Ewa Olewnik-Kruszkowska ◽  
Katarzyna Reczyńska ◽  
Elżbieta Pamuła
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Physicochemical Properties ◽  
Silk Fibroin ◽  
Three Dimensional ◽  
Microscopy Imaging ◽  
Maximum Deformation ◽  
One Step ◽  
Chitosan Blends ◽  
Fourier Transfer Infrared Spectroscopy

The aim of this work was to compare physicochemical properties of three dimensional scaffolds based on silk fibroin, collagen and chitosan blends, cross-linked with dialdehyde starch (DAS) and dialdehyde chitosan (DAC). DAS was commercially available, while DAC was obtained by one-step synthesis. Structure and physicochemical properties of the materials were characterized using Fourier transfer infrared spectroscopy with attenuated total reflectance device (FTIR-ATR), swelling behavior and water content measurements, porosity and density observations, scanning electron microscopy imaging (SEM), mechanical properties evaluation and thermogravimetric analysis. Metabolic activity with AlamarBlue assay and live/dead fluorescence staining were performed to evaluate the cytocompatibility of the obtained materials with MG-63 osteoblast-like cells. The results showed that the properties of the scaffolds based on silk fibroin, collagen and chitosan can be modified by chemical cross-linking with DAS and DAC. It was found that DAS and DAC have different influence on the properties of biopolymeric scaffolds. Materials cross-linked with DAS were characterized by higher swelling ability (~4000% for DAS cross-linked materials; ~2500% for DAC cross-linked materials), they had lower density (Coll/CTS/30SF scaffold cross-linked with DAS: 21.8 ± 2.4 g/cm3; cross-linked with DAC: 14.6 ± 0.7 g/cm3) and lower mechanical properties (maximum deformation for DAC cross-linked scaffolds was about 69%; for DAS cross-linked scaffolds it was in the range of 12.67 ± 1.51% and 19.83 ± 1.30%) in comparison to materials cross-linked with DAC. Additionally, scaffolds cross-linked with DAS exhibited higher biocompatibility than those cross-linked with DAC. However, the obtained results showed that both types of scaffolds can provide the support required in regenerative medicine and tissue engineering. The scaffolds presented in the present work can be potentially used in bone tissue engineering to facilitate healing of small bone defects.

Feasible strategies to promote the sensing performances of spinel MCo2O4 (M = Ni, Fe, Mn, Cu and Zn) based electrochemical sensors: A review

2021 ◽  
Author(s):  
Josué M. Gonçalves ◽  
Diego Pessoa Rocha ◽  
Murillo N.T. Silva ◽  
Paulo Roberto Martins ◽  
Edson Nossol ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physicochemical Properties ◽  
Electrochemical Sensors ◽  
Combined Effects ◽  
Cu And Zn

Spinel MCo2O4 (M = Ni, Fe, Mn, Cu and Zn) demonstrates excellent physicochemical properties due to combined effects of M2+ and Co2+ cations. Their inimitable optical, electronic, and mechanical properties...

scholarly journals Enhancing the mechanical properties and cytocompatibility of magnesium potassium phosphate cement by incorporating oxygen-carboxymethyl chitosan

2020 ◽  
Author(s):  
Changtian Gong ◽  
Shuo Fang ◽  
Kezhou Xia ◽  
Jingteng Chen ◽  
Liangyu Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physicochemical Properties ◽  
Bone Cement ◽  
Ph Value ◽  
Setting Time ◽  
Potassium Phosphate ◽  
Carboxymethyl Chitosan ◽  
Bioactive Substances ◽  
Magnesium Potassium Phosphate Cement

Abstract Incorporating bioactive substances into synthetic bioceramic scaffolds is challenging. In this work, oxygen-carboxymethyl chitosan (O-CMC), a natural biopolymer that is nontoxic, biodegradable and biocompatible, was introduced into magnesium potassium phosphate cement (K-struvite) to enhance its mechanical properties and cytocompatibility. This study aimed to develop O-CMC/magnesium potassium phosphate composite bone cement (OMPC), thereby combining the optimum bioactivity of O-CMC with the extraordinary self-setting properties and mechanical intensity of the K-struvite. Our results indicated that O-CMC incorporation increased the compressive strength and setting time of K-struvite and decreased its porosity and pH value. Furthermore, OMPC scaffolds remarkably improved the proliferation, adhesion and osteogenesis related differentiation of MC3T3-E1 cells. Therefore, O-CMC introduced suitable physicochemical properties to K-struvite and enhanced its cytocompatibility for use in bone regeneration.

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