Preparation and Mechanical Properties of Chitosan/Carbon Nanotubes Composites

Wang, Shaofeng; Shen, Lu; Zhang, Wei-De; Tong, Yuping

doi:10.1021/bm050378v

Cited by 594 publications

(340 citation statements)

References 46 publications

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“…In addition, it has been demonstrated that hydrogen bonds can be formed among SWNTs and chitosan, thus allowing them to form a strong matrix with stronger mechanical properties for loadbearing applications. 9,38 Another advantage of B-SWCNT is their improved electrical conductivity. It is well known that electrical stimulation can promote osteogenesis at defective bone sites so B-SWCNT, with their improved electrical conductivity and excellent cytocompatibility properties, hold great potential for application in bone tissue engineering.…”

Section: A B C Dmentioning

confidence: 99%

Biomimetic three-dimensional nanocrystalline hydroxyapatite and magnetically synthesized single-walled carbon nanotube chitosan nanocomposite for bone regeneration

Li²,

Wang³

et al. 2012

IJN

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Background: Many shortcomings exist in the traditional methods of treating bone defects, such as donor tissue shortages for autografts and disease transmission for allografts. The objective of this study was to design a novel three-dimensional nanostructured bone substitute based on magnetically synthesized single-walled carbon nanotubes (SWCNT), biomimetic hydrothermally treated nanocrystalline hydroxyapatite, and a biocompatible hydrogel (chitosan). Both nanocrystalline hydroxyapatite and SWCNT have a biomimetic nanostructure, excellent osteoconductivity, and high potential to improve the load-bearing capacity of hydrogels. Methods: Specifically, three-dimensional porous chitosan scaffolds with different concentrations of nanocrystalline hydroxyapatite and SWCNT were created to support the growth of human osteoblasts (bone-forming cells) using a lyophilization procedure. Two types of SWCNT were synthesized in an arc discharge with a magnetic field (B-SWCNT) and without a magnetic field (N-SWCNT) for improving bone regeneration. Results: Nanocomposites containing magnetically synthesized B-SWCNT had superior cytocompatibility properties when compared with nonmagnetically synthesized N-SWCNT. B-SWCNT have much smaller diameters and are twice as long as their nonmagnetically prepared counterparts, indicating that the dimensions of carbon nanotubes can have a substantial effect on osteoblast attachment. Conclusion: This study demonstrated that a chitosan nanocomposite with both B-SWCNT and 20% nanocrystalline hydroxyapatite could achieve a higher osteoblast density when compared with the other experimental groups, thus making this nanocomposite promising for further exploration for bone regeneration.

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Section: A B C Dmentioning

confidence: 99%

Biomimetic three-dimensional nanocrystalline hydroxyapatite and magnetically synthesized single-walled carbon nanotube chitosan nanocomposite for bone regeneration

Li²,

Wang³

et al. 2012

IJN

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“…To date, cross-linking techniques have been used to increase mechanical strength of hydrogels, but these techniques result in only a moderate enhancement and sometimes even a lowered adsorption capacity 9 . Recently, carbon nanotubes (CNTs) have received special interest as one of the most promising nano-fi llers into polymer matrices for enhancement of its mechanical property [10][11][12] . In fact, as a result of the early report concerning the preparation of a CNTs/polymer composite by Ajayan et al 13 , many efforts have been made to combine CNTs and polymers to produce functional composite materials with superior properties 14, 15 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution

Hosseinzadeh

2015

Polish Journal of Chemical Technology

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A novel polysaccharide-based hydrogel nanocomposite was prepared using grafting of acrylic acid (AA) on to kappa-carrageenan (κC) by incorporating multi-walled carbon nanotube (MCNT). In fact, MCNTs were used as nano-sized reinforcements in the synthesized nanocomposite. Spectroscopy together with morphology proved relatively strong κC-MCNT interaction. Besides, the swelling behavior of the nanocomposite hydrogel was studied. The results showed that in the presence of MCNTs, the equilibrium swelling capacity was decreased. This can be attributed to cross-linking role and hydrophilicity nature of MCNTs. The adsorption performance of hydrogel nanocomposite was also investigated for the removal of crystal violet (CV) as a cationic dye. The effects of some important parameters such as MCNT concentration, pH and contact time on the uptake of CV solution were studied. Equilibrium adsorption isotherm data of the hydrogel exhibited better fi t to the Langmuir than to the Freundlich isotherm model. According to this model, the maximum adsorption capacity of κC-based hydrogel nanocomposite was found to be 118 mg . g -1.

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“…[15][16][17][18] Poly(L-lactide) (PLLA) has attracted much attention because it is biodegradable, biocompatible, producible from renewable resources, and nontoxic to the human body and the environment. Recent innovation on the production process has lowered significantly the production cost, which further stimulates the studies on its property and potential applications.…”

Section: Introductionmentioning

confidence: 99%

Effect of Functionalization of Multiwalled Nanotubes on the Crystallization and Hydrolytic Degradation of Biodegradable Poly(l-lactide)

2008

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Biodegradable poly(L-lactide) (PLLA)/multiwalled carbon nanotubes (MWNTs) nanocomposites were prepared via solution blending using two kinds of MWNTs, i.e., pristine multiwalled carbon nanotubes (p-MWNTs) and carboxyl-functionalized multiwalled carbon nanotubes (f-MWNTs). Various techniques were used to investigate the functionalization of MWNTs on the morphology, crystallization, and hydrolytic degradation of PLLA in the nanocomposites. Both MWNTs show fine dispersion in the PLLA matrix; however, the dispersion of f-MWNTs is better than that of p-MWNTs. The incorporation of MWNTs accelerates the crystallization of PLLA in the nanocomposites due to the heterogeneous nucleation effect; furthermore, the crystallization rate of PLLA is faster in the PLLA/f-MWNTs nanocomposite than in the PLLA/p-MWNTs nanocomposite. The exciting aspect of this research is that the hydrolytic degradation of PLLA is enhanced after nanocomposites preparation.

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Preparation and Mechanical Properties of Chitosan/Carbon Nanotubes Composites

Cited by 594 publications

References 46 publications

Biomimetic three-dimensional nanocrystalline hydroxyapatite and magnetically synthesized single-walled carbon nanotube chitosan nanocomposite for bone regeneration

Biomimetic three-dimensional nanocrystalline hydroxyapatite and magnetically synthesized single-walled carbon nanotube chitosan nanocomposite for bone regeneration

Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution

Effect of Functionalization of Multiwalled Nanotubes on the Crystallization and Hydrolytic Degradation of Biodegradable Poly(l-lactide)

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