Electrically conductive and mechanically strong biomimetic chitosan/reduced graphene oxide composite films

Wang, Xiluan; Bai, Hua; Yao, Zhiyi; Liu, Anran; Shi, Gaoquan

doi:10.1039/c0jm01852j

Cited by 233 publications

(176 citation statements)

References 52 publications

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“…Composite fi lms of CS and rGO sheets with nacre-like layered structure were fabricated by vacuum fi ltration. [ 68 ] The results indicated that the uniform dispersion of rGO nanofi llers in the polymer matrices resulted in the high electrical properties of CS/rGO composite fi lms. In comparison to conventional fi lled polymers, graphene/polymer composites containing extremely lower graphene show superior electrical conductivity.…”

Section: Utilization Of the Electrical Properties Of Graphenementioning

confidence: 98%

Graphene‐Based Materials in Regenerative Medicine

Ding

Liu

Fan

2015

Adv Healthcare Materials

143

100

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Graphene possesses many unique properties such as two-dimensional planar structure, super conductivity, chemical and mechanical stability, large surface area, and good biocompatibility. In the past few years, graphene-based materials have risen as a shining star on the path of researchers seeking new materials for future regenerative medicine. Herein, the recent research advances made in graphene-based materials mostly utilizing the mechanical and electrical properties of graphene are described. The most exciting findings addressing the impact of graphene-based materials on regenerative medicine are highlighted, with particular emphasis on their applications including nerve, bone, cartilage, skeletal muscle, cardiac, skin, adipose tissue regeneration, and their effects on the induced pluripotent stem cells. Future perspectives and emerging challenges are also addressed in this Review article.

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Section: Utilization Of the Electrical Properties Of Graphenementioning

confidence: 98%

Graphene‐Based Materials in Regenerative Medicine

Ding

Liu

Fan

2015

Adv Healthcare Materials

143

100

View full text Add to dashboard Cite

show abstract

“…The amazing properties (self-polymerization, reduction, and adhesion) of dopamine make it possible to use it simultaneously as a reducing agent for GO and as an adhesive similar to the mortar in nacre to crosslink lamellar graphene in situ. Although nacre-like graphene composites have been fabricated using different approaches, [48][49][50] in our case, the resultant paper-like GC demonstrates stable superhydrophobicity, self-cleaning, and remarkable mechanical properties underwater, exhibiting multifunctional integration.…”

Section: Introductionmentioning

confidence: 97%

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

et al. 2013

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Multifunctional integration is an inherent characteristic for biological materials with multiscale structures. Learning from nature is an effective approach for scientists and engineers to construct multifunctional materials. In nature, mollusks (abalone), mussels, and the lotus have evolved different and optimized solutions to survive. Here, bio-inspired multifunctional graphene composite paper was fabricated in situ through the fusion of the different biological solutions from nacre (brick-and-mortar structure), mussel adhesive protein (adhesive property and reducing character), and the lotus leaf (self-cleaning effect). Owing to the special properties (self-polymerization, reduction, and adhesion), dopamine could be simultaneously used as a reducing agent for graphene oxide and as an adhesive, similar to the mortar in nacre, to crosslink the adjacent graphene. The resultant nacre-like graphene paper exhibited stable superhydrophobicity, self-cleaning, anticorrosion, and remarkable mechanical properties underwater. Multifunctional integration is an inherent characteristic for biological materials with multiscale structures.Learning from nature is an effective approach for scientists and engineers to construct multifunctional materials. In nature, mollusks (abalone), mussels, and the lotus have evolved different and optimized solutions to survive. Here, bio-inspired multifunctional graphene composite paper was fabricated in situ through the fusion of the different biological solutions from nacre (brick-and-mortar structure), mussel adhesive protein (adhesive property and reducing character), and the lotus leaf (self-cleaning effect).Owing to the special properties (self-polymerization, reduction, and adhesion), dopamine could be simultaneously used as a reducing agent for graphene oxide and as an adhesive, similar to the mortar in nacre, to crosslink the adjacent graphene. The resultant nacre-like graphene paper exhibited stable superhydrophobicity, self-cleaning, anti-corrosion, and remarkable mechanical properties underwater.

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“…19,20 More specifically, a number of authors have shown that the addition of GO can improve the mechanical properties of chitosan films significantly 21,22 and there are some reports on the effects of graphene oxide on the biocompatibility of graphene-chitosan composite films. 10,23 However, very little work has been done to study the effect of the addition of well dispersed, electrically conductive graphene nanosheets on the chitosan matrix.…”

Section: Introductionmentioning

confidence: 99%

Processable conducting graphene/chitosan hydrogels for tissue engineering

et al. 2015

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Composites of graphene in a chitosan-lactic acid matrix were prepared to create conductive hydrogels that are processable, exhibit tunable swelling properties and show excellent biocompatibility. The addition of graphene to the polymer matrix also resulted in significant improvements to the mechanical strength of the hydrogels, with the addition of just 3 wt% graphene resulting in tensile strengths increasing by over 200%. The composites could be easily processed into three-dimensional scaffolds with finely controlled dimensions using additive fabrication techniques and fibroblast cells demonstrate good adhesion and growth on their surfaces. These chitosan-graphene composites show great promise for use as conducting substrates for the growth of electro-responsive cells in tissue engineering. Composites of graphene in a chitosan-lactic acid matrix were prepared to create conductive hydrogels that are processable, exhibit tunable swelling properties and show excellent biocompatibility. The addition of graphene to the polymer matrix also resulted in significant improvements to the mechanical strength of the hydrogels, with the addition of just 3 wt% graphene resulting in tensile strengths increasing by over 200 %. The composites could be easily processed into threedimensional scaffolds with finely controlled dimensions using additive fabrication techniques and fibroblast cells demonstrate good adhesion and growth on their surfaces. These chitosan-graphene composites show great promise for use as conducting substrates for the growth of electro-responsive cells in tissue engineering.

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Electrically conductive and mechanically strong biomimetic chitosan/reduced graphene oxide composite films

Cited by 233 publications

References 52 publications

Graphene‐Based Materials in Regenerative Medicine

Graphene‐Based Materials in Regenerative Medicine

Fusion of nacre, mussel, and lotus leaf: bio-inspired graphene composite paper with multifunctional integration

Processable conducting graphene/chitosan hydrogels for tissue engineering

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