Variable self-assembly and in situ host–guest reaction of beta-cyclodextrin-modified graphene oxide composite Langmuir films with azobenzene compounds

Gao, Yagui; Jiao, Tifeng; Ma, Kai; Xing, Ronge; Zhang, Lexin; Zhou, Jingxin; Peng, Qiuming

doi:10.1039/c7ra07109d

Cited by 19 publications

(13 citation statements)

References 87 publications

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“…First, poly(β-cyclodextrin) (poly-CD) was synthesized according to the literature. − The final white product solid was obtained after freeze–drying process. The azobenzene-branched poly(acrylic acid) copolymer (PAA-Azo) was prepared according to our previous work .…”

Section: Methodsmentioning

confidence: 99%

Self-Assembled Hydrogels Based on Poly-Cyclodextrin and Poly-Azobenzene Compounds and Applications for Highly Efficient Removal of Bisphenol A and Methylene Blue

et al. 2018

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The excellent physical and chemical properties of cyclodextrin polymer (poly-CD)/azobenzene-modified polyacrylic acid (PAA-Azo) binary composite hydrogels have been designed and prepared. The prepared hydrogels were subjected to a variety of characterizations, including scanning electron microscopy, ultraviolet spectroscopy, circular dichroism spectroscopy, infrared spectroscopy, rheological properties, and specific surface area tests. It was found that the obtained hydrogels have the cross-linked three-dimensional porous network nanostructures, and the formed composite poly-CD/PAA-Azo hydrogel can basically be shear thinned and have good recovery performance. A process of gel–sol transition can occur when the gel has a stimulatory response under UV light irradiation. In addition, such excellent properties of hydrogels exhibit different mechanisms in the adsorption of organic molecules that are harmful to the environment, such as bisphenol A (BPA) and methylene blue (MB). The polymeric hydrogel serves as novel adsorbent agents to adsorb BPA via host–guest interaction and anchor MB via electrostatic interaction and hydrogen bonding.

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Section: Methodsmentioning

confidence: 99%

Self-Assembled Hydrogels Based on Poly-Cyclodextrin and Poly-Azobenzene Compounds and Applications for Highly Efficient Removal of Bisphenol A and Methylene Blue

et al. 2018

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“…So the appearance of the clothing is still roughly coordinated. e composition of different materials, specifically the combination of delicate and coarse materials, transparency, and opacity, highlights the characteristics of the work [16]. Using the texture changes of various materials is also an important way to enrich the overall texture of clothing.…”

Section: Composition Of Traditionalmentioning

confidence: 99%

Heating Properties of Graphene Oxide Nanosheets and Their Application in Clothing Design

Luan

2022

Advances in Materials Science and Engineering

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Graphene oxide nanosheets are nanomaterials with a layered structure, which have good thermal conductivity and heat dissipation. This article aims to integrate it into clothing design to alleviate the existing contradictions in the development of the clothing market. In this article, an overview of clothing design is firstly suggested, and then the structure and properties of graphene oxide nanosheets are expounded. A comparative test was carried out in terms of style and mechanical properties. The results showed that the thermal conductivity of graphene oxide clothing materials was maintained at a maximum of about 37.8°C, and the heat dissipation performance could be maintained at a minimum of about 27.1°C, which fully verified its operability. Popularizing it in the current stage of clothing design can effectively improve the performance and comfort of clothing.

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“…The first peak is located at 304 nm with a shoulder at approximately 340 nm, which is characteristic of the π–π* transition of rGO. , The second and third peaks at 544 and 620 nm were attributed to the polaronic state of the nanocomposite, generated by the presence of rGO . The existence of an absorption peak attributed to the polaronic state of the nanocomposite film (544–620 nm) is indicative of the increased number of distortions in the polymer chain, , which results in an increase in the electron conductivity performance of the poly(azo-BBY)-rGO nanocomposite film compared to the poly(azo-BBY) film, as verified in a previous study conducted by our research group . By employing Tauc’s relationship, it was possible to calculate the band gap ( E gap ) of the allowed direct transitions of the polymeric film and the constructed nanocomposite film (Figure B,C). − There was a significant decrease in the band gap value for the trans form in the nanocomposite film (2.66 eV) compared to the polymer-only film (3.06 eV).…”

Section: Resultsmentioning

confidence: 99%

Mechanism of Nanocomposite Formation in the Layer-by-Layer Single-Step Electropolymerization of π-Conjugated Azopolymers and Reduced Graphene Oxide: An Electrochemical Impedance Spectroscopy Study

2020

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This work presents a study of the formation mechanism of electrochemically deposited alternating layers of azopolymer and graphene oxide, as well as a systematic study of the physicochemical characteristics of the resulting nanocomposite films by electrochemical impedance spectroscopy. The nanocomposite films were constructed by cyclic electropolymerization, which allowed for the assembly of thin films with alternating azopolymers and reduced graphene oxide (rGO) layers in one step. Morphological characterizations were performed by atomic force microscopy and scanning electron microscopy and verified that the electrodeposition of the poly(azo-BBY) polymeric film occurred during the anodic sweep, and the deposition of graphene oxide sheets took place during the cathodic sweep. By analyzing the electrochemical impedance spectra using equivalent circuit models, variations in the resistance and capacitance values of the system were monitored as a function of the amount of electrodeposited material on the fluorine doped tin oxide electrode. In addition, the interfacial phenomena that occurred during the electroreduction of the rGO sheets were monitored with the same method.

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Variable self-assembly and in situ host–guest reaction of beta-cyclodextrin-modified graphene oxide composite Langmuir films with azobenzene compounds

Abstract: Different composite Langmuir films (GO–CD/N-Azo and GO–CD/PAA-Azo) are prepared via simple interfacial self-assembly process and host–guest reaction, demonstrating variable self-assembly for wide applications.

Cited by 19 publications

References 87 publications

Self-Assembled Hydrogels Based on Poly-Cyclodextrin and Poly-Azobenzene Compounds and Applications for Highly Efficient Removal of Bisphenol A and Methylene Blue

Self-Assembled Hydrogels Based on Poly-Cyclodextrin and Poly-Azobenzene Compounds and Applications for Highly Efficient Removal of Bisphenol A and Methylene Blue

Heating Properties of Graphene Oxide Nanosheets and Their Application in Clothing Design

Mechanism of Nanocomposite Formation in the Layer-by-Layer Single-Step Electropolymerization of π-Conjugated Azopolymers and Reduced Graphene Oxide: An Electrochemical Impedance Spectroscopy Study

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