Poly(vinyl alcohol) nanocomposites containing reduced graphene oxide coated with tannic acid for humidity sensor

Lim, Min Young; Shin, Huiseob; Shin, Dong Myung; Lee, Sang Soo; Lee, Jong Chan

doi:10.1016/j.polymer.2015.12.048

Cited by 78 publications

(34 citation statements)

References 64 publications

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“…After TA coating, TA layer with hydroxyl groups formed onto the fiber surface can change fiber surface polarity and roughness significantly. Contact angles of CF@TA decrease to 49.86 in polar water and to 47 23. in diiodomethane compared to those of Untreated CF (78.50 and 58.91 ).…”

mentioning

confidence: 79%

“…[19][20][21][22] As a nontoxicity and low-cost natural polyphenol, tannic acid (TA) has attracted considerable interest owing to its desirable anchoring and coordinating ability by forming TA polymeric layers onto almost all types of substrates by pH-induced oxidative polymerization. [23][24][25][26] Massive catechol groups of TA can enhance surface wettability and chemical activity with matrix resin. In addition, based on Michael addition and Schiff base reactions between the catechol groups in TA and amino groups, some active amino containing species are chemically grafted onto the fiber surface under mild conditions.…”

Section: Introductionmentioning

confidence: 99%

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Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Cui

Liu²,

et al. 2020

Polymers for Advanced Techs

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The interfacial adhesion between carbon fibers (CFs) and matrix is mainly controlled by inherent surface structures and mutual wettability. However, CFs, with superior properties, have the low of surface wettability and activity. Changing the fiber surface can enhance the quality of interface, which expands the engineering application of CFs composites. Noticeably, the most traditional procedures involve the deterioration of fiber structure by multistep manipulation to introduce active sites, toxic reagents, high energy consumption, as well as the poor interfacial interaction between the fibers and the modified materials by the coating or deposition. Herein, an environmentally friendly and mild strategy was facilely designed via firmly coating tannic acid (TA, a renewable plant‐based polyphenol, the versatile adhesive) and then covalently grafted branched polyethyleneimine (PEI) onto the fiber surface. The novel grafting significantly increased fiber surface polarity, roughness and interfacial wettability without destroying surface microstructure, resulted in the sharp improvements in interlaminar shear strength (ILSS, 51.34 MPa) and interfacial shear strength (IFSS, 66.21 MPa). Impact strength and hydrothermal aging resistance of the resulting composites were also greatly increased. The hierarchical reinforcement arising from a promising and green strategy is facile to be prepared advanced polymer composites in multifunctional applications with the demand of highly interfacial properties and the usages of energy conservation.

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mentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Cui

Liu²,

et al. 2020

Polymers for Advanced Techs

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“…Compared with PI/GO and PI/PASP/GO-noncovalent composites, the pure PI and PI/PASP-GO-1/1 surface is quite smooth and without big remaining aggregates. The fractured surface of PI/PASP-GO-1/1 shows more striking plastic deformations with more vein patterns, which are often observed from the toughened resin materials with large mechanical behavior, 33,34 namely, the PASP-GO-1/1 nanofiller can develop the interfacial adhesion properties of PI matrix. The fractured surfaces of pure PI and PI-based composites obtained after the tensile test are shown in Figure 6(e-h).…”

Section: Morphology and Mechanical Property Of Pasp-modified Go/pi Comentioning

confidence: 92%

“…For the PI/ PASP/GO-noncovalent, many big flaky aggregates spread unevenly over on the fracture surface, due to the poor dispersibility of PASP/GO-noncovalent. The fractured surface of PI/PASP-GO-1/1 shows more striking plastic deformations with more vein patterns, which are often observed from the toughened resin materials with large mechanical behavior, 33,34 namely, the PASP-GO-1/1 nanofiller can develop the interfacial adhesion properties of PI matrix. The high efficiency of PASP-GO-1/1 can be attributed to its good dispersibility and strong interaction with PI resin.…”

Section: Morphology and Mechanical Property Of Pasp-modified Go/pi Comentioning

confidence: 92%

Effect of polyaspartic acid‐functionalized graphene oxide on the mechanical performance of polyimide‐based composites

Yuan

et al. 2019

J of Applied Polymer Sci

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Graphene oxide (GO) can improve the mechanical property of polymer matrix greatly. However, its poor dispersibility may considerably lower reinforcing efficiency. To address this problem, the environment-friendly polyaspartic acid (PASP) was adopted to modify GO through two generally modified methods: hydrogen bond adsorption and chemical graft modification. Findings indicate that the covalent bond grafted PASP-GO exhibits better dispersibility than the product by noncovalent method (PASP/GO-noncovalent). For chemically grafted PASP-GO, the nearly spherical polymer nanoparticles are formed on the GO nanosheets through self-polymerization, and its size can be well manipulated by adjusting the dosage of PASP so as to yield PASP-GO-1/4, PASP-GO-1/2, and PASP-GO-1/1 (mass ratio: m PASP /m GO = 1/4, 1/2, and 1/1); the corresponding diameters of these polymer aggregates are 56.4 AE 7.1, 90.1 AE 12.6, and 151.2 AE 16.1 nm. They are further utilized to reinforce polyimide matrix. Compared with the PASP-GO-1/2 and PASP-GO-1/1, the smaller PASP-GO-1/4 has better strengthening effect, due to its high specific surface area and dense distribution. This desirable fabrication of GO-based nanofillers provides a new avenue on the development of polymer matrix with comprehensive performances.

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“…The growing demands of controlling water vapor led to considerable interests in the development of sensing materials. In recent years, materials that have been studied for this purpose mainly include organic polymers [1][2][3][4], metal oxide ceramics [5][6][7][8][9][10], and porous materials [11][12][13][14][15]. Among the porous materials mesoporous silica SBA-15 exhibits good properties such as environment stability, wide range of work temperature, and quick response-recovery properties [13,14].…”

Section: Introductionmentioning

confidence: 99%

AC Humidity Sensing Properties of Mesoporous K₂CO₃-SiO₂Composite Materials

Guo

Chu

Gao

et al. 2016

Journal of Chemistry

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The mesoporous silica SBA-15 and mesoporous K2CO3-SiO2composite material were synthesized. Characterization of microstructure and morphology of materials indicated that the composite material had saved the porous framework of mesoporous silica SBA-15. Humidity sensing properties of different inverse proportion K2CO3-SiO2composite material were studied and we found that the sample with 0.16 g/g K2CO3exhibited excellent linearity in the wide humidity range. The complex impedance changed five orders of magnitude from 11% RH to 95% RH. The rapid response and recovery time were 10 s and 38 s, respectively. Finally a feasible ion transfer mechanism was brought forward to explain the sensing mechanism.

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Poly(vinyl alcohol) nanocomposites containing reduced graphene oxide coated with tannic acid for humidity sensor

Cited by 78 publications

References 64 publications

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Effect of polyaspartic acid‐functionalized graphene oxide on the mechanical performance of polyimide‐based composites

AC Humidity Sensing Properties of Mesoporous K₂CO₃-SiO₂Composite Materials

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Poly(vinyl alcohol) nanocomposites containing reduced graphene oxide coated with tannic acid for humidity sensor

Cited by 78 publications

References 64 publications

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Effect of polyaspartic acid‐functionalized graphene oxide on the mechanical performance of polyimide‐based composites

AC Humidity Sensing Properties of Mesoporous K2CO3-SiO2Composite Materials

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AC Humidity Sensing Properties of Mesoporous K₂CO₃-SiO₂Composite Materials