Anisotropic nanocomposite films of hydroxypropylcellulose and graphene oxide with multi-responsiveness

Ying, Zhimin; Xiang, Lin; Du, Cong; Zheng, Si Yu; Wu, Zi Liang; Zheng, Qiang

doi:10.1039/c9ra04558a

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…Developing moisture-based energy-harvesting technologies has attracted extensive and intense attention attributed to its great application potential in both energy-related − and wearable electronics fields. ,, The key to achieving energy transduction depends on using advanced materials as the media . Smart materials, as a new generation of advanced materials, can undergo a reversible property change by external stimuli, such as heat, − electricity, , light, − magnetism, , and moisture. ,, Recently, moisture-responsive smart materials have attracted widespread interest. As pioneering works, many efforts had been made to fabricate humidity-sensitive devices based on smart materials, including cellulose nanofibers, , poly pyrrole, ,, graphene, ,− carbon nanotubes, poly dopamine, supramolecular crystals, and so on. , Anisotropic and reversible absorption–desorption of water vapor by these actuators resulted in an impressive mechanical response.…”

Section: Introductionmentioning

confidence: 99%

“…8 Smart materials, as a new generation of advanced materials, can undergo a reversible property change by external stimuli, such as heat, 9−12 electricity, 13,14 light, 15−18 magnetism, 19,20 and moisture. 2,21,22 Recently, moisture-responsive smart materials have attracted widespread interest. As pioneering works, many efforts had been made to fabricate humidity-sensitive devices based on smart materials, including cellulose nanofibers, 23,24 poly pyrrole, 2,25,26 graphene, 21,27−29 carbon nanotubes, 24 poly dopamine, 30 supramolecular crystals, 31 and so on.…”

Section: ■ Introductionmentioning

confidence: 99%

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Fabrication of Moisture-Responsive Crystalline Smart Materials for Water Harvesting and Electricity Transduction

et al. 2021

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It is of profound significance with regard to the global energy crisis to develop new techniques and materials that can convert the chemical potential of water into other forms of energy, especially electricity. To address this challenge, we built a new type of energy transduction pathway (humidity gradients → mechanical work → electrical power) using moisture-responsive crystalline materials as the media for energy transduction. Single-crystal data revealed that a flexible zeolitic pyrimidine framework material, ZPF-2-Co, could undergo a reversible structural transformation (β to α phase) with a large unit cell change upon moisture stimulus. Dynamic water vapor sorption analysis showed a gate-opening effect with a steep uptake at as low as 10% relative humidity (RH). The scalable green synthesis approach and the fast water vapor adsorption–desorption kinetics made ZPF-2-Co an excellent sorbent to harvest water from arid air, as verified by real water-harvesting experiments. Furthermore, we created a gradient distribution strategy to fabricate polymer-hybridized mechanical actuators based on ZPF-2-Co that could perform reversible bending deformation upon a variation of the humidity gradient. This mechanical actuator showed remarkable durability and reusability. Finally, coupling the moisture-responsive actuator with a piezoelectric transducer further converted the mechanical work into electrical power. This work offers a new type of moisture-responsive smart material for energy transduction and provides an in-depth understanding of the responsive mechanism at the molecular level.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Fabrication of Moisture-Responsive Crystalline Smart Materials for Water Harvesting and Electricity Transduction

et al. 2021

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“…These macromolecules can interact with a range of polymeric and ionic species via hydroxyl groups in many different approaches, from biosensors to photovoltaic cell technologies. [16,17] Therefore, the combination of different proportions of zein and HPC with different concentrations of clay was tested to optimize the performance of nanocomposites/composites as a potential material for food packaging. In this work, we have selected two potential zein/HPC/PG formulations among others that we developed and that proved to be more adequate in terms of manipulation, transparency and macroscopic homogeneity of the films, for instance, Biofilm A composed of 46.1% zein/30.8% hydroxypropylcellulose/23.1% propylene glycol and Biofilm B formed by higher zein content (53.8% zein/23.1% hydroxypropylcellulose/23.1% propylene glycol).…”

Section: Introductionmentioning

confidence: 99%

Zein/hydroxypropylcellulose biofilms with hydrophilic and hydrophobic montmorillonite clays

et al. 2023

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This study analyzed the changes in the structural, morphological and mechanical properties of Biofilm A (46.1% zein/30.8% hydroxypropylcellulose/23.1% propylene glycol) and Biofilm B (53.8% zein/23.1% hydroxypropylcellulose/23.1% propylene glycol) when 0.5%, 1% or 2% Cloisite Na+ (NaMt) and 1% Cloisite 30B (C30B) were added to the systems. Infrared spectroscopy showed clay particles interact with the polymeric matrix mainly via hydrogen bonds between silanol and amide/hydroxyl groups from minerals and polymers, respectively. X‐ray diffraction and small angle X‐ray scattering patterns indicated clays were exfoliated in both formulations with 0.5% NaMT and 1% C30B, or presented larger lamellar spacing on biofilms containing 1% or 2% of hydrophilic clay compared to pure clays. Scanning electron micrographs showed clay were incorporated into the polymers at low clay content and presented some aggregates at 2% NaMt. Mechanical tests showed that Biofilms B had better mechanical properties compared to Biofilms A, and Biofilms B with 1% NaMt presented the highest value of tensile strength. Moreover, the addition of organophilic clay in both formulations produced nanocomposites with good mechanical properties. These results showed clays are strategic to obtain nanocomposite films with interesting physical and chemical properties.

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Hydroxypropyl cellulose functionalized magnetite graphene oxide nanobiocomposite for chemo/photothermal therapy

Işıklan

Hussien

Türk

2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Anisotropic nanocomposite films of hydroxypropylcellulose and graphene oxide with multi-responsiveness

Abstract: Nanocomposite films fabricated by blade-coating possess anisotropic mechanical properties and multi-responsiveness to external stimuli, affording potential applications as sensors and actuators.

Cited by 4 publications

References 39 publications

Fabrication of Moisture-Responsive Crystalline Smart Materials for Water Harvesting and Electricity Transduction

Fabrication of Moisture-Responsive Crystalline Smart Materials for Water Harvesting and Electricity Transduction

Zein/hydroxypropylcellulose biofilms with hydrophilic and hydrophobic montmorillonite clays

Hydroxypropyl cellulose functionalized magnetite graphene oxide nanobiocomposite for chemo/photothermal therapy

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