Thermo-Responsive and Shape-Adaptive Hydrogel Actuators from Fundamentals to Applications

Zhang, Yanxian; Xie, Songhai; Zhang, Dong; Ren, Baiping; Liu, Yonglan; Tang, Li; Chen, Qiang; Yang, Jun; Wu, Junfeng; Tang, Jianxin; Zheng, Jie

doi:10.30919/es8d788

Cited by 20 publications

(26 citation statements)

References 19 publications

(23 reference statements)

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“…Besides, this strategy can also make the carbon aerogels as smart materials in different fields, such as electromagnetic attenuation materials, dielectric capacitor materials, plasmonic materials, and waveguide materials. [ 20–28 ] When it comes to the application of negative permittivity, different kinds of negative permittivity are preferred. When negative permittivity is used in capacitor (20 Hz–100 kHz), the negative permittivity value should be small enough to match with positive permittivity of dielectric layers, and thus the effective permittivity of capacitor could be obviously enhanced.…”

Section: Resultsmentioning

confidence: 99%

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Xie

Sun

et al. 2021

Adv Elect Materials

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Aerogels with negative parameters have become a research hotspot since the discovery of negative Poisson's ratio and negative thermal expansion coefficient in aerogels. The negative parameters are originally brought up and studied in electromagnetic metamaterials, leaving a question that whether aerogels can be used to construct metamaterials with negative electromagnetic parameters. Here, the authors show that negative permittivity (epsilon‐negative) property can be achieved in carbon aerogels, and its value is adjusted continuously by changing the composition of carbon aerogels but keeping their microstructure unchanged. This is a novel strategy different from the typical array‐structure‐containing metamaterials. Moreover, a physical state transition is found when increasing the carbonization temperature, where the initial low‐loss dielectric state evolves into a high‐loss one upon increasing the temperature from 400 to 700 °C followed by a final degenerate semiconductor state when increasing the temperature to 800 °C and above. This work can provide a new method toward the design of electromagnetic metamaterials, starting by choosing the component materials with optimal composition.

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Section: Resultsmentioning

confidence: 99%

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Xie

Sun

et al. 2021

Adv Elect Materials

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“…Hydrogels can also be very usefulmaterialsin many other fields apart from the abovementionedapplications. [82][83][84][85][86][87][88] On the other hand, xerogels (dried gels) can be used in various fields, such as energy-storage devices, metacomposites, electromagnetic wave absorbing/shielding devices, and others. [89][90][91][92] Xerogels having π-surfaces can perform similar water remediation and hence these materials can be used as an attractive candidate for waste water management.…”

Section: Introductionmentioning

confidence: 99%

Peptide-Based Gel in Environmental Remediation: Removal of Toxic Organic Dyes and Hazardous Pb²⁺ and Cd²⁺ Ions from Wastewater and Oil Spill Recovery

et al. 2020

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“…NIPAAm has also shown promising results in the formulation of thermo-responsive, shape adaptive hydrogel actuators when hybridized with less-or non-responsive polymers, due to the differences in the thermo-responsive swelling and shrinking properties of the polymers (Zhang et al, 2019). Successful manipulation of both the lower critical solution temperature and shape adaptive behavior was achieved via copolymerization of NIPAAm with N-[3-(Dimethylamino)propyl]methacrylamide (DMAPMA) and acrylamide (AM) respectively.…”

Section: Poly (N-isopropylacrylamide) Based Thermogelsmentioning

confidence: 99%

Hybrid Thermo-Responsive Polymer Systems and Their Biomedical Applications

et al. 2020

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Targeted and controlled drug delivery employing "smart materials" is a widely investigated field, within which stimuli-responsive polymers, particularly those which are thermo-responsive, have received considerable attention. Thermo-responsive polymers have facilitated the formulation of in situ gel forming systems which undergo a sol-gel transition at physiological body temperature, and have revolutionized the fields of tissue engineering, cell encapsulation, and controlled, sustained delivery of both drugs and genes. However, the use of single thermo-responsive polymers in the creation of these systems has posed numerous problems in terms of physico-mechanical properties, such as poor mechanical strength, high critical gelation concentrations (CGC) resulting in increased production costs and solutions that are too viscous, toxicity, as well as gelation temperatures that are incompatible with physiological body temperatures. Hybridization of these thermo-responsive polymers with other polymers has therefore been employed, resulting in the creation of tailor-made drug delivery systems that have optimal gelation temperatures and concentrations, ideal viscosities and improved gel strengths. This article reviews various thermo-responsive polymers that have been employed in the formulation of thermo-gelling systems. Special attention has been given to the hybridization of each of these polymers, the resulting systems that have been created, and their biomedical applications.

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Thermo-Responsive and Shape-Adaptive Hydrogel Actuators from Fundamentals to Applications

Cited by 20 publications

References 19 publications

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Peptide-Based Gel in Environmental Remediation: Removal of Toxic Organic Dyes and Hazardous Pb²⁺ and Cd²⁺ Ions from Wastewater and Oil Spill Recovery

Hybrid Thermo-Responsive Polymer Systems and Their Biomedical Applications

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Thermo-Responsive and Shape-Adaptive Hydrogel Actuators from Fundamentals to Applications

Cited by 20 publications

References 19 publications

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Epsilon‐Negative Carbon Aerogels with State Transition from Dielectric to Degenerate Semiconductor

Peptide-Based Gel in Environmental Remediation: Removal of Toxic Organic Dyes and Hazardous Pb2+ and Cd2+ Ions from Wastewater and Oil Spill Recovery

Hybrid Thermo-Responsive Polymer Systems and Their Biomedical Applications

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Product

Resources

About

Peptide-Based Gel in Environmental Remediation: Removal of Toxic Organic Dyes and Hazardous Pb²⁺ and Cd²⁺ Ions from Wastewater and Oil Spill Recovery