Facile formation of agarose hydrogel and electromechanical responses as electro-responsive hydrogel materials in actuator applications

Rotjanasuworapong, Kornkanok; Thummarungsan, Natlita; Lerdwijitjarud, Wanchai; Sirivat, Anuvat

doi:10.1016/j.carbpol.2020.116709

Cited by 47 publications

(48 citation statements)

References 72 publications

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“…Biological organisms can change their shape when environmental conditions stimulate them. Inspired by this, soft actuators [ 1 , 2 ] have drawn the attention of domestic and foreign scholars. In recent years, compared to electric or hydraulic hard actuators, soft actuators have become popular due to their flexibility and adaptability.…”

Section: Introductionmentioning

confidence: 99%

Smart Hydrogel Bilayers Prepared by Irradiation

Huo

An²,

Chang

et al. 2021

Polymers

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Environment-responsive hydrogel actuators have attracted tremendous attention due to their intriguing properties. Gamma radiation has been considered as a green cross-linking process for hydrogel synthesis, as toxic cross-linking agents and initiators were not required. In this work, chitosan/agar/P(N-isopropyl acrylamide-co-acrylamide) (CS/agar/P(NIPAM-co-AM)) and CS/agar/Montmorillonite (MMT)/PNIPAM temperature-sensitive hydrogel bilayers were synthesized via gamma radiation at room temperature. The mechanical properties and temperature sensitivity of hydrogels under different agar content and irradiation doses were explored. The enhancement of the mechanical properties of the composite hydrogel can be attributed to the presence of agar and MMT. Due to the different temperature sensitivities provided by the two layers of hydrogel, they can move autonomously and act as a flexible gripper as the temperature changes. Thanks to the antibacterial properties of the hydrogel, their storage time and service life may be improved. The as prepared hydrogel bilayers have potential applications in control devices, soft robots, artificial muscles and other fields.

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Section: Introductionmentioning

confidence: 99%

Smart Hydrogel Bilayers Prepared by Irradiation

Huo

An²,

Chang

et al. 2021

Polymers

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“…Nowadays, various responsive materials have been used for drug delivery (Sponchioni et al., 2019), chiral separation (Ding et al., 2014), sensors (Lin et al., 2020; Nakamitsu et al., 2021), and actuators (Rotjanasuworapong et al., 2020), due to their remarkable properties such as reduced energy consumption, controllable mechanical properties, and high sensitivity (Lin et al., 2021; Zhao et al., 2019). Photoresponsive surface molecularly imprinted polymers (PSMIPs), synthesized by molecular imprinting technology, have been applied to the selective separation field because of their excellent reversible photoisomerization behavior and high selectivity (Peng et al., 2016; Wei et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

A comparative study of photoresponsive molecularly imprinted polymers with different shell thicknesses: Effects on 6‐O‐α‐maltosyl‐β‐cyclodextrin separation

Fan

Wang

et al. 2021

Journal of Food Science

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Photoresponsive surface molecularly imprinted polymers (PSMIPs) with controlled nanoshell thicknesses were synthesized using different amounts of precursor materials to determine the effects of polymer shell layer thickness on the separation and purification of 6-O-alpha-maltosyl-beta-cyclodextrin (Malβ-CD). The physicochemical properties and adsorption and desorption capacities of PSMIPs with different shell thicknesses were studied. Interestingly, the uniform thickness of the imprinted polymer shell layer could be adjusted from 10 to 60 nm by varying the amount of polymerization precursors, and the average mesopore diameter of PSMIPs was not significantly affected by shell thickness. However, the removal efficiency and selective capacity of PSMIPs on Malβ-CD were strongly correlated to their shell thickness. The adsorption behavior of PSMIPs on Mal-β-CD fitted well with the Langmuir adsorption model and pseudo-second-order kinetic model. Based on the obtained results, PSMIPs with a 30-nm imprinted layer were found to be an excellent adsorbent for Mal-β-CD separation, with an adsorption capacity of 18.12 mg/g. They can therefore be used for industrial chromatographic separations of Mal-β-CD in the future. Practical Application: This article clearly demonstrated that the shell thickness of core-shell molecularly imprinted materials affected the degree and rate of cyclodextrin separation. Determining the optimal thickness is of great significance for the material in the separation and purification of cyclodextrin.

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“…Chitosan and cellulose are not the only biopolymers used as electroactive materials. Recently Rotjanasuworapong et al [18], have reported the use of agarose for the production of an electro-responsive material. In their work, agarose (AG) was used to fabricate the AG hydrogels through a simple solvent casting method.…”

mentioning

confidence: 99%

“…Figure 10. Proposed the electrostrictive response mechanism of the AG hydrogel [18] It is mentioned that the highest dielectric constant was obtained from the sample with 2%v/v. This result can be explained due to the higher concentration of water molecules within the hydrogel.…”

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confidence: 99%

See 1 more Smart Citation

Biopolymers and its application as electroactive polymers

Antonio

Uspenskaya

Olekhnovich

2021

Vestn. Voronež. gos. univ. inž. tehnol.

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Smart materials are a group of materials that exhibit the ability to change their composition or structure, their electrical and/or mechanical properties, or even their functions in response to an external stimulus such as heat, light, electricity, pressure, etc. Some of the advantages of these materials are: lightweight, flexibility, low cost of production, high energy density, fast response and compact size. One of the promises in the area of smart materials can be found in “smart polymer”. Polymers have many attractive characteristics, such as: lightweight, inexpensiveness, fractures tolerant, and pliable. Furthermore, they can be configured into almost any conceivable shape and their properties can be tailored according to the required needs. The capability of electroactive polymers (EAPs) to respond to electrical stimuli with a mechanical response, is attracting the attention of the scientific community from a wide range of disciplines. Biopolymers in recent decades have been studied as potential electroactive materials. These groups of polymers are extracted from a natural source; thus, they are eco-friendly, additionally they stand as a cheaper solution for the development of smart materials.The present manuscript will explore some of its applications as EAPs.

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Facile formation of agarose hydrogel and electromechanical responses as electro-responsive hydrogel materials in actuator applications

Cited by 47 publications

References 72 publications

Smart Hydrogel Bilayers Prepared by Irradiation

Smart Hydrogel Bilayers Prepared by Irradiation

A comparative study of photoresponsive molecularly imprinted polymers with different shell thicknesses: Effects on 6‐O‐α‐maltosyl‐β‐cyclodextrin separation

Biopolymers and its application as electroactive polymers

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