Construction of ordered structure in polysaccharide hydrogel: A review

Nie, Jingyi; Pei, Boying; Wang, Zhengke; Hu, Qiaoling

doi:10.1016/j.carbpol.2018.10.033

Cited by 138 publications

(68 citation statements)

References 69 publications

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“…Radially multilayered hydrogel with core–shell onion‐like structure can be also obtained in two opposite ways, outward and inward . The outward way refers to omnidirectional growth of the layers on a core .…”

Section: Anisotropic Hydrogelsmentioning

confidence: 99%

Hydrogel‐Based Artificial Muscles: Overview and Recent Progress

Park

Kim

2020

Advanced Intelligent Systems

113

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Artificial muscles are promising as an intelligent material that can replace conventional power systems to reproduce the motion of a living organism. Among various building materials, hydrogels have great advantages as artificial muscles, such as responsiveness to a wide range of stimuli, large volume deformation, and sensitivity. However, conventional hydrogel actuators that generate only isotropic volume change in response to an external stimulus cannot be considered as artificial muscles because complex deformations are not possible. Instead, programmed complex deformations originated from a rationally designed anisotropic structure are desired in artificial muscles. Herein, recent approaches for constructing stimuli‐responsive hydrogels with an anisotropic structure, thereby enabling a directional complex motion to mimic a muscle are reviewed. First, stimuli‐responsive shape‐deforming hydrogels as a main building matrix are categorized according to stimulating external signals. The representative methods for modulating the isotropic structure of a hydrogel into various anisotropic structures, such as multilayer structure, linearly oriented structure, and patterned structure are discussed. Finally, the recent strategies to achieve muscle‐like motion of hydrogels by combining stimuli responsiveness and anisotropic structures for translation from elementary contraction and expansion to programmed deformations, such as multidirectional bending, directionally amplified deformation, and compositive programmed motion, are covered.

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Section: Anisotropic Hydrogelsmentioning

confidence: 99%

Hydrogel‐Based Artificial Muscles: Overview and Recent Progress

Park

Kim

2020

Advanced Intelligent Systems

113

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“…Hydrogels can absorb a large amount of water molecules but not be dissolved in water, because they possess hydrophilic segments in their 3D crosslinked network [1,2]. On account of their admirable swelling property and eco-friendliness, hydrogels are applied in many fields such as medicine [3,4], agriculture [5,6] and cosmetics [7], etc.…”

Section: Introductionmentioning

confidence: 99%

A Robust, Tough and Multifunctional Polyurethane/Tannic Acid Hydrogel Fabricated by Physical-Chemical Dual Crosslinking

et al. 2020

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Commonly synthetic polyethylene glycol polyurethane (PEG–PU) hydrogels possess poor mechanical properties, such as robustness and toughness, which limits their load-bearing application. Hence, it remains a challenge to prepare PEG–PU hydrogels with excellent mechanical properties. Herein, a novel double-crosslinked (DC) PEG–PU hydrogel was fabricated by combining chemical with physical crosslinking, where trimethylolpropane (TMP) was used as the first chemical crosslinker and polyphenol compound tannic acid (TA) was introduced into the single crosslinked PU network by simple immersion process. The second physical crosslinking was formed by numerous hydrogen bonds between urethane groups of PU and phenol hydroxyl groups in TA, which can endow PEG–PU hydrogel with good mechanical properties, self-recovery and a self-healing capability. The research results indicated that as little as a 30 mg·mL−1 TA solution enhanced the tensile strength and fracture energy of PEG–PU hydrogel from 0.27 to 2.2 MPa, 2.0 to 9.6 KJ·m−2, respectively. Moreover, the DC PEG–PU hydrogel possessed good adhesiveness to diverse substrates because of TA abundant catechol groups. This work shows a simple and versatile method to prepare a multifunctional DC single network PEG–PU hydrogel with excellent mechanical properties, and is expected to facilitate developments in the biomedical field.

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“…Curcumin loading was carried out by dispersing 100 mg of the dried cellulose/TiO 2 /β-CD Scheme 1: Schematic illustration of the curcumin-carrying composite hydrogel and the proposed mechanism for the cross-linking reaction of ECH with β-CD and cellulose. 3 Journal of Nanomaterials hydrogel in a mixture of 1 mg/mL curcumin aqueous solution and 50 mL phosphate buffer solution (PBS, pH = 7 4) and then stirring for 24 h to reach the equilibrium state at 37°C. The mixed solution was centrifuged, and the supernatant was collected and subjected to UV-vis analysis at λ max = 440 nm [18].…”

Section: Drug Loading and In Vitro Releasementioning

confidence: 99%

“…Hydrogels are three-dimensional, cross-linked polymeric networks which possess an ability to swell in water without getting dissolved in it [3]. With the advantages of renewability, biocompatibility, biodegradability, and thermal and chemical stabilities, cellulose-based hydrogels can be used for wound healing [4], tissue engineering [5], and drug carrying [6].…”

Section: Introductionmentioning

confidence: 99%

Study on Photocatalytic Antibacterial and Sustained-Release Properties of Cellulose/TiO₂/β-CD Composite Hydrogel

Zhang

Zhu

et al. 2019

Journal of Nanomaterials

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A novel cellulose/TiO2/β-CD hydrogel with high photocatalytic antibacterial activity and sustained release of drug was prepared. TiO2 sol with a diameter of about 9 nm in this hydrogel was the photoantibacterial agent. β-CD can significantly enhance photoantibacterial activity and the sustained-release effect of this hydrogel. The structure and property of this hydrogel composite were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Escherichia coli and Staphylococcus aureus were selected as model bacteria to evaluate the antibacterial activity of the composite hydrogel under natural light irradiation and darkness, respectively. The in vitro release experiment used curcumin as a model drug in PBS buffer solution. The influence of β-CD on the antibacterial activity and sustained-release effect of the composite hydrogel was investigated. The results showed that the hydrogel composite presented a good photoantibacterial property, while the antibacterial activity can be neglected under the condition of no light. The complete release of curcumin from the composite was achieved after 120 h. Therefore, the hydrogel system has the characteristics of low cost and high effect, which could be used for an antibacterial sustained-release material.

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Construction of ordered structure in polysaccharide hydrogel: A review

Cited by 138 publications

References 69 publications

Hydrogel‐Based Artificial Muscles: Overview and Recent Progress

Hydrogel‐Based Artificial Muscles: Overview and Recent Progress

A Robust, Tough and Multifunctional Polyurethane/Tannic Acid Hydrogel Fabricated by Physical-Chemical Dual Crosslinking

Study on Photocatalytic Antibacterial and Sustained-Release Properties of Cellulose/TiO₂/β-CD Composite Hydrogel

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Construction of ordered structure in polysaccharide hydrogel: A review

Cited by 138 publications

References 69 publications

Hydrogel‐Based Artificial Muscles: Overview and Recent Progress

Hydrogel‐Based Artificial Muscles: Overview and Recent Progress

A Robust, Tough and Multifunctional Polyurethane/Tannic Acid Hydrogel Fabricated by Physical-Chemical Dual Crosslinking

Study on Photocatalytic Antibacterial and Sustained-Release Properties of Cellulose/TiO2/β-CD Composite Hydrogel

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Study on Photocatalytic Antibacterial and Sustained-Release Properties of Cellulose/TiO₂/β-CD Composite Hydrogel