A gradient Laponite-crosslinked nanocomposite hydrogel with anisotropic stress and thermo-response

Tan, Yun; Xu, Shimei; Wu, Ronglan; Du, Juan; Sang, Ji‐Long; Wang, Jide

doi:10.1016/j.clay.2017.08.004

Cited by 27 publications

(19 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The same technique was successfully used by the same group also for the creation of laponite-containing poly(N-isopropylacrylamide)-based [8] or laponite-containing hydrogel formed by copolymers of the thermo-responsive monomers N,N-diethylacrylamide and (2-dimethylamino) ethyl methacrylate [9].…”

Section: Electro-basedmentioning

confidence: 98%

“…Subsequently, during electrophoresis in calcium chloride and disodium hydrogen phosphate solution, hydroxyapatite particles were formed within the channels and distributed uniformly. By controlling the duration of the electrophoresis procedure, a The same technique was successfully used by the same group also for the creation of laponite-containing poly(N-isopropylacrylamide)-based [8] or laponite-containing hydrogel formed by copolymers of the thermo-responsive monomers N,N-diethylacrylamide and (2-dimethylamino) ethyl methacrylate [9].…”

Section: Electro-basedmentioning

confidence: 99%

See 1 more Smart Citation

Gradient Hydrogels—The State of the Art in Preparation Methods

2020

View full text Add to dashboard Cite

Gradient hydrogels refer to hydrogel materials with a gradual or abrupt change in one or some of their properties. They represent examples of more sophisticated gel materials in comparison to simple, native gel networks. Here, we review techniques used to prepare gradient hydrogels which have been reported in literature over the last few years. A variety of simple preparation methods are available, most of which can be relatively easily utilized in standard laboratories

show abstract

Section: Electro-basedmentioning

confidence: 98%

Section: Electro-basedmentioning

confidence: 99%

Gradient Hydrogels—The State of the Art in Preparation Methods

2020

View full text Add to dashboard Cite

show abstract

“…In addition, a new type of NC gel with gradient structure that exhibits anisotropic mechanical properties has recently been produced. When external fields are applied during the gelation process, such as direct current (DC) electric fields, magnetic fields, and stress, NPs tend to form an orderly dispersion in the NC gels, revealing anisotropic mechanical properties due to the anisotropic microstructure of the hydrogels. We will discuss the NC gel with anisotropic structure in Sections 3.2.4, 3.2.5, and 4.…”

Section: Properties Of Nanocomposite Hydrogelsmentioning

confidence: 99%

“…In addition, electrical stimuli could induce the formation of gradient and orderly structures in NC gels. For example, a gradient structure of PNIPAAm/clay NC gels could be prepared by applying an external DC electric field during polymerization . The negative charge on the surface of the laponite tends to move toward the anode in the electric field, which induces gradient structure and anisotropic properties along the direction of the electric field ( Figure ) .…”

Section: Properties Of Nanocomposite Hydrogelsmentioning

confidence: 99%

Nanoparticle–Polymer Synergies in Nanocomposite Hydrogels: From Design to Application

Chen

Hou

Ren

et al. 2018

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Hydrogels are an important class of soft materials with high water retention that exhibit intelligent and elastic properties and have promising applications in the fields of biomaterials, soft machines, and artificial tissue. However, the low mechanical strength and limited functions of traditional chemically cross-linked hydrogels restrict their further applications. Natural materials that consist of stiff and soft components exhibit high mechanical strength and functionality. Among artificial soft materials, nanocomposite hydrogels are analogous to these natural materials because of the synergistic effects of nanoparticle (NP) polymers in hydrogels construction. In this article, the structural design and properties of nanocomposite hydrogels are summarized. Furthermore, along with the development of nanocomposite hydrogel-based devices, the shaping and potential applications of hydrogel devices in recent years are highlighted. The influence of the interactions between NPs and polymers on the dispersion as well as the structural stability of nanocomposite hydrogels is discussed, and the novel stimuli-responsive properties induced by the synergies between functional NPs and polymeric networks are reviewed. Finally, recent progress in the preparation and applications of nanocomposite hydrogels is highlighted. Interest in this field is growing, and the future and prospects of nanocomposite hydrogels are also reviewed.

show abstract

“…Taking advantage of colloidal property and crosslinking effect of Laponite, in our previous work, we successfully prepared a NC hydrogel with gradient distribution of Laponite using an electrophoretic method. The hydrogel showed gradient mechanical stress or gradient transparency …”

Section: Introductionmentioning

confidence: 99%

A Fast, Reversible, and Robust Gradient Nanocomposite Hydrogel Actuator with Water‐Promoted Thermal Response

Tan

Wang

et al. 2018

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

Poly(N-isopropylacrylamide)/Laponite (PNIPAM/Laponite) gradient nanocomposite hydrogel actuators are developed as temperature-controlled actuators with excellent performance using a facile electrophoresis method. The actuators exhibit a rapid (20 s response time) and reversible response, as well as large deformation (bending angle of 231°), which is due to the graded forces generated by the thermo-induced anisotropic shrinkage and extension of the gradient hydrogels. A good linear relationship is observed between the maximum bending angles and the corresponding temperatures for the actuators with fixed sizes. Moreover, the gradient hydrogel with high water content achieved larger actuation angles and shorter response time than the one with low water content, showing an interesting water-promoted effect. Meanwhile, different types of actuators are designed to suit for more specific scenarios, and may be used for various applications, such as biosensing, artificial organization, and transportation of targeted objects.

show abstract

A gradient Laponite-crosslinked nanocomposite hydrogel with anisotropic stress and thermo-response

Cited by 27 publications

References 33 publications

Gradient Hydrogels—The State of the Art in Preparation Methods

Gradient Hydrogels—The State of the Art in Preparation Methods

Nanoparticle–Polymer Synergies in Nanocomposite Hydrogels: From Design to Application

A Fast, Reversible, and Robust Gradient Nanocomposite Hydrogel Actuator with Water‐Promoted Thermal Response

Contact Info

Product

Resources

About