Gradient adhesion modification of polyacrylamide/alginate–calcium tough hydrogels

Ding, Ning; Zhang, Yiwei; Dai, Yu; Xia, Fan; Zhang, Xiaojin

doi:10.1039/d1tb02599f

Cited by 35 publications

(14 citation statements)

References 41 publications

(42 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To test the sensitivity of the CS4 as a strain sensor, the real‐time relative current change of the CS4 under different strains was studied. The signal of the ionic gel strain sensor came from the change of ion migration distance and ion concentration per unit volume during the deformation process, so that the current of the ionic gel in the constant voltage circuit changed 45 . With the strain increasing from 0% to 300%, the relative current of the CS4 decreased in a stepped manner (Figure 6b).…”

Section: Resultsmentioning

confidence: 99%

“…The signal of the ionic gel strain sensor came from the change of ion migration distance and ion concentration per unit volume during the deformation process, so that the current of the ionic gel in the constant voltage circuit changed. 45 With the strain increasing from 0% to 300%, the relative current of the CS4 decreased in a stepped manner (Figure 6b). The gauge factor (GF) of the strain sensor was one of the important indexes to measure the sensitivity of the strain sensor.…”

Section: Application As Strain Sensormentioning

confidence: 95%

See 1 more Smart Citation

A stretchable, compressible and anti‐freezing ionic gel based on a natural deep eutectic solvent applied as a strain sensor

Yan

Lian

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Glycerin (Gly), a common by-product in petrochemical industry, is used as hydrogen bond donor. Green organic choline chloride (ChCl) as hydrogen bond acceptor. Natural deep eutectic solvent (NDES) can be prepared with Gly and ChCl. Subsequently, a starch/NDES ionic gel is prepared by in situ free radical polymerization of acrylamide monomer in NDES with starch as the reinforcement. The effects of amylose content in starch and starch addition amount on mechanical properties of ionic gel are analyzed. The results show that starch could be partially dissolved and dispersed in NDES. Compared with the tensile strength of pure NDES gel (about 15 kPa), the tensile strength of starch/NDES ionic gel is increased by 6 times to 90 kPa. It shows good selfrecovery performance after 20 compression cycles. Starch/NDES ionic gel has good thermal stability and frost resistance. In addition, CS4 starch/NDES ionic gel has the highest conductivity. At the same time, starch/NDES ionic gel has been successfully applied to monitor grasping motion of hand, which has the potential of strain sensor. It provides a new green method for the design of electronic products such as electronic skin.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Application As Strain Sensormentioning

confidence: 95%

A stretchable, compressible and anti‐freezing ionic gel based on a natural deep eutectic solvent applied as a strain sensor

Yan

Lian

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Then the absorption spectra of TMB at 652 nm were recorded. The relationship between the color reaction of TMB and concentration of FePDA−PAM hydrogel (100, 200, 300, 400, and 440 μg/mL), H 2 O 2 (0.25, 0.5, 0.75, and 1.0 mM) and the reaction time (0, 5,15,20,25,30,35,40,45,50,55, and 60 min) was also explored. Furthermore, the same experiments were also carried out in FePDA solution, where the volume of FePDA and H 2 O 2 was 200 μL.…”

Section: Photothermal Effect Ofmentioning

confidence: 99%

“…Among various hydrogel materials, polyacrylamide and its derivatives are one of the most common dressing systems. They are nontoxic, biologically inert, can maintain their shape, and can be easily integrated with some organic substances or metal ions for modification. − However, polyacrylamide hydrogels have low stretchability, poor toughness, limited tissue adhesion, and poor antibacterial activity, which limit their application as wound dressings . Therefore, it is necessary to introduce other functional materials to adjust the mechanical, chemical, and biophysical properties of polyacrylamide hydrogel dressings.…”

Section: Introductionmentioning

confidence: 99%

Rapid In Situ Deposition of Iron-Chelated Polydopamine Coating on the Polyacrylamide Hydrogel Dressings for Combined Photothermal and Chemodynamic Therapy of Skin Wound Infection

Yang

Wang

et al. 2022

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

Pathogenic bacterial infections of skin wounds have caused a significant threat to clinical treatment and human life safety. Here, we develop a bactericidal hydrogel dressing consisting of a polyacrylamide (PAM) hydrogel framework with in situ surfacedeposition of iron-dopped polydopamine (FePDA). The prepared hydrogel dressing (FePDA−PAM) has a compact surface, good tensile strength, and excellent elastic recovery ability. The introduction of Fe 3+ ions improve the photothermal therapy (PTT) efficiency of the PDA and endow the hydrogel dressing with chemodynamic therapy (CDT) properties. In vitro experiments show that the antibacterial effect of FePDA−PAM hydrogel on Staphylococcus aureus reach nearly 100% under the combined action of H 2 O 2 and 808 nm near-infrared (NIR) laser, indicating an excellent combined antibacterial property of PTT and CDT. Furthermore, the FePDA−PAM + H 2 O 2 + NIR treatment group in the in vivo antibacterial experiments displays lowest relative wound area and optimal wound healing within 5 days of treatment, thereby indicating the intensive skin wound disinfection. To summarize, the FePDA−PAM hydrogel has simple preparation and good biosafety. It may serve as a potential wound dressing for the combined PTT/CDT dual-mode antibacterial therapy.

show abstract

“…These methods often rely on hydrogel-specific physicochemical properties and are limited to the universality of hydrogel adhesion. External stimuli (e.g., pH, temperature, light, redox, electric field, ultrasound) or structure establishments − are required to induce hydrogel adhesion, and the operation process is complicated.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Molecular Lock: A Universal Strategy for Hydrogel Adhesion

Ding

Dai

Xia

et al. 2022

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

Hydrogel adhesion is fundamental to a large number of established and emerging fields. The existing adhesion methods have some problems, such as the limited penetration ability of polymers in hydrogels, the interface hardening caused by in situ monomer polymerization, the secondary damage caused by covalent strong bonding during detachment, the need for complementary techniques to induce adhesion, and the complex and impractical operation. Inspired by the adhesion mechanism of mussels, we propose a universal strategy of interfacial molecular lock (IML) for hydrogel adhesion, which is simple to operate. IML is composed of organic (low-molecular-weight) molecules containing catechol groups, which are easy to penetrate into hydrogels. The principle of IML relies on the combination of a dynamic covalent bond, coordination bond, hydrogen bond, π−π interaction, and cation-π interaction. IML can adapt to interfacial chemistry of hydrogels on different substrates and achieve reversible adhesion without external regulation. The molecular micro-polymerization further enhances the stability and strength of hydrogel adhesion. IML is expected to expand hydrogel adhesion in various applications, especially tissue adhesives, wound sealants, wearable devices, and hydrogel-on-metal protection.

show abstract

Gradient adhesion modification of polyacrylamide/alginate–calcium tough hydrogels

Abstract: Strong hydrogel adhesion requires the synergy of adhesion and cohesion. Gradient adhesive-tough hydrogels can balance adhesion and cohesion, however, their construction is still a challenging task. Here, we used ethylenediaminetetraacetic...

Cited by 35 publications

References 41 publications

A stretchable, compressible and anti‐freezing ionic gel based on a natural deep eutectic solvent applied as a strain sensor

A stretchable, compressible and anti‐freezing ionic gel based on a natural deep eutectic solvent applied as a strain sensor

Rapid In Situ Deposition of Iron-Chelated Polydopamine Coating on the Polyacrylamide Hydrogel Dressings for Combined Photothermal and Chemodynamic Therapy of Skin Wound Infection

Interfacial Molecular Lock: A Universal Strategy for Hydrogel Adhesion

Contact Info

Product

Resources

About