Magnetically activated adhesives: towards on-demand magnetic triggering of selected polymerisation reactions

Davies, G. R.; Govan, Joseph; Tekoriute, Renata; Serrano-García, Raquel; Nolan, Hugo; Farrell, David J.; Hajatpour, Ory; Gun’ko, Yurii K.

doi:10.1039/c7sc03474a

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…According to their study, the physical conjugation of thrombin with these nanoparticles substantially improves its storage stability and shortens the effective blood-clotting time [150]. Magnetically activated systems can also play an indirect role in hemostasis, as shown by Davies et al [151]. They have developed a colloidal system of methacrylate ester monomers, peroxide, and copper salts with magnetic nanoparticles that act as inhibitors.…”

Section: Other Synthetic Hemostatic Polymersmentioning

confidence: 99%

“…In the presence of an external magnetic field, these nanoparticles can be removed from the system, thereby triggering the copper-mediated polymerization reaction. This opens up new avenues for magnetically triggered reaction initiations at wound sites, and may be applied to hemostatic systems as well [151]. Luo et al, have developed an electric field-modified electrospinning technique that enables the precise deposition of nanofibers at wound sites [152].…”

Section: Other Synthetic Hemostatic Polymersmentioning

confidence: 99%

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Polymeric Materials for Hemostatic Wound Healing

et al. 2021

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Hemorrhage is one of the greatest threats to life on the battlefield, accounting for 50% of total deaths. Nearly 86% of combat deaths occur within the first 30 min after wounding. While external wound injuries can be treated mostly using visual inspection, abdominal or internal hemorrhages are more challenging to treat with regular hemostatic dressings because of deep wounds and points of injury that cannot be located properly. The need to treat trauma wounds from limbs, abdomen, liver, stomach, colon, spleen, arterial, venous, and/or parenchymal hemorrhage accompanied by severe bleeding requires an immediate solution that the first responders can apply to reduce rapid exsanguinations from external wounds, including in military operations. This necessitates the development of a unique, easy-to-use, FDA-approved hemostatic treatment that can deliver the agent in less than 30 s and stop bleeding within the first 1 to 2 min at the point of injury without application of manual pressure on the wounded area.

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Section: Other Synthetic Hemostatic Polymersmentioning

confidence: 99%

Section: Other Synthetic Hemostatic Polymersmentioning

confidence: 99%

Polymeric Materials for Hemostatic Wound Healing

et al. 2021

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“…Can these gels be made to adhere strongly by subjecting them to an external stimulus? Such triggered adhesion or ‘adhesion on command’ has been shown to be induced by pH, , light, or magnetic fields. , In these studies, exposure to the stimulus induces strong adhesion between the gels, and typically, this adhesion persists thereafter when the stimulus is removed. In some cases, the adhesion can be subsequently reversed, either by altering the same stimulus (e.g., exposure to a different pH , ) or by an entirely different stimulus .…”

Section: Introductionmentioning

confidence: 99%

Universal Way to “Glue” Capsules and Gels into 3D Structures by Electroadhesion

Borden

Gargava

Kokilepersaud

et al. 2023

ACS Appl. Mater. Interfaces

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We demonstrate the use of electroadhesion (EA), i.e., adhesion induced by an electric field, to connect a variety of soft materials into 3D structures. EA requires a cationic and an anionic material, but these can be of diverse origin, including covalently cross-linked hydrogels made by polymerizing charged monomers or physical gels/capsules formed by the ionic cross-linking of biopolymers (e.g., alginate and chitosan). Between each cationic/anionic pair, EA is induced rapidly (in ∼10 s) by low voltages (∼10 V DC)and the adhesion is permanent after the field is turned off. The adhesion is strong enough to allow millimeter-scale capsules/gels to be assembled in 3D into robust structures such as capsule–capsule chains, capsule arrays on a base gel, and a 3D cube of capsules. EA-based assembly of spherical building blocks can be done more precisely, rapidly, and easily than by any alternative techniques. Moreover, the adhesion can be reversed (by switching the polarity of the field)hence any errors during assembly can be undone and fixed. EA can also be used for selective sorting of charged soft matterfor example, a ‘finger robot’ can selectively ‘pick up’ capsules of the opposite charge by EA and subsequently ‘drop off’ these structures by reversing the polarity. Overall, our work shows how electric fields can be used to connect soft matter without the need for an adhesive or glue.

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“…In addition, stimuli-responsive "on-demand-peeling" adhesives are desired in order to dismantle products rapidly and neatly after stimuli. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Various stimuli of "on-demand-peeling" adhesives have been reported. The examples were UV or visible light, [5][6][7][8][9][10][11][12][13] heat, [14][15][16][17][18] electricity, 19,20 magnetic force, 21 and so on.…”

Section: Manuscript Introductionmentioning

confidence: 99%

On-demand easy peeling of acrylic adhesives containing ionic liquids through a microwave irradiation stimulus

Usuba

Hongo

Matsumoto

et al. 2018

Polym J

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We prepared microwave-responsive "on-demand-peeling" adhesives by only mixing secondgeneration acrylic adhesives with ionic liquids. Rapid responsibility (<30 s for adhesives failure) toward microwave irradiation was achieved using microwave oven. This "on-demand-peeling" was attributed to local heating of the ionic liquid in the adhesive by microwave irradiation. In addition, the adhesive strength was not influenced by ionic liquid additives without microwave irradiation. We revealed that the local heating and the plasticizing effect of ionic liquid resulted in the "on-demand-peeling". Our preparation method of the microwave-responsive adhesives were simple, conventional and attractive in the fundamental and industrial fields.

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Magnetically activated adhesives: towards on-demand magnetic triggering of selected polymerisation reactions

Abstract: We demonstrate a new strategy to inhibit and trigger polymerisation of an adhesive formulation, utilising colloidal core@shell CoFe2O4@MnO2 magnetic nanoparticles.

Cited by 8 publications

References 31 publications

Polymeric Materials for Hemostatic Wound Healing

Polymeric Materials for Hemostatic Wound Healing

Universal Way to “Glue” Capsules and Gels into 3D Structures by Electroadhesion

On-demand easy peeling of acrylic adhesives containing ionic liquids through a microwave irradiation stimulus

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