Mechanochromic double network hydrogels as a compression stress sensor

Wu, Che-Hao; Tu, Cheng-Wei; Aimi, Junko; Zhang, Jiawei; Chen, Tao; Wang, Chung-Chi; Huang, Chih‐Feng

doi:10.1039/d0py01075h

Cited by 33 publications

(18 citation statements)

References 27 publications

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“…(3) New applications can be developed by using polymer cross‐linked networks. Double network hydrogels have been prepared from various contents of spirolactam rhodamine 6G, which not only renders crosslinking points but also provides significant mechano‐sensing features 20 . Poly(N‐isopropylacrylamide) (PNIPAM) is a frequently‐used polymer for thermometers and chemosensors due to its specific water‐solubility, which can be controlled by temperature 21–23 .…”

Section: Introductionmentioning

confidence: 99%

Ratiometric fluorescent chemosensor based on the block copolymer of poly(N‐isopropylacrylamide)‐b‐poly(N‐vinylcarbazole) containing rhodamine 6G and 1,8‐naphthalimide moieties

Kong

Jia

Zhang

et al. 2021

J of Applied Polymer Sci

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We have synthesized an amphiphilic block copolymer poly(N‐isopropylacrylamide)‐b‐poly(N‐vinylcarbazole) containing 1,8‐naphthalimide and spirolactam rhodamine 6G moieties via reversible addition‐fragmentation chain transfer radical polymerization. The photoluminescence (PL) spectrum of the poly(N‐vinylcarbazole) block well matches the absorption spectrum of the 1,8‐naphthalimide moiety and the enhanced emission with a peak at 510 nm from the 1,8‐naphthalimide moiety is found in the block copolymer film for excitation at 330 nm. The 560‐nm emission from the rhodamine 6G moiety is observed as the block copolymer film sprayed by Britton‐Robinson (B‐R) buffers or Fe3+ aqueous solutions for excitation at 330 and 400 nm. The PL intensity at 560 nm is markedly increased for the pH value of the B‐R buffer lower than 3.0 or the Fe3+ concentration in water higher than 5 × 10−4 M. The 560‐nm PL intensity is much higher for the block copolymer film photoexcited at 330 nm than that photoexcited at 400 nm due to double‐step resonance energy transfer. The PL intensity ratio of 560 to 510 nm (I560/I510) is dependent on the resonance energy transfer from 1,8‐naphthalimide to rhodamine 6G, which is sensitive to the concentrations of H+ and Fe3+ ions in water.

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Section: Introductionmentioning

confidence: 99%

Ratiometric fluorescent chemosensor based on the block copolymer of poly(N‐isopropylacrylamide)‐b‐poly(N‐vinylcarbazole) containing rhodamine 6G and 1,8‐naphthalimide moieties

Kong

Jia

Zhang

et al. 2021

J of Applied Polymer Sci

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“…Some mechanophores display a distinct optical (mechanochromic) response upon covalent bond scission, such as a colour change or a change of the photoluminescence properties. 5,8,10 Examples of such mechanophores that have been widely used for stress sensing in polymers include spiropyrans, [11][12][13] 1,2-dioxetans, [14][15][16][17] diarylbibenzofuranones, [18][19][20] rhodamines, [21][22][23] naphthopyrans, [24][25][26][27] and oxazines. 28 Since the operating principle of these motifs includes the rupture of a covalent bond, their capability of sensing stresses in the low strain regime of polymer deformation is generally limited.…”

Section: Introductionmentioning

confidence: 99%

Strain-correlated mechanochromism in different polyurethanes featuring a supramolecular mechanophore

et al. 2022

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“…In the recent reports, Many efforts have been made to improve the adhesive and mechanical properties of hydrogels. Double network (DN) hydrogels have been fabricated [22][23][24][25]. The DN hydrogels were composed of a highly cross-linked network that endowed stiffness to the hydrogel, and a second loosely cross-linked one that endowed toughness to it [26].…”

Section: Introductionmentioning

confidence: 99%

Highly stretchable, compressible, adhesive hydrogels with double network

Guo

Zeng

et al. 2021

J Polym Res

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In this work, a double network bovine serum albumin-polyacrylamide (BSA-PAM) adhesive hydrogel was fabricated, in which combination of physical interactions including hydrogen bonds and chain entanglements, and chemical covalent photo-crosslinking. The BSA-PAM hydrogel exhibited excellent mechanical and adhesive properties. The composite hydrogel not only demonstrated excellent tensile properties (maximum force elongation 1552%~2037%), but also displayed extremely high fatigue resistance even when subjected to compress strains of up to 85%. More importantly, the BSA-PAM hydrogel showed excellent adhesiveness to various substrates (90 kPa~150 kPa for glass and 9.74 kPa~35.09 kPa for pigskin). This work provided a facile way of fabricating tough, stretchable and adhesive BSA-PAM hydrogels.

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Mechanochromic double network hydrogels as a compression stress sensor

Abstract: In this study, a series of double network (DN) hydrogels with rhodamine (Rh) chromophore were prepared via two-step thermal/redox free radical polymerisations. We synthesized triacrylic ester modified Rh (Rh–TA) and...

Cited by 33 publications

References 27 publications

Ratiometric fluorescent chemosensor based on the block copolymer of poly(N‐isopropylacrylamide)‐b‐poly(N‐vinylcarbazole) containing rhodamine 6G and 1,8‐naphthalimide moieties

Ratiometric fluorescent chemosensor based on the block copolymer of poly(N‐isopropylacrylamide)‐b‐poly(N‐vinylcarbazole) containing rhodamine 6G and 1,8‐naphthalimide moieties

Strain-correlated mechanochromism in different polyurethanes featuring a supramolecular mechanophore

Highly stretchable, compressible, adhesive hydrogels with double network

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