Polyacrylamide/Alginate double-network tough hydrogels for intraoral ultrasound imaging

Yi, Jiaqiang; Nguyen, Khoa D.; Wang, Wenda; Yang, Wenshuai; Pan, Mingfei; Lou, Edmond; Major, Paul W.; Le, Lawrence H.; Zeng, Hongbo

doi:10.1016/j.jcis.2020.06.015

Cited by 43 publications

(30 citation statements)

References 70 publications

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“…Specifically, the maximum stress of pristine hydrogel P without fillers is 47 kPa at 760% strain, while those of composite hydrogels P‐LMGO1, P‐LMGO2, P‐LMGO3, and P‐LMGO4 are 143 kPa at 4067% strain, 160 kPa at 2183% strain, 303 kPa at 1240% strain, and 108 kPa at 695% strain, respectively. The mechanical performance of P‐LMGO3 not only exceeds LM‐composite hydrogels, such as LM‐PAM, [ 24 ] LM‐poly(ethylene glycol) diacrylate, [ 23 ] LM‐poly(vinyl alcohol), [ 42 ] but also LM elastomer, [ 22 ] hybrid GO hydrogel, [ 43,44 ] MXene hydrogel, [ 45,46 ] as well as metal ion crosslinking hydrogels [ 28,47,48 ] (Figure 2f). Corresponding Young's modulus increases with GO/LM ratio until GO/LM = 1/10 (P‐LMGO3), and the highest value is 80 kPa (P‐LMGO3), which is four times more than that of P (18 kPa), as shown in Figure S13 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Graphene Oxide Encapsulating Liquid Metal to Toughen Hydrogel

Zhuo

et al. 2021

Adv Funct Materials

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Stretchable and tough hydrogels are highly required for various flexible devices. Liquid metal (LM) emerges as an attractive applicant in preparing functional hydrogels due to its unique features. However, the high fluidity of LM and incompatibility between LM and polymer matrix make it hard to fabricate tough hydrogels. Herein, inspired by the function of ligaments in biological structure, graphene oxide (GO) nanosheets are introduced to encapsulate LM droplets. GO nanosheets form strong interaction with both LM and polymer matrix to create a stable shell that prevents LM droplet from fracture and exudation to polymer network. The flexible LM/GO core–shell microstructure avoids phase separation and produces a tough hydrogel with stress of high up to 303 kPa at 1240% elongation. It also shows notch insensitivity and strong adhesion to various surfaces. This study opens the possibility of using LM in stretchable and tough hydrogels.

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Section: Resultsmentioning

confidence: 99%

Graphene Oxide Encapsulating Liquid Metal to Toughen Hydrogel

Zhuo

et al. 2021

Adv Funct Materials

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“…As we explained in the introduction of this article, as regards the operation of this imaging technique, there must not be an interface with extremely different densities at the surface level (almost always air) to avoid image distortion or its lack of display. In this regard, research is already leading to colloids with excellent affinity with the tissues of the oral cavity for study with intra-oral ultrasound [49].…”

Section: Discussionmentioning

confidence: 99%

Ultrasound Imaging in Dentistry: A Literature Overview

et al. 2021

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(1) Background: the frequency with which diagnostic tests are prescribed with exposure to ionizing radiation, a cause of biological damage, has been studied, and with much more attention, patients are subjected to these diagnostic tests for diagnosis and follow-up. This review aimed, given the recent developments of this technology, to evaluate the possible use of ultrasound in different branches of dentistry. The possibility of applying ionizing-radiation-free diagnostic exams in dentistry, overcoming the limits of this application, has led scientific research in this area to obtain interesting results that bode well for the future. (2) Methods: a search for articles on the application of ultrasounds in dentistry was performed using the PubMed electronic database. (3) Results: only 32 studies were included, and these clearly stated that this examination is widely usable and in great progress. (4) Conclusions: regarding the modern application techniques of this diagnostic test, it is essential to consider technological evolution as an objective to reduce the damage and side effects of necessary diagnostic tests. The use of ultrasound in dentistry can represent a valid radiation-free alternative, in certain contexts, to the other most used exams.

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“…The stability and durability of the as‐prepared CNCs coating were investigated using an Anton Paar Nano Tribometer (NTR 3 ) with the ball‐on‐disk configuration under reciprocating motions. [ 42 ] In a typical friction test, A bearing titanium ball with a diameter of 2 mm was used as the counter‐facing ball. The frequency and the sliding amplitude were set at 0.1 Hz and 2 mm, respectively, with applied normal load ranging from 1 to 35 mN.…”

Section: Methodsmentioning

confidence: 99%

A Universal Strategy for Constructing Robust and Antifouling Cellulose Nanocrystal Coating

Yang

Pan

Zhang

et al. 2021

Adv Funct Materials

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Super‐hydrophilic cellulose nanocrystals (CNCs) hold great potential in fabricating antifouling surfaces based on their high‐water binding affinity. However, integrating CNCs as a robust surface coating on substrate still remains a challenge due to its limited surface adhesion property. Herein, inspired by marine bio‐adhesive strategy, a facile yet universal surface coating method is developed for tightly anchoring CNCs on various substrates with an intermediate adhesive layer composed of tannic acid (TA)/polyethylenimine (PEI)/vanadium(V). Introducing V3+ ions in the assembly process significantly reduces the roughness of the TA/PEI/V bio‐glue layer via coordination chemistry, thus achieving a CNCs coating with a highly‐dense structure and outstandingly low root‐mean‐square roughness (≈2 nm). The super‐hydrophilic CNCs coating exhibits universal and outstanding antifouling properties in inhibiting oil adhesion, protein adsorption or cell attachment, and maintaining its structural integrity and wettability over 100 friction cycles. Additionally, the CNCs‐coated polyvinylidene fluoride (PVDF) membrane shows an ultra‐high water flux over 6000 L m–2 h–1 bar–1 and achieves nearly 100% permeating flux recovery ratio for separation of toluene‐in‐water emulsion containing various foulants. This study demonstrates a universal coating method to settle the long‐standing challenge of robust integration of rigid materials to various substrates for broad engineering and environmental applications.

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Polyacrylamide/Alginate double-network tough hydrogels for intraoral ultrasound imaging

Cited by 43 publications

References 70 publications

Graphene Oxide Encapsulating Liquid Metal to Toughen Hydrogel

Graphene Oxide Encapsulating Liquid Metal to Toughen Hydrogel

Ultrasound Imaging in Dentistry: A Literature Overview

A Universal Strategy for Constructing Robust and Antifouling Cellulose Nanocrystal Coating

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