A removable, antibacterial and strong adhesive based on hyperbranched catechol polymers

Liu, Changjun; Xie, Xianhua; Kong, Xiaoling; Zhang, Qian; Yang, Jumin; Yang, Jianhai; Wang, Wei

doi:10.1016/j.matlet.2022.132019

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…Therefore, minor cellulose signals have also been observed, which can be ascribed to the remaining unreacted AGU rings. 40,41 Similar to 13 C NMR, some small peaks in 1 H NMR spectra were also assigned to the remaining cellulose. Solid-state 13 C CP-MAS NMR was further conducted on pulp, DAC and DCNRs.…”

Section: Characterizations Of Dcnrsmentioning

confidence: 76%

“…The four intense peaks of 13 C NMR between 60-105 ppm range were assigned to C1, C4 and C5, C2, C3 and C6, respectively, indicating a high ringopening degree. 40,41 According to titration results of aldehyde content, the total oxidization degree was 70.6%. Therefore, minor cellulose signals have also been observed, which can be ascribed to the remaining unreacted AGU rings.…”

Section: Characterizations Of Dcnrsmentioning

confidence: 99%

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All-cellulose hydrogel-based adhesive

Sun,

Pang,

Zhu

et al. 2023

TIMS

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<p>Hydrogels showing strong adhesion to different substrates have garnered significant attention for engineering applications. However, the current development of such hydrogel-based adhesive is predominantly limited to synthetic polymers, owing to their exceptional performance and an extensive array of chemical options. To advance the development of sustainable hydrogel-based adhesives, we successfully create a highly robust all-cellulose hydrogel-based adhesive, which is composed of concentrated dialcohol cellulose nanorods (DCNRs) and relies on enhanced hydrogen bonding interactions between cellulose and the substrate. We implement a sequential oxidization-reduction process to achieve this high-performance all-cellulose hydrogel, which is realized by converting the two secondary hydroxyl groups within an anhydroglucose unit into two primary hydroxyl groups, while simultaneously linearizing the cellulose chains. Such structural and chemical modifications on cellulose chains increase out-of-plane interactions between the DCNRs hydrogel and substrate, as simulations indicate. Additionally, these modifications enhance the flexibility of the cellulose chains, which would otherwise be rigid. The resulting all-cellulose hydrogels demonstrate injectability and strong adhesion capability to a wide range of substrates, including wood, metal, glass, and plastic. This green and sustainable all-cellulose hydrogel-based adhesive holds great promise for future bio-based adhesive design.</p>

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Section: Characterizations Of Dcnrsmentioning

confidence: 76%

Section: Characterizations Of Dcnrsmentioning

confidence: 99%

All-cellulose hydrogel-based adhesive

Sun,

Pang,

Zhu

et al. 2023

TIMS

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“…This poses a notable barrier to the practical application of HBPs that are obtained through the aforementioned methods. For this reason, co-polyaddition of monomer mixtures of different types, for example, A2+B3, A2+B4, etc., have found wider application [19][20][21][22][23][24][25][26][27][28] (Scheme 1). Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Investigation of the Polyaddition of an AB2+A2+B4 Monomer Mixture

Karpov,

Iakunkov,

Chernyaev

et al. 2024

Polymers

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Hyperbranched polymers (HBPs) are widely applied nowadays as functional materials for biomedicine needs, nonlinear optics, organic semiconductors, etc. One of the effective and promising ways to synthesize HBPs is a polyaddition of AB2+A2+B4 monomers that is generated in the A2+CB2, AA′+B3, A2+B′B2, and A2+C2+B3 systems or using other approaches. It is clear that all the foundational features of HBPs that are manufactured by a polyaddition reaction are defined by the component composition of the monomer mixture. For this reason, we have designed a structural kinetic model of AB2+A2+B4 monomer mixture polyaddition which makes it possible to predict the impact of the monomer mixture’s composition on the molecular weight characteristics of hyperbranched polymers (number average (DPn) and weight average (DPw) degree of polymerization), as well as the degree of branching (DB) and gel point (pg). The suggested model also considers the possibility of a positive or negative substitution effect during polyaddition. The change in the macromolecule parameters of HBPs formed by polyaddition of AB2+A2+B4 monomers is described as an infinite system of kinetic equations. The solution for the equation system was found using the method of generating functions. The impact of both the component’s composition and the substitution effect during the polyaddition of AB2+A2+B4 monomers on structural and molecular weight HBP characteristics was investigated. The suggested model is fairly versatile; it makes it possible to describe every possible case of polyaddition with various monomer combinations, such as A2+AB2, AB2+B4, AB2, or A2+B4. The influence of each monomer type on the main characteristics of hyperbranched polymers that are obtained by the polyaddition of AB2+A2+B4 monomers has been investigated. Based on the results obtained, an empirical formula was proposed to estimate the pg = pA during the polyaddition of an AB2+A2+B4 monomer mixture: pg = pA = (−0.53([B]0/[A]0)1/2 + 0.78)υAB2 + (1/3)1/2([B]0/[A]0)1/2, where (1/3)1/2([B]0/[A]0)1/2 is the Flory equation for the A2+B4 polyaddition, [A]0 and [B]0 are the A and B group concentration from A2 and B4, respectively, and υAB2 is the mole fraction of the AB2 monomer in the mixture. The equation obtained allows us to accurately predict the pg value, with an AB2 monomer content of up to 80%.

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“…The adhesion properties of the gel can be significantly improved by introducing catechol groups, [18][19][20] but it is easy to chelate heavy metal ions and exhibits potential toxicity, which makes it difficult to be applied to direct adhesion to human skin. [21] Double networks by constructing chemical-chemical double crosslinks can significantly improve the mechanical properties of hydrogels, [16,22] but inevitably, chemical crosslinks do not have dynamic reversible adhesion and their permanent fracture can limit their applications in skin sensing.…”

Section: Introductionmentioning

confidence: 99%

Highly Stretchable and Adhesive Poly (N, N‐dimethylacrylamide)/Laponite Nanocomposite Hydrogels for Wearable Sensor Devices

Zhou

Xie

et al. 2022

ChemistrySelect

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As a polymeric soft material, hydrogel is a good candidate for smart skin-like sensors. However, in practical applications conventional, hydrogels face the challenges of mechanical properties, poor electrical conductivity and inability to adhere well to the material surface to withstand high tensile strength. Therefore, the development of multifunctional hydrogels can solve some of these technical problems. In this work, we chose the nanoclay Laponite as a cross-linking agent and prepared poly (N, N-dimethylacrylamide)/Laponite nanocomposite (PDMAA/Laponite NC) hydrogels with excellent tensile (0.04 ∼ 0.08 MPa), adhesion (4.3 MPa) and electrochemical properties by initiating the free radical polymerization of polymer monomers under UV light. The hydrogel network is formed by multiple physical interactions between polymer chains and clay particles, conferring the reversible adhesion ability of the gel on various substrates. Considering the ease of preparation and comprehensive high performance, our nanocomposite hydrogels may have potential applications in wearable sensors and flexible electronic devices.

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A removable, antibacterial and strong adhesive based on hyperbranched catechol polymers

Cited by 11 publications

References 13 publications

All-cellulose hydrogel-based adhesive

All-cellulose hydrogel-based adhesive

A Theoretical Investigation of the Polyaddition of an AB2+A2+B4 Monomer Mixture

Highly Stretchable and Adhesive Poly (N, N‐dimethylacrylamide)/Laponite Nanocomposite Hydrogels for Wearable Sensor Devices

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