Equip the hydrogel with armor: strong and super tough biomass reinforced hydrogels with excellent conductivity and anti-bacterial performance

Zhang, Xiao; Liu, Weifeng; Cai, Junqi; Huang, Jinhao; Qiu, Xueqing

doi:10.1039/c9ta10509c

Cited by 100 publications

(78 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Large numbers of nanoparticles appeared in TA@LS−Ag‐5 compared with pure PVA (Figure a), demonstrating that TA@LS−Ag could disperse evenly in the PVA matrix with the average particle size of about 20 nm. The mapping image of silver element was consistent with sulfur element in LS (Figure c, d), suggesting that Ag NPs were absorbed on TA@LS and verifying that LS promoted the absorption of silver ions . The SEM image of TA@LS−Ag‐5 also demonstrated the homogeneous distribution of the nanoscale antibacterial agent TA@LS−Ag in the PVA matrix (Figure e), but some aggregates appeared when the amount of TA@LS−Ag reached up to 10 wt % (Figure f).…”

Section: Resultssupporting

confidence: 59%

“…LS is rich in hydrophilic hydroxy and sulfonic acid groups and also contains the hydrophobic phenylpropane structure, which has been widely used as a dispersing agent . The polar functional groups in TA and LS can promote the adsorption of Ag ions . Introducing TA as a natural reducing agent and LS as a green carrier to prepare silver‐containing antibacterial agent not only ensures good interfacial compatibility with PVA but also realizes the high‐value utilization of biomass resources.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Very Strong, Super‐Tough, Antibacterial, and Biodegradable Polymeric Materials with Excellent UV‐Blocking Performance

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this work, inspired by the dynamic sacrificial hydrogen bonds in biological materials, a very strong, super-tough, antibacterial, and cost-effective biodegradable poly(vinyl alcohol) (PVA) nanocomposite material was developed by incorporating the nanoscale antibacterial agent TA@LSÀ Ag. TA@LSÀ Ag was prepared from the green biomass tannic acid (TA) and sodium lignosulfonate (LS), and was facilely incorporated into the PVA matrix with a homogeneously interspersed nanoparticle size of about 20 nm. The PVA nanocomposite film with 2 wt % addition of TA@LSÀ Ag achieved the highest specific toughness of 262 J g À 1 among the PVA-based films to date, which is far higher than that of natural spider silk (150-190 J g À 1), as well as a very high tensile strength of 131.6 MPa. The excellent tensile strength and superior toughness were attributed to synergy of the nanophase separation structure and the intense hydrogen-bonding interactions between the nanoparticles and PVA matrix. The PVA/TA@LSÀ Ag nanocomposite films exhibited good antibacterial properties, despite the extremely low silver content (0.032-0.32 wt %). TA@LSÀ Ag also endowed the PVA films with excellent antioxidant and UV-shielding performance. As the biomass-derived LS and TA and the PVA matrix are all biodegradable, this work offers a facile strategy for preparing high-performance antibacterial and biodegradable polymeric materials.

show abstract

Section: Resultssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Very Strong, Super‐Tough, Antibacterial, and Biodegradable Polymeric Materials with Excellent UV‐Blocking Performance

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Ag NPs were used as hard armor on hydrogel surface, which also endowed the hydrogel with excellent antibacterial properties and conductivity (7.1 S m −1 ). [139] PVA hydrogel can be physically crosslinked by freezing without additional crosslinking agent. Lin et al fabricated a conductive hydrogel by mixing polydopamine decorated silver nanoparticles (PDA@Ag NPs), 3-aminophenylboronic acid (ABA), aniline (AN), PVA, and then freezing overnight at −40 °C to form PVA crystalline domains, which was named as PDA@Ag NPs/CPHs.…”

Section: Pva@ag Hydrogelsmentioning

confidence: 99%

Section: Peg@ag Hydrogelsmentioning

confidence: 99%

Antibacterial Hybrid Hydrogels

Cao

Luo

et al. 2020

Macromolecular Bioscience

121

View full text Add to dashboard Cite

Bacterial infectious diseases and bacterial‐infected environments have been threatening the health of human beings all over the world. In view of the increased bacteria resistance caused by overuse or improper use of antibiotics, antibacterial biomaterials are developed as the substitutes for antibiotics in some cases. Among them, antibacterial hydrogels are attracting more and more attention due to easy preparation process and diversity of structures by changing their chemical cross‐linkers via covalent bonds or noncovalent physical interactions, which can endow them with various specific functions such as high toughness and stretchability, injectability, self‐healing, tissue adhesiveness and rapid hemostasis, easy loading and controlled drug release, superior biocompatibility and antioxidation as well as good conductivity. In this review, the recent progress of antibacterial hydrogel including the fabrication methodologies, interior structures, performances, antibacterial mechanisms, and applications of various antibacterial hydrogels is summarized. According to the bacteria‐killing modes of hydrogels, several representative hydrogels such as silver nanoparticles‐based hydrogel, photoresponsive hydrogel including photothermal and photocatalytic, self‐bacteria‐killing hydrogel such as inherent antibacterial peptides and cationic polymers, and antibiotics‐loading hydrogel are focused on. Furthermore, current challenges of antibacterial hydrogels are discussed and future perspectives in this field are also proposed.

show abstract

“…However, despite the great improvement in the environmental stability, the conductivity of the organohydrogels is reduced owing to the decreased water content, which restricts their potential application in the field of wearable strain sensors. To address this problem, a representative strategy is to build composite gels with the introduction of conductive components, such as conductive polymers, [14] metal ions, [15][16][17] liquid metal, [18] ionic liquid, [19] carbon nanotubes, [20,21] graphene, [22,23] PEDOT:PSS, [24,25] and MXene nanosheets. [26,27] Among these, MXenes show tremendous potential in the fabrication of conductive organohydrogels owing to their superior electrical conductivity, large specific surface area, excellent hydrophilicity, and remarkable mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

MXene‐Based Conductive Organohydrogels with Long‐Term Environmental Stability and Multifunctionality

Yuan

Xiang

et al. 2020

Adv Funct Materials

249

184

View full text Add to dashboard Cite

Conductive hydrogels are promising interface materials utilized in bioelectronics for human-machine interactions. However, the low-temperature induced freezing problem and water evaporation-induced structural failures have significantly hindered their practical applications. To address these problems, herein, an elaborately designed nanocomposite organohydrogel is fabricated by introducing highly conductive MXene nanosheets into a tannic acid-decorated cellulose nanofibrils/polyacrylamide hybrid gel network infiltrated with glycerol (Gly)/water binary solvent. Owing to the introduction of Gly, the as-prepared organohydrogel demonstrates an outstanding flexibility and electrical conductivity under a wide temperature spectrum (from −36 to 60 °C), and exhibits long-term stability in an open environment (>7 days). Additionally, the dynamic catechol-borate ester bonds, along with the readily formed hydrogen bonds between the water and Gly molecules, further endow the organohydrogel with excellent stretchability (≈1500% strain), high tissue adhesiveness, and self-healing properties. The favorable environmental stability and broad working strain range (≈500% strain); together with high sensitivity (gauge factor of 8.21) make this organohydrogel a promising candidate for both large and subtle motion monitoring.

show abstract

Equip the hydrogel with armor: strong and super tough biomass reinforced hydrogels with excellent conductivity and anti-bacterial performance

Abstract: Inspired by the hard-shelled pangolins, a bionic hydrogel structure with hard nano silver armor and soft interior was fabricated with outstanding tensile strength and toughness, excellent electrical conductivity and good antibacterial properties.

Cited by 100 publications

References 62 publications

Very Strong, Super‐Tough, Antibacterial, and Biodegradable Polymeric Materials with Excellent UV‐Blocking Performance

Very Strong, Super‐Tough, Antibacterial, and Biodegradable Polymeric Materials with Excellent UV‐Blocking Performance

Antibacterial Hybrid Hydrogels

MXene‐Based Conductive Organohydrogels with Long‐Term Environmental Stability and Multifunctionality

Contact Info

Product

Resources

About