Mechanical robust and highly conductive composite hydrogel reinforced by a combination of cellulose nanofibrils/polypyrrole toward high-performance strain sensor

He, Xiao-Feng; Zeng, Zi-Fan; Ni, Qing-Yue; Xu, Zhi-Chao; Mao, Peng-Fei; Jiang, Baiyu; Wu, Qiang; Wang, Ben; Gong, Li-Xiu; Tang, Long-Cheng; Li, Shi-Neng

doi:10.1016/j.compositesb.2023.111022

Cited by 18 publications

(4 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4f). 78 Due to multiple physical interactions, including metal coordination and hydrogen bonding, the PPy chains were entangled in the system, and PPy could be further modified by in situ polymerisation induced by trivalent ferric ions, as well as the synergistic covalent cross-linking between polymers, effectively strengthening and toughening the hydrogel. Moreover, the system constituted a conductive pathway that mixed the ionic conductive mechanism of the trivalent iron ions with the electronic conductive mechanism of PPy, which led to the enhancement of conductivity (995 mS m −1 ) and sensing performance of the conductive nanocomposite hydrogels.…”

Section: Design Of Conductive Nanocomposite Hydrogels and Classificat...mentioning

confidence: 99%

Conductive nanocomposite hydrogels for flexible wearable sensors

Guo,

2024

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

Section: Design Of Conductive Nanocomposite Hydrogels and Classificat...mentioning

confidence: 99%

Conductive nanocomposite hydrogels for flexible wearable sensors

Guo,

2024

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…Owing to their good biocompatibility, , high electrical conductivity, , and high tensile toughness, conductive hydrogels have been gaining attention in the field of stretchable electronic devices. , Furthermore, these devices have been widely used in motion monitoring, respiratory monitoring, human–computer interactions, and artificial skins …”

Section: Introductionmentioning

confidence: 99%

Self-Healing, Freeze-Resistant, and Sustainable Aloe Polysaccharide-Based Hydrogels for Multifunctional Sensing

Xiao,

Lao,

Liu

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Although designing wearable sensors by using sustainable hydrogels has been gaining widespread attention, the fabrication of inexpensive biobased hydrogel sensors with fast selfhealing and antibacterial abilities remains challenging. In this study, biobased green hydrogels were prepared from aloe vera polysaccharides (AP), poly(vinyl alcohol), and sodium alginate (SA). Their mechanical, electrical, biodegradable, and self-healing characteristics were investigated. The hydrogel with an AP/SA ratio of 9:2 demonstrated excellent tensile properties with an elongation at break, tensile toughness, and electrical conductivity of 1477.3%, 1.19 MJ/m 3 , and 12.67 × 10 −2 S/m, respectively. The hydrogel remained electrically conductive at −20 °C. During strain sensing, it exhibited excellent stability and sensitivity (gauge factor: 9.2), a wide strain range (up to 1400%), and a high self-healing efficiency of 96.1% over 4 min. It was also able to detect low strains (1%). These properties enabled the hydrogel assembly into wearable sensors to monitor physiological signals generated by large movements of body joints, small facial expression changes, talking, and drinking. An assembled humidity sensor detected relative humidity levels of 45−98% and monitored human body respiration patterns in different exercise states. Consequently, the prepared hydrogel is a potential functional material for sustainable, flexible, wearable electronics.

show abstract

“…As a sensor material, poor mechanical properties will limit the application range of sensors [34][35][36]; therefore, enhancing the mechanical properties via nano-reinforcement methods while ensuring high self-healing properties is a feasible approach. Carboxylated nanofibrillated cellulose (CNF) has rich functional groups with excellent mechanical properties [32,37,38], and it can enhance the mechanical properties of hydrogel as a nano-filler [39,40]. Moreover, the hydroxyl groups on the molecular chain can provide a large number of cross-linking points for the composite hydrogel, so as to further entangle the internal network structure and enhance the energy dissipation capacity of the hydrogel network [41][42][43].…”

Section: Introductionmentioning

confidence: 99%

A High-Stretching, Rapid-Self-Healing, and Printable Composite Hydrogel Based on Poly(Vinyl Alcohol), Nanocellulose, and Sodium Alginate

Li,

Wang,

Wei

et al. 2024

Gels

View full text Add to dashboard Cite

Hydrogels with excellent flexibility, conductivity, and controllable mechanical properties are the current research hotspots in the field of biomaterial sensors. However, it is difficult for hydrogel sensors to regain their original function after being damaged, which limits their practical applications. Herein, a composite hydrogel (named SPBC) of poly(vinyl alcohol) (PVA)/sodium alginate (SA)/cellulose nanofibers (CNFs)/sodium borate tetrahydrate was synthesized, which has good self-healing, electrical conductivity, and excellent mechanical properties. The SPBC0.3 hydrogel demonstrates rapid self-healing (<30 s) and achieves mechanical properties of 33.92 kPa. Additionally, it exhibits high tensile strain performance (4000%). The abundant internal ions and functional groups of SPBC hydrogels provide support for the good electrical conductivity (0.62 S/cm) and electrical response properties. In addition, the SPBC hydrogel can be attached to surfaces such as fingers and wrists to monitor human movements in real time, and its good rheological property supports three-dimensional (3D) printing molding methods. In summary, this study successfully prepared a self-healing, conductive, printable, and mechanically superior SPBC hydrogel. Its suitability for 3D-printing personalized fabrication and outstanding sensor properties makes it a useful reference for hydrogels in wearable devices and human motion monitoring.

show abstract

Mechanical robust and highly conductive composite hydrogel reinforced by a combination of cellulose nanofibrils/polypyrrole toward high-performance strain sensor

Cited by 18 publications

References 61 publications

Conductive nanocomposite hydrogels for flexible wearable sensors

Conductive nanocomposite hydrogels for flexible wearable sensors

Self-Healing, Freeze-Resistant, and Sustainable Aloe Polysaccharide-Based Hydrogels for Multifunctional Sensing

A High-Stretching, Rapid-Self-Healing, and Printable Composite Hydrogel Based on Poly(Vinyl Alcohol), Nanocellulose, and Sodium Alginate

Contact Info

Product

Resources

About