Flexible, sensitive and rapid humidity-responsive sensor based on rubber/aldehyde-modified sodium carboxymethyl starch for human respiratory detection

Zheng, Zhongjie; Li, Yang; Yang, Yunpeng; Li, Luji; Lin, Baofeng; Fu, Lihua; Xu, Chuanhui

doi:10.1016/j.carbpol.2023.120625

Cited by 19 publications

(9 citation statements)

References 44 publications

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“…The fracture strain (1520%) and strength (0.26 MPa) of the ADM gel were significantly higher than those of pure PDMAPS, ADM-II, and the previously reported gels. [24] The mechanical properties of the ADM gel improved, which can be attributed to the dual network structure and multiple reversible interactions. MXene nanosheets with abundant active groups can establish noncovalent crosslinking interactions, such as hydrogen bonds and electrostatic interactions, between the PDMAPS and AP molecular chains.…”

Section: Resultsmentioning

confidence: 97%

“…f) GCD curves at different current densities from 0.5 to 3.0 mA cm −2 . g,h) Radar plots of the comprehensive performance: Comparison between this work and currently reported g) starch-based gels (ref [24],. ref [31],.…”

mentioning

confidence: 90%

“…g,h) Radar plots of the comprehensive performance: Comparison between this work and currently reported g) starch-based gels (ref. [24], ref. [31], ref.…”

Section: Self-adhesion Performancementioning

confidence: 99%

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An Ultrahighly Stretchable and Recyclable Starch‐Based Gel with Multiple Functions

Yang

Cui

et al. 2023

Advanced Materials

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With the development of various gel‐based flexible sensors, novel gels with multiple integrated and efficient properties, particularly recyclability, have been developed. Herein, a starch‐based ADM (Amylopectin (AP)‐poly 3‐[Dimethyl‐[2‐(2‐methylprop‐2‐ enoyloxy)ethyl]azaniumyl]propane‐1‐sulfonate (PDMAPS)‐MXene) gel is prepared by a facile “cooking” strategy accompanying the gelatinization of AP and polymerization reaction of zwitterionic monomers. Reversible crosslinking in the gel occurs through hydrogen bonding and electrostatic interactions. The ADM gel exhibits high stretchability (∼2700%, after one month), swift self‐healing performance, self‐adhesive properties, favorable freezing resistance, and satisfactory moisturizing properties (≥30 d). Interestingly, ADM gel can be recycled and reused by a “kneading” method and “dissolution‐dialysis” process, respectively. Furthermore, the ADM gel can be assembled as a strain sensor with a broad working strain range (∼800%) and quick response time (response time 211 ms and recovery time 253 ms, under 10% strain) to detect various macro‐ and micro‐human motions, even under harsh conditions such as pronunciation and handwriting. The ADM gel can also be used as a humidity sensor to investigate humidity and human respiratory status, suggesting its practical application in personal health management. This study provides a novel strategy for the preparation of high‐performance recycled gels and flexible sensors.This article is protected by copyright. All rights reserved

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Section: Resultsmentioning

confidence: 97%

mentioning

confidence: 90%

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An Ultrahighly Stretchable and Recyclable Starch‐Based Gel with Multiple Functions

Yang

Cui

et al. 2023

Advanced Materials

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“…Unfortunately, most of the pristine natural polymers lack essential stretchability and are electrical insulators, which hinders their development in the field of flexible humidity sensor. A strategy of using a composite that incorporates natural polymers with rubbers or conductive fillers is an effective method to make the best use of natural polymers in a flexible humidity sensor . The stability and mechanical properties of the sensors fabricated based on composite materials are largely determined by the compositional constitution.…”

Section: Humidity Sensor Materialsmentioning

confidence: 99%

“…A strategy of using a composite that incorporates natural polymers with rubbers or conductive fillers is an effective method to make the best use of natural polymers in a flexible humidity sensor. 15 The stability and mechanical properties of the sensors fabricated based on composite materials are largely determined by the compositional constitution. Table 1 lists both the environmentally friendly and unfriendly composite materials currently used in humidity sensors.…”

Section: Humidity Sensor Materialsmentioning

confidence: 99%

Recent Progress on Environmentally Friendly Humidity Sensor: A Mini Review

Huang

Jiang

Liu

2023

ACS Appl. Electron. Mater.

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Due to the impact of the epidemic, human health is seriously threatened so that the technology of human health detection is increasingly important, and humidity sensors for detecting human health have been studied extensively. A number of humidity sensors made of a variety of different materials and based on multiple principles have been prepared, which can be classified into numerous categories. This article starts out by introducing sensor materials according to environmentally friendliness. Following that, a variety of structures for humidity sensors, the mechanisms for sensing, and different power supply types are discussed. This study summarizes the review of current research in this field as well as challenges that exist, indicating the focus of possible future research and application prospects. This work may pave the way to understanding the overview of humidity sensing.

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A High‐Sensitive Rubber‐Based Sensor with Integrated Strain and Humidity Responses Enabled by Bionic Gradient Structure

Yang,

Kong,

Huang

et al. 2024

Adv Funct Materials

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Real‐time detection of different physiological characteristics is crucial for human physical and mental health. A detection system with multimodal sensing capability, high sensitivity, excellent mechanical properties, and environmental stability is highly desirable, but it is still a great challenge. Inspired by the structural gradient of biological tissues, a multifunctional sensor based on carboxylic styrene butadiene rubber (XSBR) and sodium polyacrylate (PAANa) non‐covalently modified MXenes is prepared in this study, in which the MXenes exhibit a gradient distribution and simultaneously formed an orientation arrangement at the bottom of the matrix through the formation of hydrogen bonding interactions with PAANa. The material shows a considerable stretchability of 244% and strength of 7.67 MPa, high electrical conductivity of 55.40 S m‒1, low percolation threshold of 2.48 wt%, and excellent response to strain (gauge factor of 906.7 within 98% strain) and humidity (relative resistance change of 530% within 11–93% relative humidity). Based on the superior performances of the XSBR/PAANa/MXene composite, an integrated detection system is designed to accurately detect respiration and body movements at various scales. This work provides a new perspective for the development of a novel biomimetic functional material for sensor applications.

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Flexible, sensitive and rapid humidity-responsive sensor based on rubber/aldehyde-modified sodium carboxymethyl starch for human respiratory detection

Cited by 19 publications

References 44 publications

An Ultrahighly Stretchable and Recyclable Starch‐Based Gel with Multiple Functions

An Ultrahighly Stretchable and Recyclable Starch‐Based Gel with Multiple Functions

Recent Progress on Environmentally Friendly Humidity Sensor: A Mini Review

A High‐Sensitive Rubber‐Based Sensor with Integrated Strain and Humidity Responses Enabled by Bionic Gradient Structure

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