ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Liuyan Tang,Shanshan Liao,Jinqing Qu
Aiming at the problem that the reported smart optical metallohydrogels were limited with poor mechanical properties, we reported here a novel smart optical metallohydrogel (Al-hydrogel) with excellent elongation, shape-memory ability, self-healing property, and controllable fluorescence intensity. The Al-hydrogel was obtained by the HHPMA–Al3+ and carboxylate–Al3+ coordination after one-pot micellar copolymerization of acrylic acid (AAc), acrylamide (AAm), and hydrophobic arylhydrazone-based ligand (HHPMA). This hydrogel was able to extend up to 5000% of its original length without fracture. Its emission intensity was tunable by OH–/H+ or Zn2+/AAc and increased by 500% with 0.1 M OH– or Zn2+. Its tunable fluorescence enabled us to repeatedly pattern it. A reversible system consisting of Fe3+/H+, was implemented to control the shape of the Al-hydrogel, endowing the Al-hydrogel with shape-memory ability. This highly stretchable and multifunctional Al-hydrogel has potential applications in information transmission, wearable devices, and flexible sensors.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 9
·2100198
·
IF 4.367
Shengqu Liu,Xiaoyu Wang,Yinjie Peng,Zhisen Wang,Rong Ran
Starch-based hydrogel is widely used as an excellent biocompatibility and biodegradability material. However, due to the disadvantages of poor mechanical properties, brittleness, and low stretchability attribute that remains a challenge to prepare multifunctional starch hydrogel integrating high stretchability, strength, and conducting capacity. In this study, macromolecular microspheres with various wettability are successfully incorporated into the hydrogel prepared using the carboxymethyl starch and polyacrylamide cross-linked by Fe 3+ and covalent cross-linker, respectively. The obtained double-network (DN) hydrogel performs good mechanical properties (the fracture stress 483 ± 38 kPa and the elongation at break 1615 ± 25%). Impressively, the obtained DN hydrogels by solvent soaking still maintain excellent mechanical strength and flexibility at −40 °C. Furthermore, it can be assembled to be a resistance-type strain sensor to detect multiscale strain. Therefore, the strategy can shed light on the preparation of multifunctional starch-based hydrogel for broad applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Dengfeng Zhang,Xu Luo,Rong Chen,Minjie Zhang,Fei Xiu,Xuemei Dong,Zifan Li,Zicheng Zhang,Chen Chen,Min Wang,Juqing Liu
Deep eutectic ionic elastomers (DEIEs) as emerging iontronic conductors have shown great interest in flexible and wearable electronics. However, developing DEIEs with high strength and extreme stretchability remains challenging. In this paper, we report a facile strategy to prepare superior DEIEs by directly photopolymerizing HEA and ChCl . The synthetic elastomer exhibits high mechanical properties, with fracture strength of 0.804 MPa and fracture strain up to 1814%. Impressively, this elastomer can tolerate cutting and lift as high as 5 kg (7700 times its own weight) without failure. Moreover, the DEIEs also possess outstanding optical transparency (>90% in the visible range), desirable conductivity (2.47 × 10 −5 s cm −1 ), and excellent self-healing ability (electrical healing efficiency of 99.9% within 0.2 s). Using their strain-dependent iontronic resistance properties, versatile iontronic sensors for motion detection could be realized for human health care.
研究领域:
材料科学
·
柔性电子学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Yang Qin,Jinpeng Wang,Chao Qiu,Xueming Xu,Zhengyu Jin
Most conventional synthetic hydrogels suffer from poor mechanical properties; despite recent significant progress in fabricating tough hydrogels, it is still a challenge to simultaneously realize high stretchability, self-recovery, and self-healing capability in a hydrogel. In this work, a new type of starch/PVA/borax hybrid dual cross-linked (DC) hydrogel was synthesized by a one-pot method. The as-prepared DC hydrogels exhibited mechanical properties of remarkable extensibility (ca. 2485%), excellent toughness (ca. 290.5 kJ m–3), high compression strength (ca. 547.8 kPa), rapid recoverability (81.9% energy recovery after 30 min), and free-shapeable behavior. More impressively, the DC gels sustained approximately 300 times their own weight and exhibited an outstanding self-healing capability at room temperature both in air and underwater. Furthermore, the adsorption amount of methylene blue onto the anionic DC gel (144.68 mg/g) was much higher than that of corn starch gel. Consequently, the eco-friendly, stable, and biodegradable hydrogels will have a great potential application in removing anionic dyes from the wastewater produced by agriculture and industry.
研究领域:
材料科学
·
环境科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 17
·8255-8261
·
IF 11.301
Yihe Wang,Chi Lv,Guochen Ji,Ruofei Hu,Junping Zheng
There are many studies about integrating supercapacitors to meet actual application needs, but challenges remain in assembling the device without a current collector and other additions. In this investigation, an all-in-one supercapacitor that integrates the electrodes, solid-electrolyte and current collectors was developed using a facile strategy. The method requires only some cheap and easily available experimental products including poly(vinyl alcohol) and polyaniline, and does not use advanced equipment. The all-in-one supercapacitor has good properties including being freestanding, self-healable and high stretchable. Specially, the tensile strength of supercapacitor electrode is close to 6 MPa and the elongation at break as high as around 700%. This work offers a versatile strategy to produce all-in-one energy-storage devices which are multifunctional and have potential applications for the future such as in wearable electronics.
研究领域:
材料科学
·
能源存储
·
柔性电子器件
✓ 已验证
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Yunlong Li,Xiubin Xu,Lijian Zhao,Danfeng Yu,Yanting Chen,Liangliang Du,Xu Wu
Hydrogels are considered as an ideal material for bioelectronic devices to fulfill the requirements of various applications. However, integrating self-adhesion properties, high stretchability, good sensing performance, and direction-aware functionality into a single hydrogel strain sensor remains a significant challenge and has been seldom reported. In this study, through the characteristics of montmorillonite (MMT) adsorption, we designed a gradient intersecting strategy based on bifunctional MMT nanoparticles. These nanoparticles act as both cross-linking agents and conductive components to strongly intersect the hydrogel and the conductive networks, preventing them from sliding against each other. Thus, the hydrogel sensor had a wide range of adjustable mechanical properties and good adhesion on various substrates. Moreover, the hydrogel sensor can detect both large- and small-scale human activities and achieves direction awareness. Importantly, the hydrogel sensor can be used to construct a wireless sensor system to monitor human movement in real time. This work provides a strategy for the design of the next-generation flexible strain sensors and a method for the development of multifunctional MMT materials, expanding the application of both MMT materials and hydrogel sensors.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
传感器技术
·
柔性电子
✓ 已验证
DOI
高影响因子
Nano Research
·
2023
·Vol. 16
·期 9
·11638-11645
·
IF 9.9
Zhu Qianqian,Liao Weiqiang,Sun Cong,Qin Xuan,Zhang Fangjia,Ji Haifeng,Li Yuqi,Wen Zhen,Sun Xuhui
The rapid development of wearable electronic products brings challenges to corresponding power supplies. In this work, a thermally stable and stretchable ionogel-based triboelectric nanogenerator (SI-TENG) for biomechanical energy collection is proposed. The ionic conductivity of the ionogel increased to 0.53 S·m −1 through optimal regulation of the amount of aminoterminated hyperbranched polyamide (NH 2 -HBP), which also has high strain of 812%, excellent stretch recovery, and wide operating temperature range of −80 to 250 °C. The SI-TENG with this ionogel as electrode and silicone rubber both as the triboelectric layer and encapsulation layer exhibits high temperature stability, stretchability, and washability. By adding appropriate amount of nano SiO 2 to triboelectric layer, the output performance is further improved by 93%. Operating in single-electrode mode at 1.5 Hz, the outputs of a SI-TENG with an area of 3 cm × 3 cm are 247 V, 11.7 µA, 78 nC, and 3.2 W·m −2 , respectively. It was used as a self-charging power supply to charge a 22 µF capacitor to 1.6 V in 167 s with the palm patting and then to power the electronic calculator. Furthermore, the SI-TENG can also be used as a self-powered motion sensor to detect the amplitude and frequency of finger bending, human swallowing, nodding, and shaking of the head motion changes through the analysis of the output voltage.
研究领域:
可穿戴电子器件
·
纳米发电机
·
能量收集
·
柔性电子
·
自供能传感器
✓ 已验证
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2023
·
IF 2.5
Jinghong Wang,Jiayi Liu,Zeyan Wang,Nana Huang,Jiao Han,Naiku Xu,Jiahan Zhang,Xiangyuan Yan,Yaqi Li
Mixed valent iron ions were used to create a flexible ionic crosslinking network through coordination, making PAA fiber highly stretchable, and the fiber was highly stretched to tear graphene oxide (GO) sheets into discontinuously-dispersed monolayer sheets. The monolayer sheets could construct many hydrogen bonds with PAA chains to serve as knots to hinder chain movement, controlling the shrinkage of stretched fiber. Co-solvent formamide could improve the heat resistance of PAA fiber through special calorific effect; thus the highly-stretched fiber could tolerate high temperature heat setting. Due to the advanced structure induced by stretching, internal force relaxation caused by heat setting, and the existence of knots, the resulting fiber possessed the features of high strength and no shrinkage. High strength made the fiber mechanically applicable, and the unshrinkability could help it to maintain large specific surface area and strong iron ions-immobilizing capability. As a result, the catalytic activity of non-shrinkable fiber was increased by 25% compared with that of shrinkable fiber for methylene blue (MB) decolorization, and iron ion loading ratio was increased by 174.5%; however, iron ion leaching ratio was decreased by 76.5%, which was conducive to reusability improvement. Thereby, the resulting fiber could be repeatedly used to decolorize MB.
研究领域:
材料科学
·
化学工程
·
环境科学
·
高分子科学
·
催化
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 45
·25399-25407
·
IF 12.732
Xin Qi,Jichuan Zhang,Liqun Zhang,Dongmei Yue
Fabricating materials with a combination of high toughness, and self-healing, shape memory and reprocessing properties, especially derived from renewable precursors, remains a challenge. Herein, we demonstrate a simple strategy to prepare a multifunctional elastomer based on a semi-interpenetrating dynamic network (semi-IDN) by using sustainable Eucommia ulmoides gum (EUG) as a raw material. The elastomer possessed high stretchability (∼876%) and high tensile strength (∼12.1 MPa) as well as good self-healing, solid plasticity and shape memory properties. Moreover, it can not only be reprocessed by hot pressing (tensile strength remains 92% after three times of reprocessing), but can also be recycled by dissolving with little effect on the structure and properties. In addition, a flexible electronic device is prepared by spraying hydroxylated multiwalled carbon nanotubes (MWCNTs-OH) on its surface, which exhibited good self-healing of electrical conductivity after damage. The semi-IDN concept provides a new pathway to prepare reprocessed materials, and the as-prepared elastomers have broad application prospects in new generation green rubber and flexible wearable devices.
研究领域:
材料科学
·
可持续材料
·
聚合物科学
·
柔性电子
✓ 已验证
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 61
·期 1
·154-166
·
IF 1.917
Ximan Bu,Yongxin Ge,Lei Wang,Linlin Wu,Xiaofeng Ma,Duyou Lu
Nonvolatile deep eutectic solvent (DES) electrolytes with good electrochemical stability have recently emerged as promising electrolytes for energy storage devices. In this report, for the first time a polymerized zwitterionic molecule was introduced and a series of hybrid cross-linked zwitterion-containing copolymer DES gels are synthesized via UV initiated free-radical copolymerization of acrylic acid (AA), sulfobetaine vinylimidazole (VIPS) and poly(ethylene glycol) diacrylate (PEGDA) monomers, in situ within DES, which is prepared from 1:2 M ratio of choline chloride and ethylene glycol. Systematically varying the AA:VIPS molar ratio and copolymer contents within the copolymer network enables one to widely tune the mechanical properties and ionic conductivity of the poly(AA- co -VIPS) DES gels. The tensile strength of P(AA- co -VIPS) DES gels significantly increased from 28 kPa to 176 kPa with fracture strain from 720% to 1370%, while the ionic conductivity of copolymer DES gels remains high from 2.7 to 4.1 mS cm −1 with the increase of copolymer content from 25 wt % to 45 wt%. A copolymer DES gel not only enables a supercapacitor deliver high capacitance of 71.52 F g −1 at 0.5 A g −1 , and retains ∼97% of its capacitance after 2000 cycles, but also achieves outstanding capacitive performance over wide temperature range.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）