Nanomaterials
·
2025
·Vol. 15
·期 13
·1027
·
IF 4.3
Qingyun Zheng,Jingyuan Liu,Rongrong Chen,Qi Liu,Jing Yu,Jiahui Zhu,Peili Liu
Hydrogel sensors show unique advantages in underwater detection, ocean monitoring, and human–computer interaction because of their excellent flexibility, biocompatibility, high sensitivity, and environmental adaptability. However, due to the water environment, hydrogels will dissolve to a certain extent, resulting in insufficient mechanical strength, poor long-term stability, and signal interference. In this paper, a double-network structure was constructed by polyvinyl alcohol (PVA) and poly([2-(methacryloyloxy) ethyl]7 dimethyl-(3-sulfopropyl) ammonium hydroxide) (PSBMA). The resultant PVA/PSBMA-PA hydrogel demonstrated notable swelling resistance, a property attributable to the incorporation of non-covalent interactions (electrostatic interactions and hydrogen bonding) through the addition of phytic acid (PA). The hydrogel exhibited high stretchability (maximum tensile strength up to 304 kPa), high conductivity (5.8 mS/cm), and anti-swelling (only 1.8% swelling occurred after 14 days of immersion in artificial seawater). Assembled as a sensor, it exhibited high strain sensitivity (0.77), a low detection limit (1%), and stable electrical properties after multiple tensile cycles. The utilization of PVA/PSBMA-PA hydrogel as a wearable sensor shows promise for detecting human joint movements, including those of the fingers, wrists, elbows, and knees. Due to the excellent resistance to swelling, the PVA/PSBMA-PA-based sensors are also suitable for underwater applications, enabling the detection of underwater mannequin motion. This study proposes an uncomplicated and pragmatic methodology for producing hydrogel sensors suitable for use within subaquatic environments, thereby concomitantly broadening the scope of applications for wearable electronic devices.
研究领域:
生物材料
·
传感器技术
·
柔性电子器件
·
人机交互
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Membranes
·
2021
·Vol. 12
·期 1
·2
·
IF 4.106
Qiang Xue,Kaisong Zhang
Nanomaterials embedded in nanofiltration membranes have become a promising modification technology to improve separation performance. As a novel representation of two-dimensional (2D) nanomaterials, MXene has nice features with a strong negative charge and excellent hydrophilicity. Our previous research showed that MXene nanosheets were added in the aqueous phase, which enhanced the permeselectivity of the membrane and achieved persistent desalination performance. Embedding the nanomaterials into the polyamide layer through the organic phase can locate the nanomaterials on the upper surface of the polyamide layer, and also prevent the water layer around the hydrophilic nanomaterials from hindering the interfacial polymerization reaction. We supposed that if MXene nanosheets were added in the organic phase, MXene nanosheets would have more negative contact sites on the membrane surface and the crosslinking degree would increase. In this study, MXene were dispersed in the organic phase with the help of ultrasound, then MXene nanocomposite nanofiltration membranes were achieved. The prepared MXene membranes obtained enhanced negative charge and lower effective pore size. In the 28-day persistent desalination test, the Na2SO4rejection of MXene membrane could reach 98.6%, which showed higher rejection compared with MXene embedded in aqueous phase. The results of a long-time water immersion test showed that MXene membrane could still maintain a high salt rejection after being soaked in water for up to 105 days, which indicated MXene on the membrane surface was stable. Besides MXene membrane showed high rejection for high-concentration brine and good mono/divalent salt separation performance in mono/divalent mixed salt solutions. As a part of the study of MXene in nanofiltration membranes, we hoped this research could provide a theoretical guidance for future research in screening different addition methods and different properties.Keywords:MXene;nanofiltration;anti-swelling;mono/divalent ion separation;high saline removal
研究领域:
材料科学
·
环境工程
·
膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 1
·2210188
·
IF 19.924
Menghan Pi,Shanhe Qin,Sihan Wen,Zhisen Wang,Xiaoyu Wang,Min Li,Honglang Lu,Qingdang Meng,Wei Cui,Rong Ran
Swelling is ubiquitous for conventional hydrogels but is not favorable for many situations, especially underwater applications. In this study, an anti-swelling and mechanically robust polyacrylic acid (PAAc)/gelatin composite hydrogel is reported with a rapid gelation process (10 1 s) under mild conditions via the synergy of MXene-activated initiation and zirconium ion (Zr 4+ )-induced cross-linking, without the requirement of external energy input. The MXene is found efficient to activate the chain initiation, while the Zr 4+ is prone indispensable for facilitating the cross-linking of formed polymer chains. The resulting hydrogel exhibits integration of exceptional anti-swelling properties and high mechanical performance at room temperature, thanks to the dense hydrogen bonds between PAAc and gelatin chains that enable an upper critical solution temperature above room temperature. Also, desirable electrical conductivity emerges in the hydrogel due to the simultaneous contribution of MXene and Zr 4+ , allowing stable electrical signal output of the gel upon deformation underwater. As a demonstration, an underwater communicator by harnessing the gel as a sensing module is assembled, which is capable of wirelessly delivering messages to the decoder on the ground via Morse codes. This study provides an exemplary way for the rapid gelation of tough and anti-swelling hydrogels for durable underwater applications.
研究领域:
材料科学
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化学工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuwei Cai,Ben Niu,Xinyu Ma,Songhan Wan,Xianru He
To develop high strength, anti-swelling, and sustainable hydrogels, acrylonitrile copolymer hydrogels are prepared based on the structural characteristics of microphase separation and physical crosslinking of thermoplastic elastomers. The hydrogel can be recycled and reprocessed into any desired shape and can withstand the maximum tensile stress of about 23 MPa, the maximum fracture energy is as high as 7592 J/m 2 . The hydrogels exhibit strain hardening behavior at low strain. In addition, the high strength can be maintained stably for more than 60 days in an aqueous environment and the hydrogel has pH-induced shape memory property. The hydrogel can be further strengthened by the introduction of zinc ions, and its toughness and elongation at break are greatly improved, which is mainly based on the dynamic balance between free zinc ions and conjunct zinc ions in the gel. In addition, the introduction of zinc ions also greatly improves the electrical conductivity of the gel. The strain sensor prepared by this gel has high sensitivity, good linear response, and stability, and is expected to be a promising candidate material for flexible electronic products and strain sensors.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Haimen Lin,Yiheng Li,Rubin He,Wenzhen Zheng,Yipeng Lai,Yiting Xu,Birong Zeng,Conghui Yuan,Lizong Dai
Thin hydrogel films (THFs) with submillimeter thicknesses are promising for on-skin electronics due to their exceptional shape adaptability and interfacial adhesion. However, it remains challenging for THFs simultaneously achieving high transparency, conductivity, and mechanical robustness. Moreover, the fabrication of THFs is limited by the rapid dehydration and uncontrollable swelling of hydrogels. Herein, through the design of a crosslinker 3-cinnamamylphenylboric acid (RBA), a triple-crosslinking strategy is developed to fabricate large-area THFs. Anchoring RBA onto polyvinyl alcohol (PVA) chains followed by UV-crosslinking affords hydrogels (denoted as RBVA) comprising three crosslinks including dynamic boronate ester groups, [2 + 2] photocycloaddition of cinnamamide groups, and hydrophobic aggregation. RBVA THFs with thicknesses tunable from ≈ 50 to 200 µm exhibit light transmittance ≥90% at a wavelength of range 400–800 nm, toughness of 7.2–48.0 MJ m −3 , and conductivity up to 3.63 mS cm −1 . RBVA THFs maintain constant swelling ratios and mechanical properties during long time underwater soaking or cyclic drying-swelling treatment. These thin, transparent, conductive, strong, and underwater stable RBVA THFs can be processed into invisible electronic skin with highly stable underwater sensing performances. The crosslinking strategy may inspire the design of durable and underwater stable THFs, advancing their potential in flexible electronics and biomimetic materials.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-11
·
IF 3.9
Lu Pengpeng,Xu Jingyang,Liu Shuyan,Fu Lili,Wu Shengxian,Liu Ze,Hou Tu,Liu He,Huang Dongyan
The application of flexible hydrogel sensors in extreme environments, such as low temperatures, underwater, or significant mechanical deformations, poses considerable challenges. Here, we present a simple one-pot method to fabricate ultra-tough, swelling- and freezing-resistant conductive organohydrogels without external conductive and freeze-resistant fillers. During gelation, by-products (C 6 H 15 NHCl, KCl) provide both conductivity and antifreeze properties, thus eliminating compatibility issues and dispersion challenges associated with external fillers. The resulting gel exhibits super toughness, with tensile strength reaching 10.2 MPa and stretchability up to 800% in the dry state. Following covalent crosslinking, the gel demonstrates excellent anti-swelling properties, with a swelling ratio of only 15.4% after 24 h of water immersion, while maintaining a tensile strength of 5.8 MPa and an elongation of up to 1000%. When fabricated into flexible sensors, these gels display stable electrical responsiveness and desired Gauge Factor (0.58–2.25), effectively detecting limb movements. Furthermore, the gel’s superior resistance to freezing and swelling ensures reliable signal stability under both − 20 °C and underwater conditions. These combined properties render the conductive gel a promising candidate for flexible sensing components in robotic and bionic applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Hongli Zhang,Yiling Zheng,Hongwei Zhou,Shilin Zhu,Jie Yang
Two-dimensional (2D) nanomaterial-based membranes display attractive properties in molecular separation and transport, which holds their great promise for a host of applications. However, notorious swelling problem of 2D membranes result in unsatisfactory molecular/ions sieving performance, and the enhancement of structural stability for 2D membranes in aqueous solution is still challenging. Herein, we demonstrate how to efficiently stabilize the Ti 3 C 2 T x MXene laminar architecture by the insertion of flexible and hydrophilic carboxylated cellulose nanofibers (CNFs). The importing of CNFs not only acted as a bridge to combine the adjacent 2D Ti 3 C 2 T x sheets and enhance mechanical strength, but also assumed the role of pillar to fix the interlayer distance effectively and improve the anti-swelling properties of Ti 3 C 2 T x membrane. Moreover, the intercalation of nanocelluloses into the interlayer of delaminated Ti 3 C 2 T x is able to distinctly increase the interlayer spacing and create more open gaps for fast and selective molecular transport. When applied in antibiotics separative filtration process, the resultant membrane exhibits outperformed anti-swelling properties in water environment up to 76 h and simultaneously possesses satisfactorily high selectivity of antibiotics (∼99.0 % for azithromycin) with unprecedentedly high pure water permeance (∼26.0 L m −2 h −1 bar −1 ). Such 2D membranes can be easily fabricated by a facile and patternable vacuum-assisted filtration and nanocellulose induced self-assembly strategy, which holds great potential for their scalability that are applicable to many applications such as seawater desalination, industrial wastewater treatment and remediation of aquatic environment.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Xiaotong Xiang,Guoqi Chen,Kai Chen,Xiancai Jiang,Linxi Hou
Facile preparation of super tough hydrogels with low temperature tolerance and anti-swelling property is still a challenging task for researchers. Meanwhile, the vast majority of tough hydrogels were obtained though chemical crosslinking and complicated synthesis or processing method accompanying a large number of harmful chemical reagents. Herein, the super tough chitosan/poly(vinyl alcohol) (CS/PVA) hydrogels (the maximum compressive strength of 18.97 MPa at a strain of 80% and the maximum tensile strength of 4.02 MPa at a strain of 406.4%) were successfully prepared via a simple post-treatment method. CS/PVA hydrogels were firstly prepared by freezing-thawing process and then soaking in saturated sodium chloride aqueous solution. The resultant hydrogels possess excellent swelling resistance and low temperature tolerance. This work shows that the post-treatment of immersing in saline solution is a feasible way to prepare super tough hydrogels with low temperature tolerance and anti-swelling property. This also would enlarge the application areas of CS.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 141
·期 30
·e55701
·
IF 2.7
Chaojie Chen,Guoqing Cui,Yuanlong Li,Li Liu,Guangfeng Wu
Developing antiswelling hydrogel that retains their low modulus and has three-dimensional (3D) printability to application in the biomedical field is a current critical issue. Here, we synthesized 3D printing ink consist of poly(acrylic acid-acrylamide-allyloxypolyethyleneglycol) (P(AA-Am-APEG)) and nanosilica (SiO 2 ) by free radical polymerization, immersed the hydrogel precursor printed by ink in ferric chloride solution to prepare a low modulus, antiswelling, and conductive hydrogel. In the physical cross-linking network, the coordination interaction and hydrogen bonds contributed to excellent mechanical properties and nSiO 2 regulated rheological behavior of ink. Especially, P(AA-Am-APEG) molecular chain was a structure containing of APEG branch chain, which could endow antiswelling (the equilibrium swelling rate was only 7% in deionized water) and low modulus (Young's modulus was less than 100 kPa) to hydrogel. The tensile stress could still maintain 90% of the original value after soaking for 24 h. In addition, the existence of iron and chloride ions provided high sensitive deformation-dependent conductivity to hydrogel. Therefore, the strategy of controlling the swelling and modulus by branch chains would expand the application of hydrogel in biosensors and other fields.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Yan Gao,Yi Wang,Yuyin Dai,Qi Wang,Peng Xiang,Yinghua Li,Guanghui Gao
Anti-swelling hydrogels have been used as underwater sensors, underwater actuators and artificial biomimetic cartilage. In order to improve the anti-swelling property, most hydrogels introduce environment-unfriendly chemical crosslinkers or organic solvents into the polymer network to enhance the crosslinking density of the network, which limits their application in the body. Therefore, we settled a dense hydrogen-bond network by introducing hyperbranched amylopectin (Amy) into polyvinyl alcohol (PVA) to prepare a non-toxic, biocompatible, tough hydrogel sensor. In addition, the hydrogels exhibit significant anti-swelling performance in various liquid media (such as swelling rates = 3.55%, in seawater) and excellent mechanical properties due to strong intermolecular hydrogen bond between Amy and PVA as well as the salting-out effect induced by sodium chloride (NaCl). Moreover, the hydrogels show moderate sensitivity (GF = 4.96), rapid response, signal stability and negligible hysteresis, which can be used to detect a variety of physiological signals and human movements. More significantly, the hydrogels have excellent biocompatibility and potential application prospects in the implantable sensors and medical fields.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Shuhao Wang,Kaifeng Gu,Jian Wang,Yong Zhou,Congjie Gao
Preparation of novel swelling resistance membrane by interpenetrating an immiscible flexible polyisobutylene (PIB) polymer into a rigid polyamide (PA) network by interfacial polymerization. Due to the force interlocking of flexible PIB, polyamide network has high strength and excellent resistance to methanol. The PA layer was characterized by mechanical strength , attenuated total reflection fourier transforms infrared spectroscopy (ATR-FTIR), small angle X-ray scattering (SAXS), contact angle, field emission scanning electron microscope (FE-SEM) and atomic force microscope (AFM). RO membrane performances were evaluated based on small molecule alcohol (methanol and ethanol) solution of Safranin O. The results show that the flexible PIB interpenetrates well in the rigid polyamide network and improves mechanical strength and swelling resistance. With an increasing concentration of PIB from 0% to 0.30% in the organic phase during the fabrication, the mechanical strength of the PA layer becomes 2.8 times that of the original, and the rejection of Safranin O increased from 95.43% to 99.43%, and the permeability coefficient ( B s ) decreased from 5.22 to 0.47.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Biomaterials Science & Engineering
·
2023
·
IF 5.8
Jinni Luo,Huanxia Wang,Jinfei Wang,Yuan Chen,Chenglong Li,Kejun Zhong,Jie Xiang,Pengxiang Jia
Conductive hydrogels have been in huge demand in biomedical and wearable electronics. However, the application of traditional conductive hydrogels is largely limited due to their poor mechanical properties. Here, a conductive hydrogel with excellent mechanical strength and swelling resistance properties is prepared by ion cross-linking, directional freeze-drying, and rehydration. First, the acrylamide and acrylic acid are polymerized in the κ-carrageenan solution to form the hydrogel. Then, the obtained hydrogel is cross-linked with Fe3+ by soaking in ferric chloride solution. Finally, the ionic cross-linked hydrogels are reinforced by directional freeze-drying and rehydration. The resulting hydrogel has excellent tensile strength (5.67 MPa) and high toughness (7.63 MJ/m3). It is worth noting that the hydrogel also had excellent anti-swelling properties. Its mechanical strength and volume almost show no changes after soaking in deionized water for 40 days. In addition, the hydrogel exhibits good ionic conductivity (0.091 S/m), high sensitivity, and excellent stability when applied as a strain sensor. This work proposes a simple method to fabricate a conductive hydrogel with great mechanical properties and swelling resistance, which displays huge potential in varied fields.
研究领域:
生物医学工程
·
材料科学
·
可穿戴设备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）