CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Haidi Wu,Yongchuan Wu,Jun Yan,Wei Xiao,Yuqing Wang,Hechuan Zhang,Xuewu Huang,Huaiguo Xue,Ling Wang,Longcheng Tang,Yiuwing Mai,Jiefeng Gao
Hydrogels have been rapidly developed recently owing to their excellent flexibility and biocompatibility and exhibit promising applications in biomaterials, flexible electronics, etc. However, when compared to the biological materials, many hydrogels with similarly high water contents display relatively low mechanical properties and it is difficult to achieve a balance between strength, toughness and fatigue resistance simultaneously. Herein, a facile solvent exchange assisted Hofmeister effect strategy is proposed to prepare strong and fatigue-resistant hydrogels with widely tunable water content. The polymer solution is first transformed to an organogel by exchange of the good solvent (dimethyl sulfoxide) to a poor solvent (alcohol), and then the organogel converts to hydrogel after the second step exchange of the alcohol to a saline solution. The alcohol induced gelation assisted salting-out promote the conformation adjustment of macromolecular chain, which endow the hydrogels with excellent comprehensive mechanical properties, with the extraordinary high strength of 26.4 ± 1.6 MPa, superior stretchability of 1252.3 ± 116 %, ultra-high fracture energy of 139.45 ± 37.3 KJ/m 2 , large fatigue threshold of 1837.9 ± 63.4 J/m 2 (water content of 20.2 wt%) as well as ionic conductivity of 0.34 S/m. Therefore, this work put forward a viable design method to fabricate outstanding performance soft materials for applications in load-bearing material and strain sensor fields.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Chuyao Chen,Cong Huang,Jiamin Liu,Jia Tao,Yuying Chen,Kan Deng,Yikai Xu,Bingquan Lin,Peng Zhao
The imaging resolution of magnetic resonance imaging (MRI) is influenced by many factors. The development of more effective MRI contrast agents (CAs) is significant for early tumor detection and radical treatment, albeit challenging. In this work, the Hofmeister effect of Fe2O3 nanoparticles within the tumor microenvironment was confirmed for the first time. Based on this discovery, we designed a nanocomposite (FePN) by loading Fe2O3 nanoparticles on black phosphorus nanosheets. After reacting with glutathione, the FePN will undergo two stages in the tumor microenvironment, resulting in the robust enhancement of r1 and r2 based on the Hofmeister effect in the commonly used magnetic field (3.0 T). The glutathione-activated MRI signal of FePN was higher than most of the activatable MRI CAs, enabling a more robust visualization of tumors. Furthermore, benefiting from the long circulation time of FePN in the blood and retention time in tumors, the synergistic therapy of FePN exhibited an outstanding inhibition toward tumors. The FePN with good biosafety and biocompatibility will not only pave a new way for designing a common magnetic field-tailored T1–T2 dual-mode MRI CA but also offer a novel pattern for the accurate clinical diagnosis and therapy of tumors.
研究领域:
医学影像学
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
PubMed
高影响因子
IRANIAN POLYMER JOURNAL
·
2024
·
IF 2.4
Ma Honghui,Deng Yingxue,Lin Yubo,Zhang Yu,Zhou Zhengxiong,Yu Haoan,Jiang Xiancai
Hofmeister effect has been used to prepare highly tough and conductive hydrogel. However, it usually needs the complex steps of post-treatment of a pre-formed weak hydrogel by soaking in salt solution. Herein, strong and tough silk fibroin/poly(vinyl alcohol) (SF/PVA) ionic conductive hydrogel was prepared by a simple one-pot method by direct introduction of sodium citrate (Na 3 Cit) into SF/PVA solution. It was found that Na 3 Cit could not be directly introduced into SF/PVA solution due to its salting-out effect to prepare tough hydrogel. Fortunately, the salting-out effect of Na 3 Cit could be weakened with the presence of calcium chloride (CaCl 2 ) and glycerol in SF/PVA solution. Finally, the strong and tough SF/PVA hydrogel was obtained by the one-time freezing/thawing process of SF/PVA/CaCl 2 /Na 3 Cit/glycerol solution. The tough SF/PVA/CaCl 2 /Na 3 Cit/glycerol organohydrogel with the tensile strength of 0.33 MPa and elongation-at-break of 540% were obtained. The SF/PVA/CaCl 2 /Na 3 Cit/glycerol organohydrogel with the excellent mechanical properties and ionic conductivity was used as the strain sensor. The SF/PVA/CaCl 2 /Na 3 Cit/glycerol organohydrogel sensor could detect various human motions with high sensitivity (GF = 6.87). The SF/PVA/CaCl 2 /Na 3 Cit/glycerol organo hydrogel strain sensor could generate reliable and reproducible electrical signals in response to various mechanical stimuli. We intend to present a simple and effective method to prepare high performance ionic hydrogel by Hofmeister effect. Graphical Abstract
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
Materials Today Chemistry
·
2024
·
IF 6.7
Gege Shi,Jiuming Xiong,Weijun Wu,Zhiyong Guo,Sui Wang,Jie Mao
Hydrogels have received much attention in the field of flexible electronics as materials with flexibility and multifunctionality. The mechanical strength of conventional hydrogels is usually difficult to meet the requirements of practical applications in electronic devices. How to fabricate a high-strength hydrogel should remain a challenge. Here, a strategy to enhance the mechanical properties of conductive hydrogels based on the Hofmeister effect is reported. The mechanical properties of hydrogels were enhanced by increasing the polymer chain density, enhancing the hydrophobicity and increasing the crystallinity, the high-strength and high-toughness polyvinyl alcohol/carbon nanotubes/polyethyleneimine (PVA/MWCNTs/PEI) conductive hydrogel was successfully produced. The ultimate stress of the hydrogel was as high as 3.5–6.3 MPa, the elongation at break was between 500 and 1200 %, and the toughness was up to 23.62 MJ/m 3 . The conductivity of high-strength, high-toughness hydrogel is 0.05–0.45 S/m. Hydrogel was manufactured into a single-electrode friction nanogenerator (TENG), and it can easily light up to 100 LEDs. Therefore, this high-strength and high-toughness conductive hydrogel has great potential for TENG applications, offering the possibility of extending the working life of TENG in harsh environments.
研究领域:
材料科学
·
柔性电子
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纳米技术
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2022
·Vol. 10
·期 44
·9258-9265
·
IF 7.571
Chenglong Dong,Mengfan Lu,Hailong Fan,Zhaoxia Jin
Developing advanced soft machines and tissue engineering for load-bearing cartilage or tendons requires tough hydrogels. However, the construction of double or triple crosslinked networks for these tough hydrogels, i.e., a strong network crosslinked by covalent bonds and one or two sacrificial networks built by hydrogen bonds or coordinate bonds, generally asks for multiple steps. It remains a challenge to develop hydrogels with a combination of excellent toughness and a high content of water through the time-saving one-pot process. This study demonstrates that this puzzle could be solved through engineering zirconium(IV)–amide coordinate bonds. To be specific, the combination of strong Zr(IV)–O and moderate Zr(IV)–N coordinate bonds in Zr-polyacrylamide (Zr-PAAm) hydrogels has the advantage that they are usually generated through multiple cross-linked networks. Compared to chemical crosslinked PAAm hydrogels, the highly transparent Zr-PAAm hydrogels crosslinked by Zr(NO3)4 displayed a 26-times increase in fracture stress, 4-times in fracture strain, 6-times in elastic modulus, and over 250-times in toughness. Besides, the mechanical properties of Zr-PAAm hydrogels could be altered over a wide range via changing the anion species, showing a dependence on the Hofmeister effect. The co-existence of Zr(IV)–N and Zr(IV)–O has been confirmed through XPS and FTIR characterizations. In particular, the effect of Zr(IV)–N in Zr–PAAm hydrogels has been verified by comparing the property changes of Zr-PAAm hydrogels before and after swelling in water, in which the Zr(IV)–N in the as-prepared hydrogels was replaced by Zr(IV)–O in the swollen gels. With ultra-stretchability and high transparency, the colorless Zr-PAAm hydrogels displayed rich interference colors under stretching, which brought great potential in anti-counterfeiting materials.
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
Energy Technology
·
2022
·Vol. 10
·期 12
·2200897
·
IF 4.149
Xue Wang,Zhihao Xing,Chao Yang,Yusheng Qin
The all-in-one flexible supercapacitor holds great promise for wearable electronics due to its stable electrochemical performance under continuous strain. However, it is a challenge to achieve good mechanical strength, self-healing performance, and high energy density for their potential applications. For this purpose, a stretchable and healable all-in-one supercapacitor consisting of gelatin hydrogel electrolytes and polypyrrole electrodes is constructed. The gelatin hydrogel is obtained by the hydrolysis of leather waste shavings and then physically cross-linked by simply soaking in a sodium sulfate solution. Benefiting from the Hofmeister series, the kosmotropic sodium sulfate ions can significantly enhance the hydrophobic interactions and chain bundling, thus greatly improving the mechanical strength of gelatin hydrogel. As a result, the as-prepared all-in-one supercapacitor exhibits an area-specific capacitance of 219.0 mF cm −2 , a high energy density of 19.46 μWh cm −2 , and long cycling life. In particular, the all-in-one supercapacitor can be deformed under varied stress–strain via decross-linking and dissociation, simultaneously delivers reliable self-healing capability. This work presents a simple and green technology to prepare an all-in-one supercapacitor, which motivates the development of biomass wastes toward high-performance electronics.
研究领域:
材料科学
·
能源技术
·
生物资源利用
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rui Li,Zhenyu Xu,Long Li,Junjie Wei,Wenqin Wang,Zejun Yan,Tao Chen
Hydrogel based triboelectric nanogenerators (H-TENGs) are deemed as one of most promising flexible energy harvesting and self-powered systems due to its multifunctionality, but the poor mechanical properties of hydrogel electrode bring a major risk of shortening the service life of H-TENGs in case of huge physical impact. Herein, a durable conductive hydrogel electrode with breakage-resistant capacity is developed utilizing the Hofmeister effect on starch polymers through solvent-exchange strategy. Owing to bundled starch chains within hydrogel, the breakage-resistant hydrogel electrode possesses excellent mechanical reliability, including outstanding modulus, fracture energy, anti-puncture capacity and long-term stability. Furthermore, the reliable hydrogel electrode endows triboelectric nanogenerator with good electrical output performances and superb damage immunity, prolonging its service life under accidental physical impact. More significantly, this fabricated triboelectric nanogenerator shows great potential in high-impact application. This investigation offers a versatile and effective way to design next generation hydrogel-based triboelectric nanogenerator with superior damage immunity and long-service life.
研究领域:
材料科学
·
能源技术
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Murong Xi,Zhenjie Liu,Rui Sheng,Jiafeng Zhu,Yong Guo,Juan Ding,Xingchao Wang,Yue Zhang,Lei Wang,Zhipeng Sun,Wenjun Zhang,Jiulin Wang,Yudai Huang
Dissolutions of the polymer in the chaotropic salts follow Hofmeister effect, and the aggregate of salts and solvents shows new influence of the Hofmeister effect. Here, we reveal the aggregation of ion–solvent in chaotropic salt solution catalyzes the formation of the exposed Lewis acid-base center and realizes the dissolution of polyamide (PA) macromolecules. The relationship between Hofmeister effect, aggregate chemistry and Lewis acid-base chemistry is examined from new perspective. And then, a new solvent system and phase conversion process are designed for polyamides. Finally, the applications of PA in ZIBs as coating layer and binder are realized. As an electrode coating, it can effectively inhibit hydrogen evolution, corrosion and dendrite problems and improve the cycle life (cycle over 1500 h at 0.5 mA cm −2 ). As a binder, the active material adhesion on current collector, uniformity and wettability of the electrode are improved. The assembled pouch-cell with PANI cathode shows a capacity of 150 mAh g −1 after 120 cycles. This work reveals the secret of controlled phase transformation of polyamide in saline solution from a new perspective. And this phase conversion method is simpler, greener and more environmentally friendly, which greatly accelerates the application of polyamide in the field of membrane science and binder science.
研究领域:
高分子化学
·
电化学
·
材料科学
·
能源存储
·
膜科学
·
粘结剂科学
·
物理化学
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Ying Chen,Jiaxin Duan,Jiahui Yu,Dezhan Ye,Yanhu Zhan,Xiancai Jiang
Solar-driven interfacial evaporation represents a promising strategy for desalination, but improving evaporation performance in seawater is challenging. Reducing the evaporative enthalpy is an effective method to solve this issue. Herein, a highly hydratable spongy hydrogel (SPC) obtained based on the Hofmeister effect is reported. The SPC evaporator in seawater demonstrated a reduced evaporation enthalpy of 1537 J/g, achieving an impressive evaporation rate of 4.01 kg m −2 h −1 , which is higher than that in pure water (3.82 kg m −2 h −1 ). Further research found that, benefiting from the Hofmeister effect, Cl − ions in brine inhibited the hydrogel crystallinity, increased the IW content, significantly reduced the evaporation enthalpy, and thus accelerated the evaporation rat in seawater. Furthermore, the hierarchically porous structure of the spongy hydrogel facilitates rapid water supply and mass transfer, promoting the diffusion/return of salt ions and preventing salt crystal accumulation. The long-term desalination test demonstrated that the SPC evaporator possesses strong salt resistance. This work provides new insights for designing cost-effective and salinity-resistant solar evaporators to address the challenges posed by water crises.
研究领域:
材料科学
·
环境工程
·
能源技术
·
化学工程
·
应用物理
✓ 已验证
DOI
高影响因子
Gels
·
2025
·Vol. 11
·期 9
·694
·
IF 5.3
Wei Sang,Xu Yang,Hui Li,Xiaoxu Liang,Hongyao Ding
Conductive hydrogels are attractive for flexible electronics; however, achieving high mechanical strength and conductivity simultaneously remains challenging. Herein, we present a facile strategy to fabricate a tough and conductive hydrogel by immersing a physically crosslinked gelatin/glucose hydrogel in an aqueous sodium citrate. The introduction of sodium citrate induced multiple physical interactions via the Hofmeister effect, which synergistically reinforced the hydrogel network. The resulting hydrogel exhibited excellent mechanical properties, with a fracture strength of 2.7 MPa, a fracture strain of 932%, and a toughness of 9.5 MJ/m3. Moreover, the incorporation of free ions imparted excellent ionic conductivity of 0.97 S/m. A resistive strain sensor based on this hydrogel showed a linear and sensitive response over a wide strain range and stable performance under repeated loading–unloading cycles. These features enabled accurate and reliable monitoring of various human movements. This work offers an effective strategy for designing hydrogels with both high strength and conductivity for flexible and wearable electronics.
研究领域:
材料科学
·
柔性电子学
·
高分子科学
·
传感器技术
·
生物医学工程
✓ 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）