MATERIALS & DESIGN
·
2018
·
IF 4.525
Yang Liu,Xu Wang,Yichun Zhang,Cheng Zhang,Longbo Luo,Wenchuan Lai,Yulong Li,Xiangyang Liu
The superhydrophilic membranes always face the problem of easy loss of water favoring property due to the easy adsorption of organic contaminants in air during storage. Here we present a material with durable superhydrophilicity and self-cleaning property through fluorination of commercial stainless steel mesh , and demonstrate the positive effect of crystal water on the maintainment of superhydrophilicity. Different from most reported superhydrophilic materials, fluorinated stainless steel mesh (F-mesh) can hydrate water in the form of crystal water and nanoparticles can be in-situ generated onto F-mesh wall upon hydration action. The crystal water can protect the surface from being contaminated by organic contaminants in air and is beneficial to the maintainment of superhydrophilicity up to at least 229 days. The long-lasting superhydrophilicity promote F-mesh to be applied in recyclable oil/water separation to solve the serious pollution caused by oily wastewater. The strong hydratability also endows fluorinated stainless steel plate with self-cleaning property even when they are already wetted by oil. The idea of crystal water may offer a general guideline for other superhydrophilic materials to keep superhydrophilicity and F-mesh shows great potential in the fields of biology and environment.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Yanchun Shen,Ximing Qiao,Ziyu Song,Shaobo Zhong,Dongshan Wei
Citrate salts are widely used as food additives and medicines for health and treatment. Accurate and fast detection of citrate salts is most important in food industry and medicine health. In this work, terahertz (THz) time-domain spectroscopy was used to detect and analyze different citrate salts and differentiate their crystalline hydrates. Effects of the crystalline state, the crystallization water and the metal cation on the THz spectra of citrate salts were investigated. Results indicate the crystalline states of the citrate salt samples strongly influence their THz featuring absorption peaks and citrate salts with crystallization water have larger absorption coefficients at the same frequency and higher possibility of existing featuring absorption peaks in comparison with citrate salts without crystallization water. Size of the metal cation also influences the THz absorption peak of the citrate salt and a small cation radius results in a large absorption peak frequency. This work illustrates the terahertz spectroscopy can be well used as a new technique to detect the citrate salts and differentiate their crystalline hydrates.
研究领域:
食品科学
·
药学
·
光谱学
✓ 已验证
DOI
PubMed
高影响因子
FIRE SAFETY JOURNAL
·
2025
·
IF 3.3
Lijing Wang,Shaowen Du,Sai Yao,Yibo Guo,Qi Yang,Haijun Zhang
Struvite (MgNH 4 PO 4 ·6H 2 O) exhibits strong fire-extinguishing properties due to its chemical structure, which resembles that of the widely used ammonium dihydrogen phosphate (ADP). The crystalline water within struvite contributes to its enhanced cooling effect. However, its relatively low pyrolysis temperature range (60 °C–300 °C) restricts its efficiency in high-temperature fires (e.g., 600 °C), where pure struvite struggles to penetrate the flame base. To overcome this limitation, a composite powder was developed by coating struvite with ammonium polyphosphate (APP), a compound known for its high thermal stability. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and TGA-IR were used to investigate the fire-extinguishing mechanism. Results showed that the incorporation of APP extended the thermal decomposition range of struvite, with the 15 wt% APP composite demonstrating optimal performance. This composite exhibited a multifaceted fire-extinguishing action: releasing water vapor for cooling, ammonia for flame suppression, and solid residues that formed a protective layer to isolate the flame from the fuel. Consequently, the composite powder demonstrated superior fire-extinguishing performance, outperforming traditional ADP powder in oil pool fire tests, demonstrating its potential for practical fire suppression applications.
研究领域:
材料科学
·
消防工程
·
无机化学
·
热力学
·
安全工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huaiqi Hu,Wei Zhang,Junyin Cheng,Sheng Zhang,Tao Chen,Tonghua Zhang,Lei Chen
The advent of smart terminals has spurred interest in wearable epidermal electronic components composed of conductive hydrogels, with promising advancements in the real-time health monitoring, clinical diagnostics, medical care, and human–machine interaction sensing. However, despite their high sensitivity, conventional porous hydrogel materials often encounter challenges, such as non-uniform pore structures, inadequate energy dissipation mechanisms, structural instability, and poor fatigue resistance. Drawing inspiration from biomineralization and the Ostwald Ripening (OR) theory, this study rapidly synthesized an electron–ion synergistic P(AM-CO-AA)-PDMM crystalline hydrogel with a multistage pore structure via a one-step method (within 15 min). Additionally, the polydopamine-modified MXene (PDMM) enhanced the adhesion and antioxidant capabilities of the hydrogel. Upon subjecting amorphous calcium carbonate (ACC) to a high-temperature acidic copolymer network, it underwent CO 2 gas release, resulting in a porous structure and transformation into stable calcite crystals uniformly dispersed within the hydrogel. The combination of rigid calcite crystals and a flexible hydrogel network confined network migration under slight strain and dissipated energy under larger strain. The resulting composite hydrogel demonstrated exceptional mechanical compressibility (compression hysteresis < 1.4 % over 7000 cycles), high sensitivity (gauge factor up to 58.64), good conductivity (4 S/m), impressive toughness (28 MJ/m 3 ), a wide detection range (tensile strain: 1 %-400 %, compression: 0–43 kPa), and rapid response recovery time (500 and 400 ms). Furthermore, it effectively detects various human physiological activities, serves as a dependable flexible electrode for capturing and distinguishing the EMG and ECG signals, and can be employed in the single-electrode triboelectric nanogenerator (SE-TENG) for energy harvesting, demonstrating its potential in self-powered flexible sensing devices.
研究领域:
材料科学
·
生物医学工程
·
智能材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 14
·2108267
·
IF 18.808
Ang Gao,Jiannian Xia,Min Li,Xia Lu,Feng Wang,Ru Yang
Crystal water mediated ion hydration and transport is a fundamental physicochemical process in a wide range of applications and natural processes, such as crystal water containing battery materials. In this context, K-Birnessite with interlaminar H 2 O (K 0.21 MnO 2 ⋅0.31H 2 O) is reported for nonaqueous potassium-ion storage with enhanced capacity and rate performance. It is clarified that the water–solid interface plays an important role in building and stabilizing the K-Birnessite layered structure and facilitating the K + diffusion for the K-ion battery system. In addition to the enlarged ionic channel dimensions and effective shielding of the electrostatic interaction with K + , the concerted diffusion of K + /H 2 O with the rotation of H 2 O molecules is further revealed to account for the quite low activation energies by first-principles simulations. Moreover, the interlayer H 2 O exerts on the electronic structures, and thus on the electrochemical voltage to result in the competition between the split of crystal field (“∇ JT ”) and the electronic superexchange interaction (“O w -K-O”) in the K-Birnessite structure. The results provide new insights into hydrated ion kinetics and open an exciting direction for battery material design.
研究领域:
材料科学
·
电化学
·
储能
·
计算材料科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·
IF 4
Yi Shui,Zhengli Liang,Zhenhua Li,Jiahao Wan,Lehui Liu,Xingxing Jiang,Zheshuai Lin,Hongming Liu
Exploring feasible tactics to induce the formation of non-centrosymmetric (NCS) structures, especially from centrosymmetric (CS) structures, is essential for the development of nonlinear optical crystals with more potential. An NCS alkali metal-containing molybdenum iodate hydrate, namely, NaMoO3(IO3)(H2O), was designed based on the CS matrix NaMoO3(IO3) via introducing a water molecule into the structure. The introduction of one crystalline water molecule results in the rearrangement of Λ-shaped cis-[MoO4(IO3)2] units, and the proper array of the cis-[MoO4(IO3)2] units in NaMoO3(IO3)(H2O) results in its strong SHG response of 4.6 × KH2PO4. In addition, NaMoO3(IO3)(H2O) exhibits a wider optical bandgap of 3.44 eV and a larger birefringence of 0.231 than its matrix. Furthermore, the framework of NaMoO3(IO3)(H2O) is highly similar to that of α-KMoO3(IO3), with water molecules assisting Na+ cations in occupying the position of K+. However, due to the extra hydrogen bond of water molecules, the [MoO3(IO3)]∞ layers in NaMoO3(IO3)(H2O) retain a parallel-stacking arrangement, different from the antiparallel arrangement of layers in α-KMoO3(IO3) with a centric structure. This study confirms the feasibility of applying a water molecule to adjust the orientation of basic building block units to assemble an NCS structure based on CS crystals.
研究领域:
材料科学
·
光学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 3
·e53319
·
IF 3.057
Xi Chen,Shuaiyin Wang,Bowen Yu,Jihui Li,Lingzhi Liu,Ying Lu,Wenyuan Xu,Yongxin Liu
A chemical shape-memory hydrogel containing crystalline structure is prepared via micellar copolymerization of hydrophilic monomer acrylamide (AM) and hydrophobic monomer octadecyl acrylate (C18) in a sodium dodecyl sulfate (SDS) solution. The influence of SDS on the shape-memory behavior of hydrogel investigated by differential scanning calorimetry (DSC) and Temperature-dependent X-ray indicate that the melting and crystallization peaks derived from the thermal properties of C18 units is different from peaks corresponding to the pure SDS. In addition, the microstructure evolution information of hydrogels dose not change upon heating process, regardless of the presence or absence of SDS. Therefore, only the hydrophobic associations formed by C18 blocks play a decisive role in the shape memory function of hydrogel system. The difference between the transition process (from temporary shape to permanent shape) of hydrogel with and without SDS at different temperature is because that the hydrophobic region of side chain crystallization of SDS-free hydrogel may escape the restriction of SDS and become more sensitive to temperature, they can preferentially return to their initial shape under the same time and temperature than SDS-containing gels. Whether SDS exists only affect the speed of shape memory behavior, but not the microstructure evolution of hydrogel system.
研究领域:
材料科学
·
高分子化学
·
软物质物理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）