Nano Energy
·
2026
·
IF 17.1
Yutong Li,Tianyi Han,Mingbo Zhao,Jie Han,Ruiqi Zhao,Zhi Xu,Wei Cao,Ming Ma,Chenhui Zhang,Jianbin Luo
Hydration lubrication provides a significant paradigm for reducing friction at rubbing interfaces, with widespread relevance in engineering and human health. Although the frictional energy dissipation behind hydration lubrication is largely attributed to the shear between hydration layers, the influence of ionic distribution within the confined hydration layer remains unclear. Here, we show that ionic distribution critically modulates the frictional behavior through controlling the shear plane. By systematically tuning the surface charging of sliding interfaces, continuous control was achieved over the friction coefficient—from a superlubricity state under negative charging to a high-friction state under positive charging. Surface characterization and numerical analyses confirm that the contact zone is flattened and the hydration layer remains nanometers thick during sliding, with the tuning process governed by physical interactions. Molecular dynamics simulations reveal that surface charging modulates the spatial distribution of hydrated ions in the confined hydration layer, leading to asymmetric ion compositions across the shear plane. This asymmetry reshapes the energy barrier encountered during sliding, thereby altering the friction behavior significantly. Our results further elucidate the energy dissipation mechanism of electrotunable hydration lubrication and establish a theoretical framework for understanding the macroscopic modulation of interfacial friction.
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Materials
·
2023
·Vol. 16
·期 20
·
IF 3.4
Ziyue Yan,Yaqing Jiang,Kangting Yin,Limeng Wang,Tinghong Pan
This paper investigated the combined effect of chemical activators and nano-SiO2on the hydration reaction and the microstructure of γ-C2S. The hydration reaction of γ-C2S slurry activated with chemical activators (NaHCO3, NaOH, K2CO3, and KOH at 1 mol/L) was enhanced by 1% nano-SiO2. The hydrate reaction rate was determined by isothermal calorimetry, and the hydrated samples were characterized by XRD, TGA/DTG, SEM-EDS, and29Si MAS/NMR. The results revealed a substantial enhancement in the hydration activity of γ-C2S due to the presence of the alkaline activator. Furthermore, nano-SiO2did not alter the composition of γ-C2S hydration products, instead providing nucleation sites for the growth of hydration products. Incorporating nano-SiO2promoted the formation of C-(R)-S-H gel with a low calcium-to-silica ratio and increased its polymerization levels, resulting in more favorable structures. Among all the activators used in this study, potassium salts had a better activation effect than sodium salts. After 28 days of curing, the degree of hydration reaction in the KC+Si group was 48% and about 37% for the NHC+Si group. Whereas, the KH+Si and NH+Si groups only reached approximately 20% after the same hydration duration.
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CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Jaures Syntyche Ndzila,Zhengmao Ye,Guojian Jing,Xiaolei Lu,Jiaming Wu,Jinpu Zhang,Shuxian Wang,Xin Cheng
Sr 4 Al 6 SO 16 is a kind of anhydrous sulfoaluminate that belongs to the sodalite family. In this paper, we demonstrate the effect of Fe 3+ ions addition on the hydration properties of two polymorphs of Sr 4 Al 6 SO 16 (namely pure orthorhombic and cubic). In solid-state reaction of orthorhombic Sr 4 Al 6 SO 16 , excessive 5 wt% SrSO 4 was used to compensate for the loss of sulfur. Results indicate that the hydration rate of cubic phase is faster than that of orthorhombic phase at early stage, but the heat release of the latter is more concentrated. The reason why the cubic phase has a faster earlier hydration kinetics may be due to the incorporation of Fe 3+ ions and the formation of SrFe 12 O 19 impurity phase, which introduce the defects in the structure, activate the crystal lattice , and increase the hydration activity. Both polymorphs react with water to form the reaction products first, and then no crystalline phase hydration product was precipitated after 72 h. In contrary to the XRD , amorphous AH 3 was clearly detected in TGA analysis in hydrated samples, probably due to poor crystallinity which cannot be detected by XRD. In addition, both polymorphs contain a lot of impurity phases, and their amounts are calculated using the Rietveld refinement method. Moreover, the addition of Fe 3+ ions is not only beneficial to adjust the cubic phase content, but also facilitates the relative particle growth. This work provides a useful platform for employing the Fe 3+ ions to regulate the hydration properties of Sr 4 Al 6 SO 16 .
研究领域:
材料科学
·
化学
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CONSTRUCTION AND BUILDING MATERIALS
·
2016
·
IF 2.421
Zhenhai Xu,Zonghui Zhou,Peng Du,Xin Cheng
In order to evaluate the influence of nano-silica on tricalcium silicate (C 3 S) hydration, hydration rate, Ca(OH) 2 content, quantification of C–S–H, pore size distribution and micrographs of hydration products were measured. Results revealed that with the increase content of nano-silica, the hydration of C 3 S is accelerated before hydration for 3 d but slows down in the later age (7 d, 28 d and 60 d). C–S–H content increases with the increase content of nano-silica. However, an obvious reduction in C–S–H increment occurs at 7 d, 28 d and 60 d. In addition, the hydration products morphology changes from rod-shape to dense matrix at 28 d after nano-silica modification, and the Ca/Si ratio of C–S–H gel decreases. Besides, the addition of 3 wt.% nano-silica can reduce the total porosity of C 3 S by 4.04% and optimize the pore structure. Furthermore, the density of paste increases by 4.22%, which finally leads to the more compact structure of hardened paste.
研究领域:
材料科学
·
土木工程
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JOURNAL OF MOLECULAR LIQUIDS
·
2016
·
IF 2.74
Yong Zhou,Danping Wu,Yinyan Gong,Zengsheng Ma,Yongli Huang,Xi Zhang,Chang Q Sun
We show phonon spectrometrically that the unprecedented H 2 Ö: ↔ :Ö:H – compression resolves the performance of the base solution networks with “:” being the electron lone pair of oxygen. At hydration, LiOH, NaOH, KOH molecules dissolve each into a :Ö:H – hydroxide and cations of Li + , Na + , and K + , respectively. The cations serve as charge centers to polarize the neighboring water molecules and raise the solution skin stress (or surface tension). The :Ö:H – tetrahedron adds, however, three lone pairs and one bonded H + proton to the solution matrix, turning the initially 2N lone pairs into 2N + 3 and the 2N bonded H + into 2N + 1 with an additional O 2– anion. This hydration process breaks the conservation of the 2N lone pairs and protons with two extra lone pairs that only can form a H 2 Ö: ↔ :Ö:H – super hydrogen bond (super-HB) with strong repulsivity. In addition to the H O bond of the :Ö:H – featured at 3610 cm − 1 , the internal H 2 Ö: ↔ :Ö:H – compression has an identical effect of mechanical compression, shortening the O:H nonbonds and stiffening their phonons from below 200 cm − 1 to the above. Meanwhile, compression lengthens the network H O bonds and softens their phonons from above 3150 cm − 1 to below. The network H O bonds elongation decreases their energy from ~ 4.0 to ~ 2.7 eV at hydration, which heats the solution as one often observes. The H 2 Ö: ↔ :Ö:H – super-HB compressor and the alkali cation polarizor form the keys to the base hydration networks and the properties.
研究领域:
物理化学
·
材料科学
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CONSTRUCTION AND BUILDING MATERIALS
·
2017
·
IF 3.169
Jinfeng Sun,Kai Xu,Chaoqi Shi,Jian Ma,Weifeng Li,Xiaodong Shen
TiO 2 @SiO 2 nanoparticles with a core/shell structure widely used in photocatalytic fields were used in this paper to improve the hydration properties of the Portland cement. To this end, the core/shell TiO 2 @SiO 2 nanoparticles were synthesized first and then characterized by a series of techniques including transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR) and X-ray photoelectron spectra (XPS). Second, the influence of the core/shell TiO 2 @SiO 2 nanoparticles on cement hydration was investigated and compared with nano-TiO 2 through isothermal calorimetry, XRD, thermo gravimetric/derivative thermo-gravimetric (TG/DTG) and mercury intrusion porosimetry (MIP) analyses. The results showed that an amorphous SiO 2 layer can be deposited uniformly on nano-TiO 2 particles by forming new Si O Ti chemical bonds at the interface between the SiO 2 coating layer and nano-TiO 2 particle surface. This uniform layer was conducive to decrease the aggregation of nano-TiO 2 effectively. Compared with nano-TiO 2 , the core/shell TiO 2 @SiO 2 nanoparticles exhibited better hydration properties in terms of accelerated cement hydration, higher degree of hydration and lower porosity, even though both particles modified cement hydration.
研究领域:
材料科学
·
土木工程
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CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2018
·Vol. 53
·期 6
·966-975
·
IF 0.36
Cao Cheng,Pu Xiaolin,Wang Gui,Huang Tao
The properties of conventional shale hydration inhibitors were studied using samples of Longmaxi shale. The inhibition was evaluated by the rolling recovery test, linear swelling rate, and clay interlayer spacing. The results indicate that K 2 SiO 3 inhibits clay hydration far better than other inorganic shale inhibitors while polyamine is superior to other organic shale inhibitors of clay hydration. Alkaline solution is more effective in suppressing shale dispersion. A neutral environment has little impact on this parameter. On the contrary, an acidic medium can even promote it. Most of the inhibitors are incapable of suppressing simultaneously clay dispersion and expansion. Therefore, they should be used in conjunction to suppress synergistically clay hydration, dispersion, and expansion.
研究领域:
地质学
·
化学工程
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Science Advances
·
2022
·Vol. 8
·期 5
·
IF 14.957
Yiting Lei,Yuping Wang,Jieliang Shen,Zhengwei Cai,Chen Zhao,Hong Chen,Xiaoji Luo,Ning Hu,Wenguo Cui,Wei Huang
Introducing hydration layers to hydrogel microspheres (HMs) by coating the surface with liposomes can effectively reduce friction. However, the lubrication can be inactivated when the surface coatings are damaged. To endow HMs with the ability to form self-renewable hydration layers and maintain cellular homeostasis, rapamycin-liposome–incorporating hyaluronic acid–based HMs (RAPA@Lipo@HMs) were created using microfluidic technology and photopolymerization processes. The RAPA@Lipo@HMs improve joint lubrication by using a smooth rolling mechanism and continuously exposing liposomes on the outer surface to form self-renewable hydration layers via frictional wear. In addition, the released autophagy activator (rapamycin)–loaded cationic liposomes can target negatively charged cartilage through electrostatic interactions and maintain cellular homeostasis by increasing autophagy. Furthermore, the in vivo data showed that the RAPA@Lipo@HMs can alleviate joint wear and delay the progression of osteoarthritis. The RAPA@Lipo@HMs can provide efficient lubrication and potentially alleviate friction-related diseases such as osteoarthritis.
研究领域:
生物医学工程
·
材料科学
·
骨科
·
药学
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Bingrong Li,Yaowu Wei,Conghua Peng,Hui Zhou,Shuai Li,Shizhen Wang
The influence of Fe 2 O 3 on the hydration kinetics of tricalcium aluminate (C 3 A) was studied in order to clarify the mechanism of improving hydration resistance of CaO by in-situ synthesized tricalcium aluminate. The Krstulovic-Dabic model was used to investigate the hydration processes of Fe 2 O 3 -C 3 A solid solution and calculate the corresponding kinetic parameters. The hydration products were analyzed by the X-ray diffraction and scanning electron microscope. The results indicated that the Krstulovic-Dabic model simulated the hydration processes of Fe 2 O 3 -C 3 A solid solution at different stages effectively. The hydraulic activity of Fe 2 O 3 -C 3 A solid solution decreased with the addition of Fe 2 O 3 . Reasonable amount of Fe 2 O 3 addition reduced the hydration rate in the initial stage of Fe 2 O 3 -C 3 A solid solution hydration, while the hydration rate of Fe 2 O 3 -C 3 A solid solution was increased with excessive amount Fe 2 O 3 . The hydration process was controlled by multiple mechanisms due to an incomplete layer of hydration products was formed on the surface.
研究领域:
材料科学
·
化学工程
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CONSTRUCTION AND BUILDING MATERIALS
·
2026
·
IF 8
Aofei Guo,Youqian Geng,Haowei Ma,Danying Gao,Hu Feng,Yunrui Zhang,Fangping Hao,Zhenyun Yu,Zhihui Sun
The low water-to-cement ratio cement-based materials represented by high-performance or ultra-high-performance concrete exhibit excellent mechanical and durability properties but suffer from poor flowability and insufficient and nonuniform hydration. Polyethylene glycol-grafted cellulose nanocrystal (PCNC) was synthesized by grafting polyethylene glycol (PEG) onto cellulose nanocrystal (CNC) and then was incorporated into cement paste to improve its flowability and hydration performance. A series of tests were conducted to analyze the flowability, compressive strength, and hydration behavior of cement paste with PCNC, with the hydration mechanism revealed. The results show that PCNC promotes more complete and uniform cement hydration through mechanisms including short-circuit diffusion, nucleation, and steric hindrance, resulting in improved flowability and compressive strength compared to pure and CNC-modified cement paste. The optimal PCNC dosage is 0.1 %, where the flowability and 28-day compressive strength increased by 10.73 % and 30.63 %, respectively. Finally, a mechanism model by which PCNC improves cement hydration was proposed.
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CRYSTAL GROWTH & DESIGN
·
2026
·Vol. 26
·期 15
·5829-5837
·
IF 3.6
Wei Yonghao,Liu Daiming,Zhang Guodong,Wang Fei
The dual encapsulation of natural gas via adsorption
and hydration
in prehumidified nanoporous materials provides a novel strategy for
its dense storage under milder conditions, but the encapsulation performance
is highly dependent on the material itself. To enhance the encapsulation
performance, ZIF-8 was functionalized with amination (−NH 2 ) and metal doping (Cu 2+ ), yielding two nanoporous
materials, ZIF-8-NH 2 and ZIF-8-NH 2 @Cu. The effects
of −NH 2 and Cu 2+ on the adsorption and
hydration encapsulation performance were evaluated, and their coupling
relationship with preadsorbed water was analyzed. The results demonstrate
that −NH 2 improves the adsorption encapsulation
performance of methane, increasing the adsorption rate at a low pressure
by 109.7%. In addition, −NH 2 also enhances the hydration
encapsulation efficiency and strengthens the hydration efficiency
of preadsorbed water. Consequently, the adsorption-hydration dual
encapsulation capacity of methane by ZIF-8-NH 2 is increased
by 30.12% compared to pure adsorption, effectively lowering the hydration
initiation pressure and increasing the gas storage density at low
pressure. However, the enhancement effect of −NH 2 on hydration efficiency is strongly dependent on the amount of preadsorbed
water; when the preadsorbed water content increases to R w = 1, the hydration-encapsulated methane
amount can be elevated by 368%. In contrast, the effects of Cu 2+ functionalization on methane adsorption and hydration encapsulation
are below expectations, and it even exhibits an antagonistic effect
with −NH 2 under specific conditions, reducing the
adsorption-hydration dual-encapsulation performance. These findings
can guide the preparation of high-performance nanoporous materials
for adsorption-hydration dual encapsulation, thereby promoting the
application of hydrate-based gas-storage technology.
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高影响因子
Nature Communications
·
2026
·
IF 18.1
Zeng Jingyi,Liu Qiao,Yang Jin,Zhang Zhongyong,Zou Huangjie,Su Ying,Wang Yingbin,Li Yubo,Li Neng,He Xingyang
Calcium silicate hydrate (C-S-H) and calcium hydroxide (CH, portlandite) are the dominant hydration products of Portland cement. However, the anisotropic layered CH and uncoordinated nucleation of C-S-H and CH severely restrict the macroscopic performance of cementitious materials. Here, we report a hydrogen-bond-regulated proton transfer strategy to mechanochemically synthesize a positively charged, isotropic disordered CH precursor (CHP_H + ). This precursor serves as a growth-accelerating nucleus to trigger dual heterogeneous nucleation of CH and C-S-H, in situ forming a CH@C-S-H composite. Free energy calculations reveal that hydroxyl vacancies on CH surfaces drive spontaneous water adsorption to generate ≡Ca−OH 2 + sites, which stabilize silicate clusters and promote composite growth. The resulting cementitious material shows accelerated hydration kinetics, higher hydration heat release, and greatly improved elastic modulus and compressive strength, delivering a 5.4-fold improvement in 12 h strength over the control. This work provides an atomic-scale design principle for advanced cementitious materials by reprogramming the nucleation and growth pathways of hydration products via protonation regulation.
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