CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Yu Zhang,Lei Zhang,Chang Chen,Hao-Peng Zeng,Xiao-Sen Li,Bo Yang
The equilibrium and kinetic of hydrate in sediments can be affected by the presence of external components like bentonite with a relatively large surface area. To investigate the hydrate formation and decomposition behaviors in bentonite clay, the experiments of methane hydrate formation and decomposition using the multi-step decomposition method in bentonite with different water contents of 20%, 40% and 60% (mass) were carried out. The contents of bound, capillary and gravity water in bentonite clay and their roles during hydrate formation and decomposition were analyzed. In bentonite with water content of 20% (mass), the hydrate formation rate keeps fast during the whole formation process, and the final gas consumption under different initial formation pressures is similar. In bentonite with the water contents of 40% and 60% (mass), the hydrate formation rate declines significantly at the later stage of the hydrate formation. The final gas consumption of bentonite with the water contents of 40% and 60% (mass) is significantly higher than that with the water content of 20% (mass). During the decomposition process, the stable pressure increases with the decrease of the water content. Hydrate mainly forms in free water in bentonite clay. In bentonite clay with the water contents of 20% and 40% (mass), the hydrate forms in capillary water. In bentonite clay with the water content of 60% (mass), the hydrate forms both in capillary water and gravity water. The bound water of dry bentonite clay is about 3.93% (mass) and the content of capillary water ranges from 42.37% to 48.21% (mass) of the dry bentonite clay.
研究领域:
地质学
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化学工程
✓ 已验证
DOI
高影响因子
Materials Horizons
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2025
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IF 10.7
Maosong Tian,Junbo Chen,Jingfu Tian,Zhihao Liang,Yuanpeng Xie
Natural wood has garnered significant interest in the field of solar steam generation (SSG), due to its merits of widespread availability, hydrophilicity, and inherent porous structure. However, the limited capillary water content and high evaporation enthalpy of wood hinder the evaporation rates of wood-based SSG. In this study, a sulfonated porous wood with high capillary water content and small evaporation enthalpy was developed for efficient solar evaporation. The relatively hydrophobic lignin and hemicellulose were initially removed to enhance capillary effects, achieving a water absorption rate of 5.2 g g−1. Subsequently, sulfonic acid groups were grafted onto the wood surface to weaken the hydrogen bond interaction between water molecules, and thereby reducing the evaporation enthalpy to 1197 J g−1. Molecular dynamics simulations indicate that the sulfonated wood surface contains abundant hydrogen bonding sites, which thermodynamically enhance the escape behavior of water molecules. As a result, the all-biomass SSG demonstrated an evaporation rate of up to 3.4 kg m−2 h−1 when combined with bamboo carbon black as a photothermal material, representing the highest evaporation rate for wood-based solar evaporation to date. This work provides an effective strategy for efficient wood-based solar steam generation.
研究领域:
材料科学
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Heliyon
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2024
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IF 3.4
Jinyue Zheng,Yvxin Ding,Lingling Zhao,Zhichao Xiao,Jun-Hua Shao
The purpose of this experiment was to explore the influence of different cooking temperatures on the deterioration characteristics of pork batter gel by using proteomics, gel electrophoresis, size and chemical bond of aggregates. The results showed that the protein molecules of the pork batter gel was degraded during heating cooking and the protein aggregates were composed of many degraded protein fragments; compared with the control group 75 °C (0 min), the significant degradation of cytoskeleton showed at 110 °C (30 min) and 121 °C (30 min) and the significant degradation of myosin complexonly appeared at 121 °C (30 min). As the heating temperature points increased, compared with the control group 75 °C (0 min), the different temperatures could promote the separation of metal ions with proteins especially at 110 °C (30 min) and 121 °C (30 min), which could ultimately influence quality of pork batter gel by the size of particle. As the increase of heating temperature points, the recombination of aggregates composed of different proteins was not conducive to the retention of capillary water, which reduced the texture of pork batter gel. This research provided theoretical support for improving the process property of the meat products.
研究领域:
食品科学
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蛋白质组学
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肉类加工
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Cong Wu,Dongshuai Hou,Bing Yin,Binmeng Chen,Zongjin Li
The polystyrene acrylate (PSA) coating and polysiloxane coatings can protect the durability of cementitious materials through surface barrier and internal hydrophobicity, respectively. However, their composite coating presents a challenge due to the significant difference in molecular structure, molecular polarity, and thermodynamic properties, leading to poor interfacial compatibility. This paper presents a novel multi-component interpenetrating polymer network (IPN) based on the ‘host - guest molecular structure’ theory, which consists of cross-linked PSA as the main molecule and polysiloxane as the guest molecule, interfacially regulated by functionalized nanoparticles. The IPN composite coatings with high microphase separation properties enable dual synergistic protection of the durability of cementitious materials. The IPN emulsions synthesized increased the proportion of harmless pores within the cementitious materials to over 88.3 %. Additionally, they decreased the static capillary water absorption of concrete by over 94.06 % and effectively inhibited the formation of corrosion products, including Friedel's salt, gypsum, ettringite, and CaCO 3 . The adhesion strength of the IPN coating was also improved to 2.7 MPa, and its thermal expansion coefficient was limited to within 5.5 × 10 −5 /K. Moreover, the modified IPN coating contains numerous strong hydrogen bonds and interwoven molecular networks. These features enable stable deformation recovery and surface shielding of cracked concrete.
研究领域:
材料科学
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高分子化学
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土木工程
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涂料与表面处理
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Cong Wu,Mengmeng Li,Dongshuai Hou,Bing Yin,Binmeng Chen,Zongjin Li
Cementitious materials in durability can be improved by membrane protection and osmotic hydrophobicity with Polystyrene acrylate (PSA) and polysiloxane (PSE), respectively. However, due to the significant differences in molecular structure, the fabrication of PSA- PSE composite coatings with multiple protective effects have been a thorny issue. In order to enhance the interfacial binding effect between PSA and PSE, and to solve the problem of poor stability caused by poor compatibility, this paper innovatively utilizes the topological network structure growth regulation mechanism of secondary surface functional nanoparticles to prepare PSA-PSE copolymer emulsions with highly crosslinked star and dendrimer structures, respectively, with branch grafting ratios of over 94% and semi-crystallinity of over 5.39%. As a consequence of surface treatment, numerous dense calcium-silicate crystals with low Ca/Si ratios are deposited inside the cementitious materials, decreasing the volume proportion of harmful micropores and connected capillary pores to below 10.4%. The modified copolymer coatings decrease the capillary water absorption and static permeability of concrete by over 55%, and lead to nearly 80% reduction in carbonation depth of cement hydrates, and have an adhesion strength of up to 3.3 MPa. Particularly, the proportion of ordered hydrogen bond within the composite coating reached 45.1%, demonstrating excellent reversible elastic deformation recovery performance.
研究领域:
材料科学
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土木工程
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高分子化学
✓ 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）