DESALINATION
·
2024
·
IF 8.3
Fan-xin Kong,Shi-yuan Zhang,Ding-wen Zhang,Ping Xia,Jin-fu Chen
Construction of covalent organic frameworks (COF) membranes on the polymeric substrate was challenging by interfacial polymerization (IP) process. In this study, COF-LZU1 membranes were fabricated by IP on the preheated PSf substrates to investigate the influence of substrate properties (i.e., pore size and porosity) on the COF-LZU1 layer formation. The substrates with tunable pore size (18.61 to 14.53 nm) and porosity (2.05 % to 0.42 %) could be obtained with the pretreating temperature of 20 °C to 50 °C. Preheated substrate altered monomer storage and diffusion, leading to the variations in crosslinking degree (14.89 % to 87.63 %) and observed thickness (142.9–575.9 nm). The preheated substrates endowed better growth conditions by inhibiting the COF-LZU1 intrusion into the substrates, and optimal COF 40°C membrane had water flux of 6.57 L m −2 h −1 , and Na 2 SO 4 rejection ratio of 90.9 %. The rejection ratio of pharmaceuticals by COF-LZU1 membranes was low due to adsorption. Correlation analysis showed that the C N bond content was unfavorable for absorption ( P < 0.05), and the increase of crosslinking and crystallinity of the COF-LZU1 layer will be beneficial to boost the pharmaceutical rejection. This work provided a facile method and valuable insight for the COF-LZU1 membrane fabrication to enhance desalination and pharmaceutical removal.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Foods
·
2025
·Vol. 14
·期 4
·643
·
IF 5.1
Kumayl Hassan Akhtar,Ziwu Gao,Zeyu Zhang,Xiangxiang Sun,Yumei Yu,Jiale Ma,Dequan Zhang,Zhenyu Wang
Preheating and reheating play key roles in enhancing the nutritional and sensory qualities of stir-fried chicken. Thus, this study investigated the effect of preheating (D1) and reheating (D30) after 30 days of storage on the protein profile, lipid oxidation, flavor, texture, color, sensory properties, protein digestibility, and microstructure of household stir-fried chicken. Four doneness levels of preheating (medium rare (T1 = 62 °C), medium (T2 = 65 °C), medium well (T3 = 68 °C), and well done (T4 = 71 °C) and reheating (72 °C) were selected. Results revealed that preheating and reheating enhanced protein and lipid oxidation, while the unfolding of α-helix improved quality and digestibility. GC-MS identified 59 volatile compounds, including β-phellandrene and 1-octen-3-ol in preheating and anethole and benzaldehyde in reheating. Texture analysis showed decreased hardness, chewiness, and gumminess at T3. Lightness (L*) and redness (a*) were largely unaffected, except for the well done (D1T4, D30T4) doneness level, although yellowness (b*) increased with the increasing doneness levels. Sensory evaluation highlighted improved appearance, tenderness, and overall acceptability, particularly for D30T3. Digestibility enhanced with reheating, reaching up to 80% intestinal digestibility at D30T3. Microstructural analysis unveiled structural deformation, which was most pronounced at T4. Preheating followed by reheating enhanced meat quality attributes, with D30T3 emerging as the optimal doneness level for the industrial production of stir-fried chicken.
研究领域:
食品科学
·
营养学
✓ 已验证
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Chen Liang,Wensheng Liu,Qiang Liu,Yangrui Gao,Jijin Liu,Juan Wang,Shuwei Yao,Yunzhu Ma
Thermal decomposition is a critical process for fabricating alumina fibers using sol-gel methods. In this work, effects of preheating time on microstructure of prepared alumina fibers were studied. Results showed that core-sheath structure formed in the fibers when holding time exceeded 2 h at 400 °C. The fibers having core-sheath structure after thermal decomposition showed more residues, smaller crystal grain size and lower density. Thermal decomposition and densification of fibers were investigated. Results showed that core-sheath structure formed because fiber surface and core underwent different decomposition reactions due to the reduction in the number of gas channels on the fiber surface. This work provides a comprehensive study of thermal decomposition of precursor fibers and provides guidelines for developing appropriate calcination schedules.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Xinzhen Zhao,Changkun Liu
In this paper, a new type of floating solar evaporator with a three-layer composite structure has been successfully fabricated, with the carbon nanotube (CNT) as the photothermal layer, the silver nanowires as the preheating layer and the glass fibers as the insulation layer. The solar evaporator exhibited excellent solar absorption and photothermal conversion properties, and the surface temperature of the dried evaporator could reach 106 °C under one solar irradiation intensity. Importantly, the pure water evaporation rate and the solar evaporation efficiency of this evaporator were 1.70 kg/m 2 h and 95%, respectively. Based on the multi-layer composite structure of the evaporator, the addition of the silver nanowires as the preheating layer effectively reduced the loss of the thermal energy of the photothermal layer as the heat source and the evaporation region. The purpose of this study is to improve the solar energy efficiency by reducing heat conduction losses through the design of evaporators.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2015
·Vol. 51
·期 3
·1400-1408
·
IF 2.371
Ruan Zewen,Zhu Yongming,Teng Xiangguo
Layered LiNi 0.8 Co 0.15 Al 0.05 O 2 cathode materials have been synthesized by co-precipitation methods. The effect of pre-thermal treatment was investigated by thermogravimetric differential thermal analysis. Although X-ray diffraction has confirmed that all diffraction peaks in XRD patterns for samples treated at 500 ~ 750 °C can be a well-indexed hexagonal structure, the status of nickel ions varied. Samples pre-treated at different temperatures show different colors and had various contents of Ni 3+ measured by XPS. Powders that heated again at 800 °C under the condition of dried oxygen for 12 h after pre-thermal treatment show different electrochemical performances, which pre-thermal treated at 600 °C had a highest reversible specific capacity about 180 mAh·g −1 and capacity retention of 91.7 % after 50 cycles when cycled at a current density of 0.1 C between 2.5–4.3 V at room temperature. The relationship between the status of nickel ions and electrochemical performance was discussed. On the other hand, the capacity retention rates are 91.7, 96.6, and 98.0 % after 50 cycles at 0.1 C and at 100 %DOD, 80 DOD, and 50 %DOD.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2023
·
IF 5.6
Bo Yao,Hao-Ran Zhu,Bao-Dong Yan,Chuan-Xian Li,Fei Yang,Guang-Yu Sun,Hong-Bo Zeng
This paper investigated the effects of pre-heating treatment temperatures ( T pre ) on the flowability and wax deposition characteristics of a typical waxy crude oil after adding wax inhibitors. It is found that there is little difference in wax precipitation exothermic characteristics of crude oils at different T pre , as well as the wax crystal solubility coefficient in the temperature range of 25–30 °C. For the undoped crude oil, the flowability after wax precipitation gets much improved and the wax deposition is alleviated as T pre increasing. At T pre = 50 °C, the viscosity and wax deposition rate of crude oil adding wax inhibitors are higher than those of the undoped crude oil. When the T pre increases to 60, 70, and 80 °C, the flowability of the doped crude oil are largely improved and the wax deposition is suppressed with the T pre increase, but the wax content of wax deposit increases gradually. It is speculated that, on the one hand, the T pre increase helps the dispersion of asphaltenes into smaller sizes, which facilitates the co-crystallization with paraffin waxes and generates more aggregated wax crystal flocs. This weakens the low-temperature gel structure and increases the solid concentration required for the crosslink to form the wax deposit. On the other hand, the decrease in viscosity increases the diffusion rate of wax molecules and accelerates the aging of wax deposits. The experimental results have important guiding significance for the pipeline transportation of doped crude oils.
研究领域:
石油工程
·
化学工程
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2023
·
IF 8.4
Zhihui Yu,Li Ma,Binbin Liu,Wenqing Wang,Ziqi Shang,Huichao Dang,Chunyou Liu
Ovalbumin (OVA), characterized by its high concentration in eggs, possesses remarkable foaming properties. Nevertheless, OVA is highly sensitive to thermal changes and acid-base conditions, substantially hampering its application potential for foaming purposes within the food industry. This experiment aimed to examine the effects of preheating and high-intensity ultrasound (HIU) treatment at different powers on OVA foaming properties and explore the underlying mechanisms. The results revealed that OVA exhibited the highest foaming capacity (31.5 %) and foaming stability (96.7 %) under the treatment condition of 200w + 60°C. Additionally, significant improvements were observed in the content of free sulfhydryl groups (37.27 μmg/g), solution viscosity (142.33 mPa·s), and surface hydrophobicity (37.27 μg BPB) under this condition. The absolute value of the zeta potential (-10.28 mV) was significantly increased in the 200w + 60°C treatment group. Moreover, the polymer dispersity index of OVA (0.6045) was significantly reduced, resulting in improved dispersion than the control group. The structural analysis revealed significant changes in the α-helix and β-sheet content of OVA after treatment at 200w + 60 °C. The X-ray diffraction pattern exhibited sharper peaks, indicating a crystal structure, and the fluorescence peak displayed a slight blue shift along with increased hydrophobicity. Moreover, the preheating and HIU treatment induced a continuous uneven and irregular pore structure in OVA, which ultimately enhanced its foaming properties. In conclusion, the preheating and HIU treatment offers a novel approach to enhance the foaming properties of OVA.
研究领域:
食品科学
·
化学工程
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Xue Mingchen,Jin Liguo,Xu Junhao,Su Chaoying,Liu Xusheng,Fu Yaxian
CsPbIBr 2 inorganic perovskite films have become one of the photovoltaic materials with great development potential due to their excellent wet thermal stability and excellent photovoltaic performance, as well as relatively simple preparation process. However, the preparation process and film-forming mechanism of CsPbIBr 2 thin films are still immature, and the films are prone to structural defects such as pinholes and grain boundaries, resulting in poor film-forming quality. Here, in this study, the controlled preparation of CsPbIBr 2 films was achieved under additive-free conditions by regulating the humidity and temperature during the film-forming process in combination with the substrate preheating treatment (SPT) strategy, and the ambient temperature–relative humidity influence on the grain growth of CsPbIBr 2 ₂ was systematically explored to achieve the highest film coverage at 80–90 °C, and different surface topographies were obtained under different environments, CsPbIBr 2 films with different surface morphology, crystallinity, light absorption properties, and grain size were obtained under different environments. Notably, the CsPbIBr 2 films prepared at 20 °C, RH: 10% exhibited smooth and flat surface morphology, with larger grain size and fewer grain boundaries, and the corresponding carbon-based PSC devices achieved excellent photovoltaic performance, with the Jsc: 10.98 mA/cm 2 , Voc: 1.16 V, FF 0.55, and PCE of 6.95%.
研究领域:
光伏技术
·
材料科学
·
钙钛矿太阳能电池
·
薄膜制备
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2024
·Vol. 89
·期 11
·7534-7548
·
IF 3.2
Yiqing He,Haiwen Sun,Bingyao Han,Tosin Michael Olajide,Minxin Yang,Qianqian Miao,Xianyan Liao,Junyi Huang
This study investigated the effects of preheat treatment (70–100 °C) and syringic acid (SA) grafting on the antioxidant, antibacterial, and physicochemical properties of black soybean protein isolate (BSPI) before and after in vitro digestion. The results revealed that both preheat treatment and SA grafting increased the digestibility and the absolute zeta potential value of BSPI. However, as the preheating temperature increased, the antioxidant ability of BSPI decreased, which was improved by SA grafting. During in vitro digestion, the absolute zeta potential and antioxidant activities of preheated BSPI and preheated BSPI–SA complex followed the order: intestine > gastric > before digestion. Compared with before digestion, preheated BSPI with its SA complex after in vitro digestion exhibited excellent antibacterial activities. Importantly, the preheated BSPI–SA complex enhanced the SA recovery rate during digestion and SA stability, with the highest recovery rate observed for the SA-grafted BSPI with preheat treatment at 100°C (BSPI100–SA). The principal component analysis sufficiently distinguished preheated BSPI and preheated BSPI–SA complexes. There were partitions between BSPI and BSPI–SA treated at different preheating temperatures. This study contributes to expanding the potential applications of BSPI with its SA complex in food products and offers guidance for designing SA delivery systems. Practical Application Preheated BSPI–SA complexes could serve as functional ingredients in food or health products. Besides, preheated BSPI has application potential as a carrier for SA delivery.
研究领域:
食品科学
·
营养学
·
蛋白质化学
·
抗菌技术
✓ 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）