COMBUSTION AND FLAME
·
2022
·
IF 5.767
Qianqian He,Jun Wang,Yaofeng Mao,Wei Cao,Jie Chen,Fude Nie
To improve and adjust the combustion and energy output of HMX/Al, graphite fluoride (CF) as oxidizer was introduced in HMX/Al and gradient structured HMX/Al/CF was prepared by additive manufacturing technology . For HMX/Al added with CF, a significantly exothermic peak is observed ranging from 860 to 950 °C due to the reaction of Al and fluorine derived from CF decomposition, and the heat release increases by 106.63% compared to that of HMX/Al. The fourth exothermic heat increases from 161.48 to 955.25 J/g with the increased Al content from 10 to 30 wt%. Moreover, the combustion rate and pressure output of HMX/Al have been improved by introducing CF. For HMX/Al added with CF, the combustion time decreases from 10.3 to 2.5 s, which is dependent on the Al content from 10 to 30 wt%. And the highest peak pressure is 1712.2 kPa when Al content is 20 wt% in HMX/Al/CF composites. Furthermore, gradient structured HMX/Al/CF consisting of three layers with Al content of 10, 20 and 30 wt% was prepared to improve combustion and pressure output. The combustion rate and peak pressure of gradient structured HMX/Al/CF are higher than those of single structured HMX/Al/CF. The highest peak pressure (∼2.24 MPa) is obtained when the Al content of the middle layer and outer layer is 30 wt% and 20 wt% in the gradient structured HMX/Al/CF cylinder, respectively. Finally, the reaction intermediates and combustion reaction products were fully characterized to understand the enhanced effect of CF in HMX/Al. This work provides a promoting way to improve and regulate the combustion reaction performance and pressure output of HMX/Al.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Meiqi Li,Na Chen,Huan Shang,Cancan Ling,Kai Wei,Shengxi Zhao,Biao Zhou,Falong Jia,Zhihui Ai,Lizhi Zhang
Heavy metals chelated with coexisting organic ligands in wastewater impose severe risks to public health and the ambient ecosystem but are also valuable metal resources. For sustainable development goals, the treatment of heavy metal complexes wastewater requires simultaneous metal–organic bond destruction and metal resource recovery. In this study, we demonstrated that a neutral pH electro-Fenton (EF) system, which was composed of an iron anode, carbon cloth cathode, and sodium tetrapolyphosphate electrolyte (Na6TPP), could induce a successive single-electron activation pathway of molecular oxygen due to the formation of Fe(II)-TPP complexes. The boosted •OH generation in the Na6TPP-EF process could decomplex 99.9% of copper ethylene diamine tetraacetate within 8 h; meanwhile, the released Cu ions were in situ deposited on the carbon cloth cathode in the form of Cu nanoparticles with a high energy efficiency of 2.45 g kWh–1. Impressively, the recovered Cu nanoparticles were of purity over 95.0%. More importantly, this neutral EF strategy could realize the simultaneous removal of Cu, Ni, and Cr complexes from real electroplating effluents. This study provides a promising neutral EF system for simultaneous heavy metal complexes wastewater treatment and resource recovery and sheds light on the importance of molecular oxygen activation in the field of pollutant control.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Haitao Bian,Juncheng Jiang,Zhichao Zhu,Zhan Dou,Botao Tang
Sulfur corrosion is one of the significant concerns that could cause potential hazards in the petrochemical industry, and the traditional periodical inspection techniques are insufficient to support timely and reliable monitoring of iron sulfides oxidation . The emerging data-driven fault detection models and innovative sensing technologies provide new opportunities to process safety monitoring. This article proposed an integrated approach that employed fiber-optic distributed temperature sensing (FO-DTS) system, electrochemical gas sensors, embedded systems , and neural networks to detect the exotherm of early-stage iron sulfides oxidation in complex scenarios. Specifically, the sulfides oxidation exotherm is simulated using programmed electrical heating devices, and a software simulation is conducted to optimize the heating rods power selection; the exothermic chemical reaction is carried out with the oxidation of dimethyl sulfoxide (DSMO) by hydrogen peroxide (H 2 O 2 ) in a simulated stainless-steel reactor. The continuous temperature data and its spatial distribution of the targeted reactor surface are generated by the DTS, and the SO 2 concentration is collected as an additional criterion. The edge computing gateway can handle the field data collection from different types of protocols and other auxiliary tasks. Furthermore, the performance of the field sensing system and the anomaly detection neural networks are tested. The result shows that the proposed method is able to distinguish the simulated iron sulfides oxidation exotherm from the chemical reaction exotherm with an acceptable accuracy rate. The details of the system components are also demonstrated as a reference for deploying similar sulfides oxidation monitoring tasks in practice.
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npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-9
·
IF 12.019
Zhang Chao,Zhang Chi,Wu Xinyue,Ping Jianfeng,Ying Yibin
Plant wearable sensors have potential to provide continuous measurements of plant physiological information. However, stable and high-fidelity monitoring of plants with glandular hairs and wax is challenging, due to lacking interface adaptability of conventional plant wearable sensors. Here, inspired by adaptive winding plant tendrils, an integrated plant wearable system (IPWS) based on adaptive winding strain (AWS) sensor for plant pulse monitoring was developed. The IPWS consists of three modules, i.e. an AWS sensor, a flexible printed circuit, and a smart phone APP display interface. As the key element, the AWS sensor can adaptively wrap around the tomato stem. Importantly, with the serpentine-patterned laser-induced graphene, the AWS sensor exhibits excellent resistance to temperature interference with a temperature resistance coefficient of 0.17/°C. The IPWS is demonstrated to be stable and high-fidelity monitoring the plant pulse, which can reflect the growth and water state of tomato plant in real time.
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ENERGY & FUELS
·
2022
·
IF 4.654
Hongming Jiang,Chengyang Li,Luyou Chen,Shuchang Yan,Yan Lin,Zengli Zhao,Zhen Huang,Shujia Wang,Hongyu Huang,Haibin Li
Chemical looping (CL) conversion is a fuel heat utilization technology with CO2 capture and pollution control capability. During the treatment of Cl-containing organic solid waste, a large amount of HCl is generated, along with highly toxic polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo-p-furans, thereby resulting in serious equipment corrosion and environmental harm. Red mud (RM) produced by the alumina industry is a potential cheap oxygen carrier (OC) with in situ dechlorination capability. In this paper, three types of RM are selected to study the evolution and varieties of Na- and Ca-containing compounds in the process of OC preparation and dechlorination. The dechlorination mechanisms and performances of the RM OCs under various reaction conditions are discussed. The results verify that the Na- and Na/Ca-rich RM OCs exhibit good dechlorination performances at a high reaction temperature. The RM OC components with dechlorination activity include Na in the form of soluble alkali (e.g., NaOH), Na2Ti3O7, and Na6Al4Si4O17, along with Ca in the form of CaO, Ca2SiO4, and CaTiO3, whereas NaAlSiO4, Na1.15(Al1.15Si0.85O4), and Ca2Al2SiO7 are inert. The dechlorination performances of the RM OCs are inhibited by the presence of water vapor and high temperature. In the dechlorination process using RM OCs, HCl first reacts rapidly with active elements on the surface of the OC with high dechlorination efficiency. With the saturation of surface-active elements, the reaction enters the HCl diffusion control stage, when the appropriate particle size of the OC and the gas residence time are helpful for improving the dechlorination efficiency.
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NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 30
·14479-14489
·
IF 3.925
Jiayu Yan,Zhen Zhang,Yongxin Shi,Qinglai Che,Qing Miao,Guihua Meng,Zhiyong Liu
Solar evaporation generation is a promising method for purifying high salinity water using renewable solar energy. However, the design for the efficient antifouling solar-thermal water evaporation of low-cost systems remains a challenge. Here, a simple, anti-oil-fouling and macroporous aerogel based on polyvinyl alcohol (PVA), sodium alginate (SA), and polyaniline (PANi) was prepared by an in situ polymerization and freeze-drying technique. Solar water evaporation experiments were performed on the aerogel under one-sun illumination. Because of the synergistic effects of the abundant macroporous structure, roughness of the surface, and hydrophilic polymeric matrix, the aerogel displayed high solar absorption, and superhydrophilic and underwater superoleophobic surface properties. As a result, under one-sun illumination, the aerogel had a maximum solar-thermal efficiency of 91.5% and an evaporation rate of 1.46 kg m−2 h−1. More importantly, the aerogel exhibited almost identical evaporation performance in oily wastewater and saline alkali water. After 25 cycles, the photothermal conversion efficiency was found to be 87% and the aerogel was still resistant to oil contamination. The high solar vapor generation rate and antifouling functionality make the macroporous aerogel a promising material for solar-thermal water desalination, even in oil-contaminated water.
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THIN SOLID FILMS
·
2022
·
IF 2.358
Peng Zhang,Emmanuel Jacques,Laurent Pichon,Olivier Bonnaud
An organic ambipolar charge trapping non-volatile memory device is proposed based on tris(8-hydroxy quinoline) aluminum(Alq 3 )/ fullerene(C 60 )/pentacene double heterojunctions. The double heterojunctions were analyzed and compared with the sole heterojunction. Even though the Alq 3 /pentacene sole heterojunction shows a negative threshold voltage shift for programming under negative biasing, light illumination is required to efficiently erase. In contrast, for C 60 /pentacene sole heterojunction, the negative shift of threshold voltage is observed even with a positive erasing voltage. By combining the two trapping layers, a large memory window with fully-electrical programming and erasing is obtained. The efficient programming and erasing of the double heterojunctions structure are analyzed, sufficient electrons can be injected that enables the electrical erasing, and the negative shift of the threshold voltage under positive erasing voltage for the C 60 /pentacene structure is suppressed due to the suppression of the large built-in potential for the sole heterojunction, which can be verified by a large positive shift for the pentacene/C 60 /pentacene double heterojunctions.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2022
·
IF 6.449
Yue Dong,Nana Pan,Minghao Zhu,Miao Tang,Yakun Wu,Zhenping You,Xiaoyan Zhou,Minzhi Chen
General flexible conductive hydrogels are excellent candidate as strain-sensor. However, they were usually suffered by high water-absorbing and low mechanical properties. Herein, by introducing delignified wood skeleton into polyacrylamide hydrogel, wood-based composite hydrogels (WCH) with low-swelling and high strength were successfully obtained. The fracture tensile strength of the WCH can reach as high as 19.8 MPa along the longitudinal direction of wood and 2.7 MPa along the transverse direction, which originated from the intrinsic structure of wood skeleton. After water-soaking, size and weight of the WCH increased by only 9 % and 42 %, much less than that of the pristine PAM hydrogel (70 % and 383 %). Based on finite element analysis , wood skeleton structure disperses the swelling stress, which was conducive to reduce the water-swelling of hydrogels. The WCH also showed high adhesion to polar substrates (28.55 kPa to paper) and repeatable adhesion properties. Moreover, the WCH sensors demonstrated stable strain sensitivity, which could monitor bending and pressing. The as-prepared WCH will be promising in broaden the application field of flexible conductive hydrogels as strain-sensors. This work also provides a simple method of balsa wood to new multi-functional and smart applications.
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Aging-US
·
2022
·
IF 5.955
Kui Huang,Bo Wu,Zhuhu Hou,Akhlaq Ahmad,Mushtaq Ahmed,Ayesha Ali Khan,Feng Tian,Fan Cheng,Wei Chu,Ke Deng
Estrogen and its receptor play a positive role in the development of osteoarthritis (OA). Psoralen is a plant-derived estrogen analog. This study aimed to verify whether psoralen inhibits OA through an estrogen-like effect. First, human primary chondrocytes in the late stage of OA were extracted to complete collagen type II immunofluorescence staining and cell proliferation experiments. Subsequently, estrogen, psoralen and estrogen receptor antagonists were co-cultured with OA chondrocytes, and RT-PCR was performed to detect the gene expression. A rabbit OA model was subsequently made by anterior cruciate ligament transection (ACLT). They were set as Sham group, OA group and Psoralen group, respectively. The articular cartilage samples were taken after 5 weeks of treatment, and the effect was observed by gross observation, histological staining, micro-CT scanning of subchondral bone. The results of cellular experiments displayed that the cultured cells were positive for collagen II fluorescence staining and 12 μg/mL psoralen was selected as the optimal concentration. In addition, psoralen had effects similar to estrogen, promoting the expression of estrogen tar-get genes CTSD, PGR and TFF1 and decreasing the expression of the inflammation-related gene TNF- α, IL-1β and IL-6. The effect of psoralen was blocked after the use of an estrogen receptor antagonist. Further animal experiments indicated that the psoralen group showed less destruction of cartilage tissue and decreased OASRI scores compared with the OA group. A subchondral bone CT scan demonstrated that psoralen significantly increased subchondral bone mineral density (BMD), trabecular thickness and trabecular number and decreased trabecular separation. In summary, psoralen inhibits the inflammatory production of chondrocytes, which is related to estrogen-like effect, and can be used to attenuate the progression of OA.
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PubMed
高影响因子
Biomaterials Science
·
2022
·Vol. 10
·期 16
·4479-4491
·
IF 7.59
Ke Zhou,Miao Feng,Hongli Mao,Zhongwei Gu
Although significant breakthroughs have been achieved in constructing complex tissue/organ models in vitro, the progress of 3D bioprinting has long been subjected to trade-offs between the printability and biocompatibility of bioinks. Methacrylated hyaluronic acid (HAMA) has been widely adopted for 3D bioprinting due to its limited immunogenicity and simple synthetic method. However, the challenges arising from HAMA are its limited mechanical properties, low printing resolution, inhomogeneity networks, and the accumulation of reactive oxygen species (ROS) during polymerization. Here, these limitations are addressed by developing a thiol-norbornene photoclick polysaccharide-based bioink (HC–HN), which is prepared through the modification of hyaluronic acid with norbornene functional groups (Nor) and cysteamine hydrochloride (Cys). Compared with traditional HAMA, the HC–HN bioink via a step-growth polymerization mechanism can realize increased viscoelastic properties, reduced ROS accumulation, and superior shape fidelity in a range of complex structures by 3D embedded bioprinting. To further confirm its potential in 3D bioprinting applications, the HC–HN bioink is employed to print a liver model in vitro, which shows higher albumin secretion and urea production. Furthermore, a markedly increased sensitivity to drug-induced hepatotoxicity is observed in the bioprinted liver model compared to the 2D culture. Therefore, the proposed photoclick HC–HN bioink expands the palette of available polysaccharide-based bioinks and greatly extends the biofabrication window to broaden the application opportunities of 3D bioprinting.
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PubMed
高影响因子
JOURNAL OF BASIC MICROBIOLOGY
·
2022
·Vol. 62
·期 11
·1360-1370
·
IF 2.65
Jiahe Fan,Chaoyi Lv,Zhizhou Li,Mengru Guo,Yichen Yin,Hui Wang,Wei Wang,Shiwei Sun
α-Glucosidase is the key enzyme on carbohydrate metabolism, and its bioactive inhibitors are supposed to be an effective therapeutic for type 2 diabetes mellitus. During our continuing study for discovering α-glucosidase inhibitors, a fungus GDZZ-G2 which is derived from a medicinal plant Callicarpa kwangtungensis Chun, exhibited significant inhibition on α-glucosidase. The strain was identified as Fusarium incarnatum by morphological and molecular methods. Further bioassay-guided fractionation result in six known secondary metabolites ( 1 - 6 ). All the compounds except 4 were isolated from F . incarnatum for the first time. Among them, an anthraquinonoid ( S )-1,3,6-trihydroxy-7-(1-hydroxyethyl)anthracene-9,10-dione (compound 1 ) exhibited strong inhibitory effect against α-glucosidase (IC 50 = 77.67 ± 0.67 μΜ), compared with acarbose (IC 50 = 711.8 ± 5 μΜ). An enzyme kinetics analysis revealed that compound 1 was an uncompetitive inhibitor. Besides, docking simulations predicted that compound 1 inhibited α-glucosidase substrate complex by binding Gln322, Gly306, Thr307, and Ser329 through hydrogen-bond interactions. Our findings suggested that compound 1 can be considered a lead compound for further modifications and the development of a new effective drug candidate in the treatment of type 2 diabetes mellitus.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Song Zou,Shuai Wang,Xin Ma,Hong Zhong
Effective collectors are essential for the flotation of copper sulphide resources. In this work, we prepared a novel surfactant containing C-O-C groups, O,O'-bis(2-butoxyethyl) ammonium dithiophosphate (BEAT), and mixed it with O-isopropyl-N-ethyl thionocarbamate (IPETC) as an emerging reagent scheme for efficiently improving the flotation recovery of chalcopyrite . Foaming performance tests revealed that BEAT possessed a stronger foaming ability and foam stability than methyl isobutyl carbinol (MIBC). Micro-flotation results indicated that a significant improvement of chalcopyrite flotation recovery of 92.43% was achieved when mixed IPETC/BEAT collectors (BEAT optimal molar fraction of 60%) of 4 × 10 − 5 mol/L at pH 7.0–7.5 were employed. Bench-flotation results of copper sulphide ores showed that compared with IPETC + MIBC (30 g/t + 36 g/t) or BEAT (30 g/t) alone reagent system, a smaller amount of mixed IPETC/BEAT collectors (only 20 g/t) scheme was able to obtain higher Cu recovery and Cu grade. Surface tension results implied that the mixtures provided higher surface activity than individual IPETC, thus exhibiting superior foaming properties and better water solubility. Wettability results suggested that mixed collectors possessed stronger hydrophobicity and superior selectivity towards chalcopyrite against pyrite than single collector. FTIR results demonstrated that mixed collectors were chemically involved with the chalcopyrite surface through co-adsorption. Intermolecular interaction parameter computation confirmed the positive synergistic effect of mixed collectors.
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