Journal of the Taiwan Institute of Chemical Engineers
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2023
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IF 5.7
Tao Zhang,Guiqing Zhang,Zuoying Cao,Mingyu Wang,Wenjuan Guan,Shengxi Wu,Qinggang Li
Background The NH 3 , a clean reductant, generated by the thermolysis of NH 4 VO 3 , is not effectively utilized in the conventional process of vanadium metallurgy. Additionally, the preparation process of V 2 O 3 is both long and costly. Ammonia recovery is essential to prevent environmental issues resulting from ammonia release. By direct thermolysis of NH 4 VO 3 and effectively utilizing of active NH 3 , it is possible to achieve the short flow and green process for the production of V 2 O 3 . Method In an open NH 3 atmosphere, one end of the flange was connected to the liquid ammonia gas cylinder, while the other end was connected to the tail gas absorber. Furthermore, in a closed NH 3 atmosphere, both ends of the tube furnace were sealed with flanges, and the initial atmosphere in the tube was pre-injection NH 3 . The products of NH 4 VO 3 thermolysis were characterized using various techniques, including XRD, FT-IR, ICP-OES, SEM, XPS, and TG. Significant finding The thermolysis process of NH 4 VO 3 with pre-injection of NH 3 under the sealed condition was a simulation of the continuous production process of V 2 O 3 using a rotary kiln in industrial production. The rational utilization of ammonia resulted in the reduce of energy consumption, extra reductant consumption, and significant NH 3 emissions compared to the traditional V 2 O 3 production process. It was observed that V 2 O 3 was easily obtained through the thermolysis of NH 4 VO 3 with pre-injection of NH 3 under the sealed condition at 600 °C for 3 h, using a dosage of NH 4 VO 3 ranging from 2 g to 10 g. During this process, the NH 4 VO 3 went through the phase transition as follows: NH 4 VO 3 →NH 4 V 3 O 8 →(NH 4 ) 0.38 V 2 O 5 →V 6 O 13 →VO 2 →V 4 O 7 →V 3 O 5 →V 2 O 3 , and the relevant characterization of products showed that the V 2 O 3 obtained was qualified. These experimental results were of great significance to the industrial practice of vanadium metallurgy. Based on these results, short flow and green process of V 2 O 3 could be achieved in industry by partially improving the calcination process of NH 4 VO 3 in large-scale rotary kilns.
研究领域:
冶金学
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材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Xixue Yang,Hui Li,Ling Li,Minhua Li,Tieling Xing,Guoqiang Chen
Superhydrophobic (SH) fabric is widely used in production and life because of its excellent water repellency, self-cleaning, and anti-fouling properties, however, long process and poor durability against repeated laundering and abrasion of SH fabrics remain challenges. In this study, we report a fluorine-free, short-process and robust SH cotton fabric obtained by dip-coating with SH coatings based on UV induced thiol–ene click reactions among 3-mercaptopropyltriethoxysilane (MPTES), octavinyloctasilasesquioxane (OV-POSS) and 2 %–3 % (mercaptopropyl)methylsiloxane-dimethylsiloxane co -polymers (S-PDMS), and the coated fabric is enough durable against repeated laundering, abrasion, chemical corrosion and UV aging. Furthermore, its self-healing ability owing to heat treatment (140 °C, 30 min) can further improve the coating durability, based on which the coating can withstand at least 28 cycles of repeated accelerated washing (equivalent to 140 cycles of normal home laundering) and maintain its superhydrophobicity. Additionally, the coating can separate oil-water mixtures, and the separation efficiency is more than 99 %, even after 10 cycles of repeated oil-water separation processes. The combination of short-process and self-healing ability makes it very promising in the large-scale manufacturing and application of SH surfaces.
研究领域:
材料科学
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOM
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2022
·Vol. 74
·期 5
·2094-2105
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IF 2.597
Zhou Tao,Dai Jie,Xiao Zhu,Qiu Wen-Ting,Lei Qian,Liu Xinwei,Qin Liuxin,Ma Muzhi
Combining short-process reduction and vacuum hot pressing, copper matrix composites with the graphite volume fraction of 55% and 70% were prepared by cuprous oxide and spherical graphite (Cu 2 O-Gr composites). Transmission electron microscopic (TEM) results show that some graphite particles in Cu 2 O-Gr composites change from spherical to finer flocculent or acicular shape, and the interface between the matrix and graphite is partially coherent. The reaction enhances interface bonding and modifies the interface morphology of graphite, leading to the good mechanical performance of the composites. Compared with the Cu-Gr composites prepared by conventional hot pressing, the Cu 2 O-Gr composites present higher density and strength and lower friction coefficients and wear rates. In the current-carrying friction experiments, the wear rate of the Cu 2 O-55Gr is nearly 25% lower than that of the Cu-55Gr. The short-process reduction contributes to better self-lubricating behaviors of the Cu 2 O-Gr composites, reducing the adhesive wear and abrasion wear.
研究领域:
材料科学
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摩擦学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER TESTING
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2023
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IF 5.1
Lvzhu Cheng,Amjad Farooq,Hai Wei Yang,Peng Wang,Qifan Qiao,Mingming Guo,Yong Wang,Zongqian Wang
Golden cocoon silk fibers suffer a lot from limited yield and serious color losing, which greatly restrict their uses. The development of golden cocoon-like silk fibers can effectively address the above issues. Herein, a low-dosage chemicals, short process alternative approach to reactive dyeing of golden cocoon-like silk fibers with robust color fastness was proposed. Investigation involves the pretreatment of the above silk via one-bath method followed by reactive dyeing. The results indicate that the color of as-prepared golden cocoon-like silk fiber is comparable with the commercial golden cocoon one. The short-process dyeing and robust color fastness with reactive dyes of silk fiber can be realized via the introduction of alkali. Importantly, no obvious color degradation following cyclic washing was observed, with the value of color difference within 2.0. Additionally, the tensile behavior of reactive dyed golden cocoon-like silk fiber was not significantly decreased as compared with the raw fiber.
研究领域:
纺织科学
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材料科学
✓ 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）