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Free arc liquid‑phase dispersion method for the preparation of carbon nanotube dispersion
Shaolong Li,Youdong Ci,Da Zhang,Chuanqi Zhang,Yan He 한국탄소학회 2021 Carbon Letters Vol.31 No.2
In this study, a new method of rapid preparation of carbon nanotube (CNT) solution with highly dispersed morphology by free arc excitation is proposed, which shortens the time of the preparation of CNT solution with low concentration. The principle is that the high-energy flow density heat generated by the free arc makes the vaporizable substance coated on the surface of CNTs vaporize rapidly, and then generates the bulk increasing motion, which makes the CNTs aggregates dispersed, and finally forms the CNTs gas-phase dispersion monomer with high dispersion or the cross-linking morphology of few CNTs. In this paper, the influence of gum Arabic (GA) and deionized water (DI water) contents in CNTs mixed electrode on the dispersion of CNTs in different environments (gas phase and liquid phase) is explored. In the limited case of this work, the dispersion effect is better when the mass ratio of CNTs, GA and DI water is 1:0.04:3.96 in the liquid-phase environment. The preparation method reported in this work is expected to be a rapid way to obtain low-concentration nanodispersion.
Li Shaolong,Qingdao University of Science and Technology,Qingdao University of Science and Technology,Qingdao University of Science and Technology,Liu Xingyang,He Yan,Zhang Chuanqi,Wang Jinyu,Fu Jinfe 한국탄소학회 2020 Carbon Letters Vol.30 No.6
To investigate the efect of gas dispersing carbon nanotubes (CNTs) and hot pressing method on the transparency and the conductivity of thin flms, the free arc was used to disperse the CNTs in a high dispersion rate, and the dispersed CNTs were rapidly pressed into the surface of the PET flm by hot pressing to obtain electrical conductivity. The relationship between the light transmission and sheet resistance of the flm was studied by changing the deposition time and the presence or absence of electrostatic adsorption. It was found that the CNTs modifed flm still retains good electrical conductivity (sheet resist�ance up to 6×104 Ω, light transmittance 69%) through the cleaning of surfactants and ultrasonic waves, which proves that hot pressing is a simple physical method to achieve efective combination of CNTs and flms.
A novel preparation and formation mechanism of carbon nanotubes aerogel
Li Shaolong,He Yan,Jing Chengwei,Gong Xiubin,Cui Lianlei,Cheng Zhongyue,Zhang Chuanqi,Nan Fei 한국탄소학회 2018 Carbon Letters Vol.28 No.-
A novel, unique, and effective method for carbon nanotube (CNT) dispersion by the free arc stimulation is proposed. CNTs are introduced as an aerogel into the air space via the dispersion method and can be utilized as a solution by adding it to solvents. The volume of the original generated CNT aerogel with a high-volume expansion ratio displays a performance two orders of magnitudes better than that of raw CNTs, which is considered a powerful characterization of the dispersion effect. The CNT aerogel, which was observed by scanning electron microscopy also showed a satisfactory dispersion morphology. Its structure and properties were tested before and after dispersion by Raman spectroscopy and great consistency was observed, which proved that the CNTs were undamaged. This approach may greatly promote the large-scale application of CNTs.
Zhao Jie,He Shaolong,Xiang Chenhuan,Zhang Shaoli,Chen Xinyue,Lu Xinyi,Yao Qiong,Yang Liping,Ma Liangming,Tian Weiwei 대한독성 유전단백체 학회 2023 Molecular & cellular toxicology Vol.19 No.3
Background T -cell acute lymphoblastic leukemia (T-ALL) is considered a malignant tumor with a high mortality rate. To combat this disease, exploring the mechanism of T-ALL progression is urgently needed. Krüppel-like factors (KLFs) are known as the transcription factors and mediate series of biological processes. KLF9 is a member of the KLF family which could serve as a tumor suppressor gene in most solid tumors. GEO Database analysis showed that KLF9 expression in normal T cells was higher than T-ALL cell lines and patients. However, the possible role of KLF9 in T-ALL progression is still unclear. Objective To uncover the possible eff ects of Krüppel-like transcription factor 9 (KLF9) on the progression of T-Acute lymphoblastic leukemia (T-ALL). Results The expression of KLF9 was low in human T-ALL cells. KLF9 suppressed the viability of T-ALL cells. In addition, KLF9 stimulated the apoptosis as well as autophagy of T-ALL cells. Mechanically, KLF9 suppressed AKT/mTOR pathway in T-ALL cells. Conclusion KLF9 suppressed viability and promoted autophagy as well as apoptosis in T-ALL cells by inhibiting AKT/ mTOR pathway.