刘昭铁
主要从事高分子的合成、高分子化学与物理、两亲性高分子自组装、高分子微胶囊的组装以及纳米球药物输送等研究,在合成方面以阴离子、阳离子、自由基等方法为主,合成了亲水性高分子、疏水性高分子、两亲性高分子、多官能团性高分子、非线性性、星状型高分子等多种医药用高分子材料。
个性化签名
- 姓名:刘昭铁
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
物理化学
- 研究兴趣:主要从事高分子的合成、高分子化学与物理、两亲性高分子自组装、高分子微胶囊的组装以及纳米球药物输送等研究,在合成方面以阴离子、阳离子、自由基等方法为主,合成了亲水性高分子、疏水性高分子、两亲性高分子、多官能团性高分子、非线性性、星状型高分子等多种医药用高分子材料。
刘昭铁,博士、教授、博导,1965年出生于湖南省安化县。1988年获湖南师范大学理学学士学位,1991年在中国科学院山西煤炭化学研究所获物理化学理学硕士学位,1995年1月在中国科学院山西煤炭化学研究所获有机化工博士学位,并留所工作。1995~2000年先后主持了原国家科委专用化学品专项项目 “甲酸甲酯催化剂的开发”,中国科学院 “九、五” 重大攻关项目 “天然气、炼厂气转化利用新技术研究与开发”,国家自然科学基金,国家工程研究中心等项目。
1995年被中国科学院破格晋升为特聘研究员。同年获准中国科学院跨世纪学术带头人第二批 “百人计划” 资助,在中国科学院成都有机化学研究所天然气转化重点实验室主持 “天然气转化制高附加值化学品” 项目。主要从事 “合成气低温合成甲醇联产甲酸甲酯”、“乙炔与甲酸甲酯加氢酯化合成丙烯酸甲酯”、“甲酸甲酯异构化制乙酸” 等课题的研究与开发。其中 “丙烯酸甲酯的合成方法” 分别获中国发明专利 (ZL 96117838.8) 和美国发明专利 (US6022990, 2000)。
1996年入选国家人事部等七个部委 “百千万人才工程” 第 一、二层次人选。1997年获国务院特殊津贴,四川省学术和技术带头人,获四川省有突出贡献优秀专家称号。1997年获中国科学院有突出贡献的中青年专家称号。1998年被批准为博士生导师。
1997年7月~2000年12在康捏狄格大学和麻省大学化工系做高级访问教授,从事超临界条件下纳米材料的合成、表面活性剂的研制和导电高分子材料的研究开发。
2001 年 1 月~2004 年 2 月,在加拿大的麦基尔大学工作。主要从事高分子的合成、高分子化学与物理、两亲性高分子自组装、高分子微胶囊的组装以及纳米球药物输送等研究,在合成方面以阴离子、阳离子、自由基等方法为主,合成了亲水性高分子、疏水性高分子、两亲性高分子、多官能团性高分子、非线性性、星状型高分子等多种医药用高分子材料。
2004年3月回国工作,现为陕西师范大学化学与材料科学学院教授、博士生导师,陕西师范大学学术委员会委员,第十三届中国化学会催化委员会委员和中国化工学会超临界流体专业委员会委员。主持国家科技部973前期专项1项(2004CCA00700),国家自然科学基金面上项目1项(20473051),教育部留学回国人员科研启动基金1项和陕西省自然科学基金2项,横向课题多项。目前主要从事超临界介质中材料合成、绿色催化反应和高分子材料合成与应用的研究。
在国内外学术刊物上发表论文60余篇,其中SCI源期刊20多篇,已获美国发明专利和中国发明专利各一项,已申请中国发明专利14项。现为Green Chemistry、Ind. Eng. Chem. Res.、J. Chem. Eng. Data、Polymer、Soft Matter、Cellulose、Asia-Pacific Journal of Chemical Engineering、Chemical Engineering Journal、Environmental Chemistry Letters、Environmental Science & Technology、International Journal of Molecular Sciences、Journal of MembraneScience、Journal of Applied Polymer Science、Materials Letters、Physical Chemistry Chemical Physics等刊物的审稿人。
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20
【期刊论文】Adjustable Wettability of Methyl Methacrylate Modified Ramie Fiber
刘昭铁
,-0001,():
-1年11月30日
The surface hydrophobicity/hydrophilicity of ramie fiber was regulated through the atom transfer radical polymerization of methyl methacrylate from initiators immobilized on the fiber. The optimal reaction conditions for preparing the macroinitiated ramie fiber were determined to be a temperature of 608C and a reaction time of 24 h. The grafted copolymers were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, energy-dispersive analysis of X-rays, gel permeation chromatography, and thermogravimetric analysis. The results indicate that poly (methyl methacrylate) was covalently bonded onto the surface of the ramie fiber, and the polymerization of methyl methacrylate was a living/controlled process under the investigated conditions. The results of the contact angle measurements indicate that the wettability of the ramie fiber could be widely regulated by control of the grafted ratios of poly(methyl methacrylate) from 26 to 33 wt %.
atom transfer radical polymerization (, ATRP), , differential scanning calorimetry (, DSC), , fibers, graft copolymers, modification
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【期刊论文】Benzylated Modification and Dyeing of Ramie Fiber in Supercritical Carbon Dioxide
刘昭铁
,-0001,():
-1年11月30日
The effects of pretreatment conditions, including the addition of a phase-transfer catalyst, on the benzylation of ramie fiber were investigated in this study. Raw and benzylated ramie fibers were dyed in supercritical carbon dioxide, and the color strength (K/S) of the ramie fiber was measured by ultraviolet–visible spectroscopy. An obviously improved dyeing capability of the benzylated ramie fiber, that is, a better level-dyeing property and a higher K/S, was achieved. Moreover, the color strength of the ramie fiber, indexed as the value of K/S, increased significantly with the degree of substitution of the benzylated ramie fiber. The raw and modified ramie fibers were characterized with Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry.
biofibers, degree of polymerization (, DP), , dyes/, pigments, modification, morphology
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【期刊论文】Study on the performance of ramie fiber modified with ethylenediamine
刘昭铁
,-0001,():
-1年11月30日
The chelate molecule, ethylenediamine, was incorporated onto the surface of ramie fiber via sequential reactions of the hydroxyl groups on ramie fiber with epichlorohydrin followed by the chelating agent. The performance of the modified material (CelNH) was characterized by Fourier transform infrared spectroscopy (FI-IR), X-ray diffraction (XRD), scanning electron micrographs (SEM), thermogravimetry analysis (TGA), UV–Vis, and elemental analysis. Results show that the excellent characteristics of the raw fiber were still remained after modification although the crystallinity of the modified fiber decreased. The modification parameters were optimized as the concentration of ethylenediamine of 0.75 mol/l, the temperature of 50 C, and the reaction time of 5 h. Meanwhile, the dye of C.I. reactive red 2 was used to study the dyeability of the raw and the modified fibers. The color strength and the dye uptake of the modified fiber increased obviously with an increase in the nitrogen contents in CelNH. The color strength and the dye uptake of the modified fiber can be controlled by changing the extent of surface modification of raw ramie fiber.
Ramie fiber, Ethylenediamine, Epichlorohydrin, Dyeing, Surface modification
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刘昭铁
,-0001,():
-1年11月30日
The multi-walled carbon nanotubes (MWCNTs) having different outer diameters but similar inner diameters were loaded with 3.0 wt.% Pt via the reduction of H2PtCl6 by formaldehyde in the solution of ethanol and water. For both the MWCNT supports and catalysts, the BET surface areas and pore size distributions determined by N2 adsorption and desorption were varied significantly although type II adsorption isotherms with closed hysteresis loops were observed. The 3.0 wt.% Pt/MWCNT catalysts were investigated for the selective hydrogenation of cinnamaldehyde (CALD) in a batch reactor under the conditions of 80 8C and 2.0 MPa of hydrogen. All the catalysts showed reasonably high catalytic activity but significantly different product selectivities. The highly selective hydrogenation of C C bonds into hydrocinnamaldehyde (88% selectivity at 100% conversion) occurred over Pt-supported MWCNT4 with the biggest outer diameters (>50 nm). In the case of the other three catalysts, however, C O bonds were selectively hydrogenated showing about 60–80% selectivities to cinnamyl alcohol (CA) depending on the catalysts and CALD conversions. Irrespective of the catalysts, the results of X-ray diffraction and highresolution transmission electron microscopy indicated that the metallic Pt particles with an average size of about 11 nm were overwhelmingly deposited on the outer surface of the MWCNTs. The binding energies of Pt and the surface atomic ratios of oxygen to carbon determined by X-ray photoelectron spectroscopy were slightly varied for different catalysts. Based on these characterization results together with the hydrogenation results of CA, the different selective behaviors of the Pt/MWCNTs catalysts were discussed. Besides other factors, the electronic effects induced by the significantly varied tube diameters of the MWCNTs played the major role in determining the selective behaviors of different catalysts.
Multi-walled carbon nanotubes,, Cinnamaldehyde hydrogenation,, Hydrocinnamaldehyde,, Cinnamyl alcohol,, Platinum-supported catalysts
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【期刊论文】New Process for Synthesizing Fluorinated Polymers in Supercritical Carbon Dioxide
刘昭铁
,-0001,():
-1年11月30日
The typical polymerization process in supercritical fluids (SCFs) was improved through modifying the reaction system and designing and using sampling tubes. The efficacy of the newly developed procedure was demonstrated by the free radical homopolymerization of 2,2,2-trifluoroethyl methacrylate (TFEMA) and coplymerization of TFEMA and N-vinylpyrrolidone (NVP) in supercritical carbon dioxide (scCO2). Results indicate that the newly developed procedure has the characteristics of minimum loss of reactants and polymerization starting at the desired temperature and pressure. Furthermore, the polymerization process can be well tracked by analyzing the reaction mixtures online sampled from the reactor at certain reaction times by FT-IR, 1H NMR, and GPC. The reaction time and the product properties can be optimized based on the tracking results. For the first time, block copolymers by free radical polymerization in scCO2 was successfully synthesized by sequential addition of TFEMA and methyl methacrylate (MMA) into the reactor at different reaction stages. The synthesized polymers were characterized by FT-IR, 1H NMR, 13C NMR, GPC, TGA, and DSC, respectively. It was proved that the losing of monomer, pollution to the environment, and distribution of the molecular weight of the synthesized polymers decreased while the yield of product, the reproducibility, and the controllability of polymerization increased after improvement of the polymerization process.
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【期刊论文】Preparation and characterization of highly dispersed nanocrystalline rutile powders
刘昭铁, Zhao-Tie Liu, Shushan Yao, Ping Sun, Liping Song, Jian Lu, Heping Xiong, Yuande Peng, Shouwei Tang
Z. -T. Liu et al. Materials Letters xx (2006) xxx-xxx,-0001,():
-1年11月30日
A highly dispersed nanocrystalline rutile powder (NRP) having ultrafine and narrow-distributed diameters was successfully prepared via an improved conventional liquid one-step method by introducing dioctyl sulfosuccinate sodium salt (AOT) surfactant in the peptization reaction anaphase. The average grain size of the product is 10–20 nm. The effects of the titanium tetrabutoxide (Ti(OBu)4) to ethanol volumetric ratio, the precipitation temperature, the peptization temperature and the presence of dioctyl sulfosuccinate sodium salt (AOT) on the preparation of NRP were studied. A new procedure for synthesizing NRP is proposed, and the optimum conditions for preparing NRP were obtained. The TEM, XRD, SEM and FT-IR results were also investigated in this work.
Nano-titania, Rutile, Dispersibility, Preparation, Microstructure
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刘昭铁, 彭源德, 刘正初, 唐守伟, 杨喜爱, 严理, 熊和平
纺织学报2006年8月第27卷第8期/Journal of Textile Research Aug., 2006, Vol. 27, No. 8,-0001,():
-1年11月30日
在35~55 ℃、7~15 MPa条件下,利用果胶粗酶液和木聚糖酶液,对苎麻韧皮进行超临界CO2 处理及其脱胶试验,考察了超临界CO2 处理苎麻韧皮前后酶液中的活菌数、酶活和脱胶效果。实验结果表明,经超临界CO2 处理1 h左右,苎麻脱胶菌的致死率在99 %以上;不同类型非纤维素降解酶,在超临界条件下的稳定性不同,木聚糖酶比较稳定,酶活仅降低1.6 % ,而果胶粗酶液的稳定性较差,酶活降低23.79 %;超临界CO2 介质有利于加速苎麻酶的脱胶催化反应进程,使苎麻脱胶效果提高60 %~100 %。
苎麻, CO2, 超临界, 果胶酶, 木聚糖酶
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刘昭铁, 彭源德, 杨喜爱, 严理, 唐守伟, 郑科, 熊和平
纺织学报2006年4月第27卷第4期/Journal of Textile Research Apr. 2006, Vol. 27, No. 4,-0001,():
-1年11月30日
对亚麻快速生物脱胶和温水沤麻过程中的果胶酶、木聚糖酶、纤维素酶、微生物、pH 值和还原糖等进行了动态变化研究。结果表明,2 种脱胶过程中果胶酶和木聚糖酶的变化趋势基本相似,酶活性脱胶前期均增加缓慢,中后期迅速增加;纤维素酶活性的变化趋势有明显的区别,快速生物脱胶的纤维素酶酶活性增加幅度小,酶活性低(0105 IUPmL左右) ,温水沤麻的纤维素酶在发酵72 h后迅速增加,脱胶完成后酶活性达0. 337 9 IUPmL ;微生物的变化趋势基本相似,在脱胶前期迅速增加、脱胶完成时开始下降;pH值和还原糖量的变化趋势分别呈“U”型和“M”型。
亚麻, 快速生物脱胶, 温水沤麻, 果胶酶, 木聚糖酶, 纤维素酶
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刘昭铁, 吴金
高分子通报2005年12月第6期,-0001,():
-1年11月30日
近年来,超临界二氧化碳(sc-CO2 ) 在聚合反应中的应用受到了越来越多的关注。本文主要综述了以sc-CO2 为反应介质的自由基聚合、阳离子聚合、过渡金属催化聚合、热致开环聚合、溶胶2凝胶聚合以及氧化耦合聚合的研究概况。一系列研究结果表明sc-CO2 是非常有前途的反应溶剂,在高分子合成领域将会有更加广阔的应用前景
超临界二氧化碳, 高分子, 聚合, 合成
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刘昭铁, Zhao-Tie Liu, Ling Liu, Jin Wu, Liping Song, Ziwei Gao, Wensheng Dong, Jian Lu
J. Chem. Eng. Data 2006, 51, 2045-2050,-0001,():
-1年11月30日
A series of AOT (aerosol-OT) analogue surfactants (sodium salt of dibutyl-2-sulfosuccinate, sodium salt of dipentyl-2-sulfosuccinate, sodium salt of dihexyl-2-sulfosuccinate, and sodium salt of dioctyl-2-sulfosuccinate) were synthesized and characterized by 1H NMR and elemental analysis. A static method coupled with gravimetric analysis is developed to measure the solubility of the surfactants in 1,1,1,2-tetrafluoroethane (HFC-134a) and supercritical CO2 (scCO2). The solubilities of the surfactants in HFC-134a and scCO2 are affected by the temperature, pressure, and carbon atom number of the surfactant. The solubility of the same surfactant in HFC-134a solvent is approximately two times that in the most commonly used supercritical solvent CO2. The pressuretemperature phase diagrams for water/HFC-134a microemulsions stabilized by the surfactants were determined using cloud-point measurements for a concentration range of the surfactant from (1.85 _ 10-3 to 5.60 _ 10-3) M, temperature up to 338 K, and pressure up to 40 MPa in a high-pressure vessel. At a fixed temperature, the cloud-point pressure increased with increasing water-to-surfactant molar ratio (Wo). At a fixed Wo, the cloudpoint pressure decreased with increasing temperature. The surfactant with the longest hydrocarbon chain has the highest cloud-point pressure even at lower surfactant concentrations.
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