徐铜文
博士 教授
中国科学技术大学 化学系
1. 膜技术及其相关过程;2. 化工传质与分离;3. 生物活性制剂的可控释放;4. 材料加工与成型。
欢迎化学工程、材料工程、环境工程、高分子化学和物理、药物学等专业背景的人士报考博士研究生或从事博士后研究。
- 姓名:徐铜文
- 目前身份:在职研究人员
- 担任导师情况:
- 学位:博士
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:高级-教授
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学科领域:
勘探地球物理学
- 研究兴趣:1. 膜技术及其相关过程;2. 化工传质与分离;3. 生物活性制剂的可控释放;4. 材料加工与成型。
徐铜文,1967年8月生于安徽霍邱。1989、1992年分别获合肥工业大学学士、硕士学位,1995年获天津大学博士学位。1997年南开大学博士后出站加入中国科大,2002年受聘中国科技大学教授、博士生导师,2000.9-12、2001.9-10、2006.12-2007.8、2007.12-2008.2分别以中日大学交流群学者、JSPS访问学者和韩国Brain Pool访问教授的身份在东京大学、东京工业大学、韩国光州科学技术院进行膜技术的合作研究。现担任J. Membrane Sci等九种国际期刊执行(客座)编辑、编委和《膜科学与技术》等两种国内期刊编委,担任中国膜工业协会专家委员会成员、国家基金委化学部评议组成员。指导研究生45名(其中博士生30名)、博士后5名。发表SCI论文200余篇,EI收录180余篇次,SCI他引1600余次,H因子27,4篇论文入选ESI高被引论文,一篇入选中国百篇最有影响国际论文,申请专利28项(20项授权)。指导本科生获全国挑战杯决赛一等奖(2011)。2004年入选教育部“新世纪优秀人才支持计划”;2007年获安徽省自然科学二等奖;2008、2009年获中国石油和化学工业协会科技进步一等奖(两次);2008、2010年获全国优秀化工科技工作者、国家杰出青年基金;2011年获安徽省第十二届青年科技奖。
主要研究方向:1. 膜技术及其相关过程;2. 化工传质与分离;3. 生物活性制剂的可控释放;4. 材料加工与成型。
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徐铜文
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-1年11月30日
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【期刊论文】Electrodialysis processes with bipolar membranes (EDBM) in environmental protection-a review
徐铜文, Xu Tongwen*
Resources, Conservation and Recycling 37 (2002) 1-22,-0001,():
-1年11月30日
Electrodialysis with bipolar membranes (EDBM) has recently gained increasing attention for the production of acids and bases from the corresponding salt solutions. This process can be very energy-efficient and has a multitude of interesting applications. The intention of this paper is to give a brief overview and technical advantages with the practical applications of EDBM in environmental protection including waste recovery and cleaning production.
Bipolar membrane, Water dissociation, Electrodialysis, Waste recovery, Cleaning production
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【期刊论文】PEG-catalytic water splitting in the interface of a bipolar membrane
徐铜文, RongQiang Fu, TongWen Xu, * Gang Wang, WeiHua Yang, and ZhongXiao Pan
Journal of Colloid and Interface Science 263 (2003) 386-390,-0001,():
-1年11月30日
This paper investigates the effect of polyethylene glycol (PEG) on the water dissociation of bipolar membranes. To do this, bipolar membranes were prepared by immersing anion exchange membranes in different-concentration solutions of different-molecular-weight PEGs and then casting the solutions of sulfonated polyphenylene oxide (SPPO) on the anion exchange membranes. All the bipolar membranes with PEG in the interface are evaluated by current-voltage curves. The experimental results prove that PEG has excellent catalytic function for water dissociation. Furthermore, this function is enhanced by both PEG amount (PEG concentration) and PEG molecular weight in the interface of a bipolar membrane.
Bipolar membrane, Water splitting, Interface, Polyethylene glycol
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徐铜文, Rong-Qiang Fu, Tong-Wen Xu*, Zhong-Xiao Pan
Journal of Membrane Science 251 (2005) 137-144,-0001,():
-1年11月30日
Herein, a back-propagation artificial neural network (BP-ANN), a fit and predictive tool and suitable for bridging the inputs and outputs of a non-linear problem, is used to model the adsorption of bovine serum albumin (BSA) on porous polyethylene (PE) membrane. Based on the adsorption data from FTIR-mapping, the parameters of the neural network with a hidden layer are determined by a trial-and-error method. There is a good agreement between the predicted results by BP-ANN and the experimental data, and the interpolative predictions by BP-ANN are more precise than those by convectional diffusion equation. Though BP-ANN cannot provide detail information concerning the mechanism like a conventional diffusion equation (which can permit an evaluation of diffusion coefficient or mass transfer coefficient), it is a powerful predictive tool as well as a useful compensation to conventional diffusion equation when dealing with the problems of which the mechanism is not entirely understood or very complex.
Adsorption, Modelling, Membrane, Bovine serum albumin, Artificial neural network
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徐铜文, Xu Tongwena*, Yang Weihua a, He Binglin b
Chemical Engineering Science 56 (2001) 5343-5350,-0001,():
-1年11月30日
In this paper, both the percolation theory andthe three-phase model (TPM) are employedto study the ionic transport behavior in sulfonated poly(phenylene oxide) (SPPO) series membranes. The conductive fraction was obtained from TPM, which had consideredcontributions of both the functional group andthe neutral electrolytes impregnatedin the polymer gel. The critical thresholdat which the ions can be transportedthrough the membrane or the membrane transit from insulator to a conductor, was calculated by the experimental data of membrane conductivities with di8erent sulfonation degrees. The results showed that the thresholdchangedslightly from 0.14 to 0.19 when the concentration ranges from 0.01 to 0.1. Since the thresholdis mainly determinedby the active group zone andd istribution, so a geometrically average value 0.16 is reasonably assumedhere. This assumption coincides with the TPM which states that inter-gel fraction is not relatedwith external concentration but relatedwith the membrane properties. This experimental threshold is a little greater than the ideal value of 0.15 for a complete random system, suggesting that these ion cluster phases containing functional groups are not randomly dispersed in a practical SPPO membrane. If contribution of inter-gel is not considered, we will get a slightly larger value 0.18 as described in the previous paper. Therefore, a combination of TPM andpercolation theory can bring us more precise information on ionic transport in SPPO matrices.
Poly (, phenylene oxide), polymer, Ionic transfer, Ion exchange membrane, Percolation threshold, Three-phase model, Conductivity
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80浏览
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徐铜文, Rong-Qiang Fu, Tong-Wen Xu*, Yi-Yun Cheng, Wei-Hua Yang, Zhong-Xiao Pan
Journal of Membrane Science 240 (2004) 141-147,-0001,():
-1年11月30日
Starburst dendrimer polyamidoamine (PAMAM) with ellipsoidal or spheroidal shape is structure-regular and has much more amino groups than conventional polymers. This paper investigates the possibility of these amino groups onwater dissociation in a bipolar membrane interface. To do this, a bipolar membrane is prepared by casting the solution of sulfonated poly (phenylene oxide) (SPPO) in dimethyl formamide (DMF) on a commercial anion exchange membrane that is immersed in PAMAM aqueous solution in advance. The existence of PAMAM adsorbed on the membrane is proved by X-ray photoelectron spectroscopy (XPS), and the adsorption amount is evaluated by weighting method. The junction thickness of the prepared bipolar membrane is determined by electrochemical impedance spectroscopy (EIS), and the performance is evaluated by current-voltage curves. The experiments show that both the generation and concentration of PAMAM would strongly affect the characteristics of the bipolar membranes. There exists a transitional concentration for various generations PAMAMs to catalyze effectively the water dissociation, and above or below the transitional concentration the performance of bipolar membranes is decreasing. The higher the generation, the lower the concentration. Moreover, at a fixed solution concentration, there is not the simple relation of monotone decreasing or increasing between the performance of bipolar membranes and the generations of PAMAMs. All these can be explained according to the characteristics of PAMAMs combined with available water dissociation theory.
Bipolar membrane, Water dissociation, Starburst dendrimer, Polyamidoamine
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123浏览
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徐铜文, Rong Qiang Fu, Tong Wen Xu*, Wei Hua Yang, Zhong Xiao Pan
Journal of Colloid and Interface Science 278 (2004) 318-324,-0001,():
-1年11月30日
This paper investigates the behavior of bovine serum albumin (BSA) during water dissociation on a bipolar membrane (BPM). BSAmodified BPM is prepared by immersing polyethylene anion exchange membrane in different concentration solutions of BSA, then casting the solution of sulfonated poly(phenylene oxide) (SPPO) in dimethyl formamide. The modification of BSA was evidenced by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The junction thickness was evaluated by electrochemical impedance spectroscopy (EIS). The results showed that the typical I-V curves for bipolar membranes were heavily affected by the BSA modifications: the more the adsorbed amount of BSA, the larger the potential drop across a bipolar membrane. The new phenomena is underlined by the intrinsic properties of BSA molecules: steric effects give rise to an increase in the thickness of the depletion layer, amphoteric properties weaken the electric field of the junction, and hydrophobicity makes the junction less wet. All of these cause negative effects on water dissociation on a bipolar membrane.
Bipolar membrane, Water dissociation, Interfacial layer, Bovine serum albumin
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徐铜文, Rong-Qiang Fu, Yan-Hong Xue, Tong-Wen Xu*, Wei-Hua Yang
Journal of Colloid and Interface Science 285 (2005) 281-287,-0001,():
-1年11月30日
This paper investigates the effect of polyvinyl alcohol (PVA) as the intermediate layer of bipolar membranes on water dissociation. The bipolar membranes are prepared by coating a solution of sulfonated polyphenylene oxide (SPPO) on the anion exchange layers, which had been immersed in PVA aqueous solutions with different concentrations in advance. The experimental results show that the effect of PVA on water dissociation is significantly affected by its concentration: at low concentration range PVA solution catalyzes water dissociation and at high concentration range PVA solution shows a retardant effect. The phenomenon is different from the situation where polyethylene glycol (PEG) is used as the intermediate layer. Based on the adsorption data and the measurements of X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy, it is found that (1) the effect of PVA concentration on water dissociation can be explained by the competition and compromise of two effects-the catalytic and hydrophilic effect of the PVA molecule and the steric effect of the enlargement of junction thickness; (2) the reason that at high concentration range PVA and PEG show different effects on water dissociation is that the junction thickness is enlarged excessively by PVA, which is based on the intrinsic characteristics of PVA molecules.
Bipolar membrane, Water dissociation, Polyvinyl alcohol, Polyethylene glycol
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徐铜文, Tongwen Xu*, Weihua Yang
Journal of Membrane Science 238 (2004) 123-129,-0001,():
-1年11月30日
In this paper, a new preparation route for a series of bipolar membranes is proposed. The bipolar membranes are initiated directly from same base polymer poly (2,6-dimethyl-1,4-phenylene oxide) (PPO), in which the anion exchange layer is prepared by bromination with bromine and then quaternary amination instead of chloromethylation with chloromethyl methyl ether and then quaternary amination and the cation exchange layer prepared by conventional sulfonation. The fundamental characteristics of bipolar membranes, current-voltage curves, are fully discussed based on the properties of anion exchange layers which can be controlled by bromination position and content as well as the amination time. The results show that the prepared bipolar membranes can exhibit lower voltage drop over 100mA/cm2 and possess excellent industrial application potentials if the bromination process and amination process of anion exchange layers are properly controlled.
PPO, Water splitting, Bipolar membrane, Electrodialysis
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徐铜文, Xu Tongwen a, *, F.F. Zha b
Journal of Membrane Science 199 (2002) 203-210,-0001,():
-1年11月30日
The effects of amination time and temperature, the compositions of amination medium on membrane stability and ion-exchange capacity (IEC) are reported in this paper. It is revealed that the membrane's IEC increases with the amination time and attains to a plateau value after some time which is dependent on the temperature, e.g. 56h at 10℃, and 4 h at 45℃. To consider both the dimensional stability and the amination rate, it is recommended that the amination be conducted at 35℃ for 10h in most cases. Addition of some ethylenediamine (EDA) to the amination medium is favorable to the membrane stability due to the formation of crosslinking structure in the membrane bone but it will cause a slight decrease in IEC. From both the IEC and the stability points of view, the content of saturated EDA should be controlled within 10% of the whole amination agent. To compare with the previous paper [1], the effect of base membranes on IEC and stability is also investigated. It is shown that the membrane dimensional stability can be improved by aryl substitutions without the change of the membrane IEC. Therefore, there are some alternative ways to increase the membrane stability or mechanical strength, e.g. by an increase in the content of EDA (crosslinking agent) or aryl bromine content, a decrease in amination time and temperature and the content of trimethyl amine, etc. By properly balancing them, a series of anion exchange membranes can be obtained to meet different industrial requirements, such as in diffusional dialysis, electrodialysis and water splitting processes.
Anion exchange membrane, Amination, rosslinking, Ion-exchange capacity, Dimensional stability
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