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A new 3D cupric coordination polymer as chemiresistor humidity sensor:narrow hysteresis,high sensitivity,fast response and recovery

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Science China Chemistry 2017年第9期60卷 1197-1204页

作者： Xiao-Jing Lv Ming-Shui Yao Guan-E Wang Yan-Zhou Li Gang Xu State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences University of Chinese Academy of Sciences Chinese Academy of Sciences

A new three-dimensional coordination polymer composed of Cu2+ centres and semiquinoid linkers (dhbq(2-)) was synthesized which was composed by two independent, enantiomeric, interpenetrated [Cu-2(dhbq)(3)](2-) networks with (10,3)-a topology. The compound has good water stability and typical behaviors of semiconductor, whose conductivity increases along with raising temperature. The chemiresistive humidity sensor made from this material shows good properties including linear sensitivity, high response, fast response and recovery, and particularly narrow hysteresis during humidity adsorption and desorption.

关键词： coordination polymer, chemiresistive humidity sensor, narrow hysteresis, fast response & recovery

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Adsorption performances and refrigeration application of adsorption working pair of CaCl_2-NH_3

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Science China(Technological Sciences) 2004年第2期47卷 173-185页

作者： WANG Liwei WANG Ruzhu WU Jingyi WANG Kai Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200030 China Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200030 China Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200030 China Institute of Refrigeration and Cryogenics Shanghai Jiao Tong University Shanghai 200030 China

The adsorption performance of CaCl2?NH3 is studied under the condition of different expansion spaces for adsorbent, and the relationships between adsorption performance of CaCl2?NH3 and the phenomena of swelling and agglomeration during adsorption are researched. It is found that the performance stability is related to the ratio of expansion space to the volume of adsorbent r as, and the performance attenuation is serious in the case of large r as. Severe adsorption hysteresis exists in the process of adsorption and desorption at the same evaporating and condensing temperatures, which is related to the stability constant of chemical reaction. This phenomenon cannot be explained by the theory of physical adsorption. Moderate agglomeration will be beneficial to the formation of ammoniate complex; the magnitude of expansion space will affect adsorption performance. Analysis shows that the activated energy needed in the process of adsorption for the sample with r as. of 2∶1 is less than that for the sample with r as of 3∶1. The refrigeration performance of CaCl2?NH3 is predicted from experiments. The cooling capacity of one adsorption cycle is about 945.4 kJ/kg for the adsorbent with an r as of 2∶1 at the evaporating temperature of 0°C. Keywords chemical adsorption - attenuation - adsorption hysteresis - ammonia - activated carbon - refrigeration

关键词： chemical adsorption, attenuation, adsorption hysteresis, ammonia, activated carbon, refrigeration.

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Study on the Bending Properties of Woven Fabrics and Its Yarns

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Journal of Donghua University(English Edition) 2002年第4期19卷 7-11页

作者：王府梅吴雄英 College of Textiles Dong Hua UniversityShanghaiChina200051 Shanghai Entry-Exit Inspection and Quarantine Bureau of P.R.C. ShanghaiChina 200135

A theoretical analysis on the two extreme cases of yarn bending rigidity as well as the relationship between them is proposed. The significant influence of fiber-to-fiber interaction on yarn bending rigidity is *** observation on the relationship between fabric/yarn bending property and fiber fineness, yarn structure, fabric structure is given as we ll. Three problems are discussed and the following conclusion is thus obtained. There exists, similar t0 a rigid engineering rod, a linear relationship between yarn bending rigidity and the square of yarn fineness (expressed as yarn count in tex), but the increasing speed is much lower. Yarn bending rigidity in the fabric also to a great extent depends on the fabric density and yarn twist factor, and so on. Fabric's bending hysteresis primarily depends on its bending rigidity.

关键词： bending rigidity, bending hysteresis, fabric, yarn

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