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Online since: November 2011
Authors: Bao Yun Zhang, Chang Mei Jiao, Peng Wang, Long Jiang, Bao Hua Ji, Dong Fang
Preparation of Expanded Perlite-based Binary Eutectic Composite of Phase Change Heat Storage Materials
Baoyun Zhang, Changmei Jiao, Peng Wang, Long Jiang,
Baohua Ji, Dong Fang*
School of Chemistry and Chemical Engineering, Yancheng Normal University
Yancheng 224002, China
E-mail: fang-njust@hotmail.com
Keywords: lauric acid-stearic acid; expanded perlite; composite phase change material; bianary eutectic system; latent heat; phase transition temperature
Abstract. the binary eutectic of lauric acid-stearic acid / expanded perlite composite phase change materials (PCM) was prepared using the method of vacuum impregnation.
The structures and properties of this composite PCM were characterized by FT-IR, SEM, DSC and TG analysis.
Fig.2 SEM images of perlite (above) and composite phase change materials (bottom) As showed in Fig 2, the appearance of perlite is any holes structure in the left image, the surface has abundant wrinkles, the edge is obvious, its specific area is quite big and there are many holes.
The structures and properties of this composite PCM were characterized by FT-IR, SEM, DSC and TG analysis.
Fig.2 SEM images of perlite (above) and composite phase change materials (bottom) As showed in Fig 2, the appearance of perlite is any holes structure in the left image, the surface has abundant wrinkles, the edge is obvious, its specific area is quite big and there are many holes.
Online since: February 2011
Authors: Da Song He, Cun Ping Liu, Xiu Ying Li, Sheng Guo
The pore structure of the samples so prepared was examined by adsorption measurement.
Adsorption capacity of SO2 and H2S onto ACF is not only determined by their textural characteristics, but also their surface chemistry, particularly the quantity and nature of oxygen-containing and nitrogen-containing functional groups [10].
According to Refs.[11-18], The peak with binding energy at 398.3eV can be ascribed to Pyridine-like structures, the other two peaks at 400.1eV and 401.3eV correspond to pyrrolic-like nitrogen or pyridine and Nitrogen-oxide peak at 403.1eV.
Adsorption capacity of SO2 and H2S onto ACF is not only determined by their textural characteristics, but also their surface chemistry, particularly the quantity and nature of oxygen-containing and nitrogen-containing functional groups [10].
According to Refs.[11-18], The peak with binding energy at 398.3eV can be ascribed to Pyridine-like structures, the other two peaks at 400.1eV and 401.3eV correspond to pyrrolic-like nitrogen or pyridine and Nitrogen-oxide peak at 403.1eV.
Online since: October 2013
Authors: Mei Ding, Ying Jie Lei, Hao Li, Xin Shi Wu
Microwave Promoted Synthesis of 2-(1H-Benzoimidazol-2-yl-4-phenol)-5-Aryl-1,3,4-oxadiazoles
Ying-jie LEI1,a, Hao LI1,b, Mei DING1,c and Xin-shi WU1,d
1School of Chemistry & Chemical Engineering, Tianjin University of Technology, China
ayingjlei@163.com, blihao@tjut.edu.cn, cding.mei@163.com, dwebwxs@sina.com
Keywords: 1,3,4-oxadiazoles, benzoimidazole, PEG, microwave.
Structures of the corresponding products were elucidated by IR and 1HNMR spectra and elemental analysis.
The structures were further confirmed by 1H NMR where, the phenolic hydroxyl was observed at δ 10.1-10.2 ppm.
Structures of the corresponding products were elucidated by IR and 1HNMR spectra and elemental analysis.
The structures were further confirmed by 1H NMR where, the phenolic hydroxyl was observed at δ 10.1-10.2 ppm.
Online since: July 2011
Authors: Yun Hui Fang, Fei Yu Yu, Tian Xing Lin, Miao Miao Gui, Xiu Xing Ma, Qing Chang Lin
Analyzing the structure of polycarboxylate superplasticizer before and after spray-drying by infrared spectroscopy, and verifying the conclusion through macroeconomic performance experiments.
In order to compare the change of molecular structure of polycarboxylate superplasticizer before and after spray drying.
:Polymer chemistry (Third edition)(Chemical Industry Press,Beijing 2003), in Chinese
In order to compare the change of molecular structure of polycarboxylate superplasticizer before and after spray drying.
:Polymer chemistry (Third edition)(Chemical Industry Press,Beijing 2003), in Chinese
Online since: August 2011
Authors: Jian Jiang Shang, Jian Ning Wu, De Qiang Li, Ya Xi Huang, Ling Ming Zhao, Jun Wang, Zhi Yong Liu
Research on Preparation and Hydrolysis Resistance of Poly(lactic acid) Modified by MDI
Jianjiang Shang1,2,a, Jianning Wu1,2, Deqiang Li1,2, Yaxi Huang1,2, Lingming Zhao1,2, Jun Wang1,2 and Zhiyong Liu1,2,b
1Xinjiang Bingtuan Key Laboratory for Green Processing of Chemical Engineering, Shihezi, Xinjiang, 832003, China
2College of Chemistry & Chemical Engineering, Shihezi University, Shihezi, Xinjiang, 832003, China asjjlxy@sohu.com, blzyongclin@sina.cn
Keywords: poly(lactic acid), isocyanate, biodegradable polymers, modified, hydrolysis resistance
Abstract.
The structure of MDI-PLA was confirmed by FTIR and its degradation properties were investigated.
The structure, composition, processing conditions for forming as well as the conditions of storage or use affect the hydrolysis rate of PLA products.
The structure of MDI-PLA was confirmed by FTIR and its degradation properties were investigated.
The structure, composition, processing conditions for forming as well as the conditions of storage or use affect the hydrolysis rate of PLA products.
Online since: July 2012
Authors: Yang Min, Yong Hang Zhang, Ou Zhao, Da Ming Ban
Synthesis, Characterization and Flame Retardancy of
Two Novels Amino Phosphate
Ban Daming1,a, Min Yang1,b, Zhang Yonghang1,c, Zhao Ou1,d
1 School of Chemistry and Material Science, Guizhou Normal University,
Guiyang Guizhou 550001, P.R.
The structure and spectroscopic data of these flame retardant were determined by Fourier Transform Infrared Spectroscopy (FTIR) and Elemental analysis.
The structure of CEP and MMP were confirmed by FTIR and element analysis.
The structure and spectroscopic data of these flame retardant were determined by Fourier Transform Infrared Spectroscopy (FTIR) and Elemental analysis.
The structure of CEP and MMP were confirmed by FTIR and element analysis.
Online since: October 2012
Authors: Yang Xin Yu
A Web information retrieval algorithm based on Web page segment is designed, the key idea of which is to segment each Web page into different topic areas or segments according to its HTML tags and contents since Web pages are semi-structure.
We establishs a HTML tag tree based on the HTML code nested structure of Web page, Each node in the tag tree is composed by the following some parts: l Tag name( and).
We establishs a HTML tag tree based on the HTML code nested structure of Web page, Each node in the tag tree is composed by the following some parts: l Tag name( and