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| Simulation of Diffusion of Moisture in Insulation Paper and the Affect on Mechanical Properties of the Paper |
| Zhu Mengzhao1, Liao Ruijin2, Du Xiuming1, Zhou Jiabin1, Zhu Wenbing1 |
1. State Grid Shandong Electric Power Research Institute Jinan 250002 China;
2. Chongqing University Chongqing 400030 China |
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Abstract The diffusion behavior of water molecules in amorphous cellulose and their destructive effect on the mechanical properties of cellulose were investigated by molecular dynamics. Both the free volumes of amorphous cells and water molecule-cellulose interaction affect the diffusion of water molecules. The diffusion coefficient of water molecules has an excellent correlation with water molecule-cellulose interaction and the average hydrogen bonds between each water molecule and cellulose; however, this relationship was not apparent between the diffusion coefficient and free volume. It shows a weakening trend in cellulose cohesive energy density, solubility parameters and the mechanical properties with the increase of water content. The higher the water content one amorphous cellulose own, the bigger the interachain distance of cellulose molecules is, which indicates that the intermolecular interaction of cellulose molecules would be weakened by the water greatly.
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Received: 03 September 2014
Published: 29 June 2015
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2015, Vol. 30 
