以稻杆为原料考察了不同温度和含氧量下生物质的低温烘焙过程,研究了有氧烘焙的机理。对含氧气氛下不同停留温度时的质量残留率和微分热重分析(DTG)曲线进行分析发现,停留温度对质量残留率影响较大,是烘焙过程的主导因素。对6个不同含...以稻杆为原料考察了不同温度和含氧量下生物质的低温烘焙过程,研究了有氧烘焙的机理。对含氧气氛下不同停留温度时的质量残留率和微分热重分析(DTG)曲线进行分析发现,停留温度对质量残留率影响较大,是烘焙过程的主导因素。对6个不同含氧量下的质量残留率和DTG曲线分析可知,氧气加快了反应的进行,且随着含氧量上升发生分解的组分有所增加。建立了6个含氧量下稻杆低温烘焙的动力学模型并计算了动力学参数,发现稻杆表观活化能在1.33 k J/mol到2.01 k J/mol之间,且氧浓度与活化能的线性拟合度较好。展开更多
The thermal and mechanical properties of Liquid Crystal Elastomers (LCEs) were characterized using various techniques for understanding of their physical behavior. The material used for investigation was synthesized b...The thermal and mechanical properties of Liquid Crystal Elastomers (LCEs) were characterized using various techniques for understanding of their physical behavior. The material used for investigation was synthesized by us, using Finklemann procedure, with proper cross linking density in nematic phase. The material is found to have unique coupling between anisotropicorder of liquid crystal component and elasticity of polymer network. The chemical structures were confirmed by Fourier Transform Infrared (FTIR) Spectroscopy and Scanning Electron Microscopy (SEM). Fabry Perot Scattering Studies (FPSS), Thermo gravimetric Analysis (TGA) and Differential Scanning Calorimatory (DSC) were used to study thermal properties. The mechanical properties were studied using force sensor. Our investigation shows that this synthesized Liquid Crystal Elastomer has ability of spontaneous change as a function of temperature and mechanical force, which shows it as a unique class of soft material.展开更多
文摘以稻杆为原料考察了不同温度和含氧量下生物质的低温烘焙过程,研究了有氧烘焙的机理。对含氧气氛下不同停留温度时的质量残留率和微分热重分析(DTG)曲线进行分析发现,停留温度对质量残留率影响较大,是烘焙过程的主导因素。对6个不同含氧量下的质量残留率和DTG曲线分析可知,氧气加快了反应的进行,且随着含氧量上升发生分解的组分有所增加。建立了6个含氧量下稻杆低温烘焙的动力学模型并计算了动力学参数,发现稻杆表观活化能在1.33 k J/mol到2.01 k J/mol之间,且氧浓度与活化能的线性拟合度较好。
文摘The thermal and mechanical properties of Liquid Crystal Elastomers (LCEs) were characterized using various techniques for understanding of their physical behavior. The material used for investigation was synthesized by us, using Finklemann procedure, with proper cross linking density in nematic phase. The material is found to have unique coupling between anisotropicorder of liquid crystal component and elasticity of polymer network. The chemical structures were confirmed by Fourier Transform Infrared (FTIR) Spectroscopy and Scanning Electron Microscopy (SEM). Fabry Perot Scattering Studies (FPSS), Thermo gravimetric Analysis (TGA) and Differential Scanning Calorimatory (DSC) were used to study thermal properties. The mechanical properties were studied using force sensor. Our investigation shows that this synthesized Liquid Crystal Elastomer has ability of spontaneous change as a function of temperature and mechanical force, which shows it as a unique class of soft material.
