摘要
采用反气相色谱法(IGC),于333.15~373.15 K温度范围内测定了有机溶剂型木质素的溶解度参数(δ2)及相关指标。以正辛烷(n-C8)、正癸烷(n-C10)、正十二烷(n-C12)和正十四烷(n-C14)为探针溶剂,计算了探针溶剂的特性保留体积(V0g)、摩尔吸收焓(ΔH1s)、无限稀释摩尔混合焓(ΔH1∞)、摩尔蒸发焓(ΔHv)、无限稀释活度系数(Ω1∞)以及探针溶剂与有机溶剂型木质素的Flory-Huggins相互作用参数(χ1∞2)。结果表明,上述4种探针溶剂在测定的温度范围内均为有机溶剂型木质素的不良溶液;在同一温度下,参数χ1∞2随着探针溶剂碳数的增加而降低。测得的有机溶剂型木质素的δ2为19.03(J.cm-3)1/2。
An inverse gas chromatographic (IGC) method has been used to measure the solubility parameters of organosolv lignin at the absolute temperatures from 333. 15 K to 373. i5 K. The test probe solvents were n-octane (n-C8), n-decane (n-C10)), n-dodecane (n-C12), azxd n- tetradecane ( n-C14). The specific retention volumes of the solvents ( ΔH0g ), the molar enthalpy of sorption (ΔHs1), the partial molar enthalpy of mixing at infinite dilution (ΔH∞), the molar enthalpy of vaporization ( AH,. ), the activity coefficients at infinite dilution ( Ω^∞1), and FloryHuggins inter action parameters (X∞2) between organosolv lignin and probe solvents were obtained. The results showed that the above four probes are poor solvents for organosolv lignin; at the same temperature, the X∞12reduced with the increase of the carbon number of probe solvents. The average solubility parameter of organosolv lignin was determined as 19.03 (J·Cm-3)1/2
出处
《色谱》
CAS
CSCD
北大核心
2013年第2期143-146,共4页
Chinese Journal of Chromatography
基金
国家自然科学基金项目(21106011
21276034)
辽宁省教育厅科学研究一般项目(L2012195)
关键词
反气相色谱
溶解度参数
有机溶剂型木质素
inverse gas chromatography (IGC)
solubility parameter
organosolv lignin