高师理科学刊
高師理科學刊
고사이과학간
JOURNAL OF SCIENCE OF TEACHERS' COLLEGE AND UNIVERSITY
2014年
1期
73-75
,共3页
扑热息痛%环糊精%相溶解度法%热力学函数
撲熱息痛%環糊精%相溶解度法%熱力學函數
복열식통%배호정%상용해도법%열역학함수
paracetamol%cyclodextrin%phase-solubility method%thermodynamic functions
从热力学观点出发,阐述以羟丙基-β-环糊精(hydroxypropyl-β-cyclodextrin,(HP-β-CD))作为扑热息痛的包合载体时,包合反应的热力学函数(Kc, Hθ?,ΔSθ及ΔGθ)。采用相溶解度方法测定扑热息痛与HP-β-CD的包合物在不同温度下的平衡常数。结果表明,在水溶液中,扑热息痛的浓度随HP-β-CD浓度的增加呈线性增加(相溶解度曲线为AN型);HP-β-CD与PA的包合反应为放热反应;HP-β-CD与PA的包合反应为热力学驱动,低温时增溶效果较高温时好。
從熱力學觀點齣髮,闡述以羥丙基-β-環糊精(hydroxypropyl-β-cyclodextrin,(HP-β-CD))作為撲熱息痛的包閤載體時,包閤反應的熱力學函數(Kc, Hθ?,ΔSθ及ΔGθ)。採用相溶解度方法測定撲熱息痛與HP-β-CD的包閤物在不同溫度下的平衡常數。結果錶明,在水溶液中,撲熱息痛的濃度隨HP-β-CD濃度的增加呈線性增加(相溶解度麯線為AN型);HP-β-CD與PA的包閤反應為放熱反應;HP-β-CD與PA的包閤反應為熱力學驅動,低溫時增溶效果較高溫時好。
종열역학관점출발,천술이간병기-β-배호정(hydroxypropyl-β-cyclodextrin,(HP-β-CD))작위복열식통적포합재체시,포합반응적열역학함수(Kc, Hθ?,ΔSθ급ΔGθ)。채용상용해도방법측정복열식통여HP-β-CD적포합물재불동온도하적평형상수。결과표명,재수용액중,복열식통적농도수HP-β-CD농도적증가정선성증가(상용해도곡선위AN형);HP-β-CD여PA적포합반응위방열반응;HP-β-CD여PA적포합반응위열역학구동,저온시증용효과교고온시호。
The thermodynamic function(Kc , Hθ? , ΔSθ and ΔGθ )of complexation of paracetamol with hydroxypropyl-β-cyclodextrin are investigated . The complexation constant was determined under various temperatures by the phase-solubility method.The results showed that in aqueous solutions,the paracetamol solubility increases linearly with the concentration of HP-β-CD (AN-type phase-solubility curve) and the complexation of paracetamol with HP-β-CD is an exothermic reaction.The complexation of paracetamol with HP-β-CD is enthalpy driven,indicating that lowering the temperature can do more to increase improve the solubility of paracetamol.