摘要
用正丁基锂作催化剂,合成了不同分子量的聚缩水甘油苯基醚预聚体（PPGE）,分别用浓H2SO4进行磺化,制得了可作为高分子表面活性剂的不同磺化度聚缩水甘油苯基醚磺酸钠（SPPGE）。研究了其结构与表面性能间的关系。结果表明,PPGE的分子量为1000-3000,SPPGE的磺化度为150%-250%,随着SPPGE质量浓度从2.5 g/L增至20.0 g/L,SPPGE的动态表面活性随之而增大,DST达到介平衡越快,DST曲线越低。在研究的浓度范围内,吸附初期属扩散控制吸附,后期属混合动力吸附,且浓度越高,吸附势垒εa越大,有效扩散系数Deff越小。3种不同磺化度的SPPGE的临界胶束浓度和最小表面张力值随磺化度变化不大,CMC值均在11.0 g/L左右,改变磺酸聚醚的分子量可以有效改变磺酸聚醚的表面活性,其中Mn为1595的表面张力曲线最低,其CMC值为10.9 g/L,γm in为48.93 mN/m。
A series of poly phenyl glycidyl ethers with different molecular mass （PPGE） was synthesized via the polymeration of phenyl glycidyl ether in the presence of n-BuLi. Sodium poly phenyl glycidyl ether sulfonate was synthesized via the sulfonation of the poly phenyl glycidyl ether with sulfuric acid. We studied the relationship between the performance of the Polymer surfactant and its structure. The result shows that the range of molecular mass of PPGE is from 1 000 to 3 000 and its sulfonation degree is from 150% to 250% , as well as the increase of the dynamic surface activity with the SPPGE concentration increase from 2.5 g/L to 20. 0 g/L, while the time of the DST achieving interface equilibrium is shorted, and the DST curve becomes lower. Within the scope of the SPPGE concentration under the study, in the beginning period, the adsorption is under diffusion control regime, while in the later period, it belongs to mixed kinetic adsorption, and the higher the SPPGE concentration , the bigger the adsorption barrier ε and the smaller the effective diffusion coefficient Deff. The SPPGE has a high critic micelle concentration and its CMC is about 11.0 g/L, and is less affected by the change of sulfonation degree. The change of the molecular mass can affect the surface activity effectively, among three different SPPGE samples, the one the molecular mass of 1 595 has the lowest DST curve with CMC being 10. 9 g/L and γmin being 48.93 mN/m.
出处
《应用化学》
CAS
CSCD
北大核心
2007年第7期810-817,共8页
Chinese Journal of Applied Chemistry
基金
湖北省教育厅自然科学重点研究资助项目(99A001)
关键词
分子量缩水甘油苯基醚
磺酸
合成
表面活性
molecular mass, phenyl glycidyl ether, sulfonic acid,synthesis, surface activity
