表面活性含氟单体-丙烯酰胺共聚物溶液性质研究  

STUDY OF SOLUTION PROPERTIES OF COPOLYMER OF FLUORINATED SURFACE ACTIVE MONOMER AND ACRYLAMIDE

作　　者：李刚辉[1] 沈一丁[1] 李培枝[1] 唐新[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室陕西科技大学,西安710021

出　　处：《高分子学报》2010年第3期347-351,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号50673055);陕西科技大学科研启动基金(基金号BJ08-16)资助项目

摘　　要：以异佛尔酮二异氰酸酯(IPDI)、十二氟庚醇(FOH)、烯丙基聚乙二醇(APEG)合成的表面活性含氟单体(FSM)与丙烯酰胺通过水溶液聚合,制备出含氟疏水缔合聚丙烯酰胺(FPAM).用表面张力法研究了FSM的胶束化,用流变仪、动态激光光散射(DLS)和原子力显微镜(AFM)表征了FPAM溶液的流变性能、缔合结构尺寸和形态.结果表明,FSM在25℃下CMC为1.28 g.L-1,表面张力为26.77 mN.m-1.FPAM溶液属于假塑性体系,临界缔合浓度为0.660%,具有一定的耐盐性.DLS和AFM表明,在低于临界缔合浓度时FPAM溶液仍能产生大量的缔合结构,FPAM分子具有很强的疏水缔合性.In order to eliminate the disadvantageous effect of surfactant on relative molecular mass and post-treatment in preparing fluorinated hydrophobically associating polyacrylamide （FPAM） by free radical micellar copolymerization and to increase compatibility of fluorinated monomer and AM,fluorinated surfaceactive monomer （FSM） was synthesized by IPDI,dodecafluoroheptanol （FOH） and allyl polyethylene glycol （APEG） and copolymerized with AM by aqueous solution polymerization,then FPAM was achieved without post-treatment.The micellization of FSM was determined by surface tension.Rheometer,dynamic laser scattering （DLS） and atomic force microscope （AFM） were used to characterize rheological behaviors,size and morphology of the associative structure in FPAM solution,respectively.The results show that the critical micelle concentration （CMC） of FSM is 1.28 g＆#12539;L-1 at 25℃,and the according surface tension γCMC is 26.77 mN＆#12539;m-1 which displays that FSM possesses higher surface activity.FPAM solutions are belong to pseudoplastic fluid and have salt resistance to some extent.At the same time,the critical associating concentration of FPAM solution is 0.660%.Indicated by DLS and AFM,there exists an associative structure in FPAM solutions,even the concentration is lower than the critical associating concentration.Therefore,the FPAM molecules have strong hydrophobic association.

关 键 词：疏水缔合 表面活性单体 含氟单体 聚丙烯酰胺 流变性能 

分 类 号：O631.3[理学—高分子化学]