应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2014年
7期
1263-1268
,共6页
席曼%张填昊%梁博%张宝砚
席曼%張填昊%樑博%張寶硯
석만%장전호%량박%장보연
PS-b-PAA嵌段共聚物%表面活性剂%自组装
PS-b-PAA嵌段共聚物%錶麵活性劑%自組裝
PS-b-PAA감단공취물%표면활성제%자조장
PS-b-PAA block coPolymer%surfactant%self-assembly两亲性嵌段共聚物在选择性溶剂中可通过自组
以丙三醇为基体，合成了三（2-（N，N-二甲基十六烷基氯化铵）乙酸）丙三醇酯（S1）和（2-十六烷基羧酸酯）丙二羧酸钠（ S2）两种结构相近但极性相反的表面活性剂，研究它们对聚苯乙烯-b-丙烯酸（ PS-b-PAA）在DMF/H2 O混合体系中自组装行为的影响。结果表明，2种表面活性剂均使PS-b-PAA的球形胶束发生了改变，但二者作用的结果不同。随表面活性剂溶液浓度的增大，S1/PS-b-PAA体系的胶束形貌发生由短棒向长棒再到囊泡的转变，形成的棒状胶束长度越来越长（由251 nm→418 nm →1280 nm）；S2/PS-b-PAA体系，胶束形貌发生由球形→较大球形和部分S2的小球形共存→片层和较大球形共存的转变，胶束尺寸逐渐增大（由134 nm→188 nm→1597 nm）。电离后，电荷数量及其烷基链与嵌段共聚物相互作用的差异是导致2种表面活性剂对胶束形貌产生不同影响的原因。
以丙三醇為基體，閤成瞭三（2-（N，N-二甲基十六烷基氯化銨）乙痠）丙三醇酯（S1）和（2-十六烷基羧痠酯）丙二羧痠鈉（ S2）兩種結構相近但極性相反的錶麵活性劑，研究它們對聚苯乙烯-b-丙烯痠（ PS-b-PAA）在DMF/H2 O混閤體繫中自組裝行為的影響。結果錶明，2種錶麵活性劑均使PS-b-PAA的毬形膠束髮生瞭改變，但二者作用的結果不同。隨錶麵活性劑溶液濃度的增大，S1/PS-b-PAA體繫的膠束形貌髮生由短棒嚮長棒再到囊泡的轉變，形成的棒狀膠束長度越來越長（由251 nm→418 nm →1280 nm）；S2/PS-b-PAA體繫，膠束形貌髮生由毬形→較大毬形和部分S2的小毬形共存→片層和較大毬形共存的轉變，膠束呎吋逐漸增大（由134 nm→188 nm→1597 nm）。電離後，電荷數量及其烷基鏈與嵌段共聚物相互作用的差異是導緻2種錶麵活性劑對膠束形貌產生不同影響的原因。
이병삼순위기체，합성료삼（2-（N，N-이갑기십륙완기록화안）을산）병삼순지（S1）화（2-십륙완기최산지）병이최산납（ S2）량충결구상근단겁성상반적표면활성제，연구타문대취분을희-b-병희산（ PS-b-PAA）재DMF/H2 O혼합체계중자조장행위적영향。결과표명，2충표면활성제균사PS-b-PAA적구형효속발생료개변，단이자작용적결과불동。수표면활성제용액농도적증대，S1/PS-b-PAA체계적효속형모발생유단봉향장봉재도낭포적전변，형성적봉상효속장도월래월장（유251 nm→418 nm →1280 nm）；S2/PS-b-PAA체계，효속형모발생유구형→교대구형화부분S2적소구형공존→편층화교대구형공존적전변，효속척촌축점증대（유134 nm→188 nm→1597 nm）。전리후，전하수량급기완기련여감단공취물상호작용적차이시도치2충표면활성제대효속형모산생불동영향적원인。
Two glycerol-based surfactants which had similar structures but oPPosite charge were synthe-sized. The cationic surfactant was N,N-dimethyl-N-(2-oxo-2-((16,16,26,26-tetramethyl-18,24-dioxo-19 ,23-dioxa-16 ,26-diazadotetracontan-16 ,26-diium-21-yl )oxy )ethyl )hePtadecan-1-aminium chloride ( named S1 ),whereas the anionic surfactant was 2-( Palmitoyloxy )malonate disodium salt( named S2 ). The influences of S1 and S2 addition on the self-assembly behavior of Polystyrene-b-Poly( acrylic acid) ( PS-b-PAA)in DMF/H2 O mixtures were investigated. The result showed that both cationic and anionic surfactants can interact with the coPolymer,inducing the morPhological transition. As the concentrations of S1 increased,the aggregates morPhology changed from short rods to longer rods,and from longer rods to vesicles,whereas the morPhology aPPeared bigger sPherical micelles and smaller sPhere of S2 coexist then bigger sPherical micelles and lamellae coexist as the S2 rePlaced S1 . And the lengths of rod-like micelles and vesicles in diameter of S1/PS-b-PAA were statistic by i-TEM,which demonstrated that the sizes of rod-like micelles and vesicles lager at higher S1contents(from 251 nm→418 nm→1 280 nm). The aver-age Particle sizes of S2/PS-b-PAA measured by dynamic light scattering technology,the Particle size of micelles increased with the concentrations of S2 increased( from 134 nm→188 nm→1 597 nm). This re-sulted from the difference between the interactions of their alkyl chains with PS-b-PAA and the difference between the amounts of their ionic charge.
