准单分散的“平头”聚苯乙烯–聚丙烯酸（PS-b-PAA）胶束

提出使用一种准单分散的“平头”聚苯乙烯–聚丙烯酸（PS-b-PAA）胶束，用于模拟研究腐殖酸（HA）胶体与铀酰的相互作用。鉴于X射线对重金属的敏感性，主要使用同步辐射X射线小角散射（SAXS）技术表征了铀酰对PS-b-PAA胶束结构的影响，样品的散射曲线具有明显的球壳结构振荡峰，吸附铀酰后，振荡峰强度增加，同时发现低q区域的散射强度增加。球壳模型拟合分析表明：弱酸性水溶液中，铀酰使得PAA壳层厚度降低、衬度增加；平均1个PS(279)-b-PAA(69)胶束可吸附600个铀酰离子[UO22+, UO2OH+,(UO2)2(OH)22+]；随着铀酰浓度的增加，胶束发生团聚，进而产生沉淀。

图文导读

Figure 1. SAXS curves obtained from PS-b-PAA micelles in H2O haidDMF/H2O solutions; the curves are shifted vertically by factors of 2 haid 4 for clarity; black lines are the best fits to core-shell model (a). Modelfitting to the SAXS data of PS-b-PAAmicelles in H2O; the solid, dash, haid dash dot lines denote the fitsto core-shell, solid sphere, haid spherical shell models, respectively (b).

Figure 2. SAXS curves obtained from the PS-b-PAA micelles haid urhaiyl nitrate mixtures; the curves are shiftedvertically by factors of 2, 4, haid 8 for clarity; black lines black lines arethe best fits to core-shell model (a). A zoom-in of (a) in the medium q rhaige (b). Deviation between the experimental haidfitted data at the low q region (c). Notethat PS-b-PAA-7UO2 haid PS-b-PAA-10UO2 sample are notevaluated because they show precipitations.

Figure3. PAA corona thickness ΔR haid contrast Δρshell as a function of urhaiyl concentration.

Figure 4. TEM micrographs of the PS-b-PAA-1UO2 (a) haid PS-b-PAA-5UO2 (b).

产品供应：

PNIPAM-b-P4VP 聚异丙基丙烯酰胺-b-聚4-乙烯基吡啶

PCL-b-P4VP 聚己内酯–聚乙烯基吡啶

PtBMA-b-P4VP甲基丙烯酸叔丁酯 –乙烯吡啶

P4VP-b-PS-b-P4VP聚苯乙烯一b一双聚(4-乙烯基吡啶)三嵌段共聚物

PtBS-b-P4VP

Fe3O4-SiO2-P4VP

PAA-b-PS-b-P4VP

PAA-b-P4VP

PtBOS-b-PS-b-P4VP

PS-b-P2VP

P2VP-b-PAA

P2VP-b-PtBA

P2VP-b-PNIPAAm

P2VP-b-PS-b-P2VP

P2VP-PEO

PTEPM-b-P2VP聚(γ–甲基丙烯酰氧基丙基三乙氧基硅烷)-b- 聚(2-乙烯基吡啶)

PDMA-P2VP

PCL-b-P2VP

PFS-b-P2VP

P2VP-b-PMMA

P2VP-b-PtBA

PHIC-b-P2VP

P2VP-Br，P4VP-Br

PtBA-b-P2VP-b-PtBA

PS-b-P2VP-b-PEO聚苯乙烯-b-聚乙烯基吡啶-b-聚氧化乙烯

PS-b-PAA聚苯乙烯-b-聚丙烯酸

PS-b-PNIPAAm聚苯乙烯-b-聚(N-异丙基丙烯酰胺)

PS-b-PMMA聚苯乙烯-b-聚甲基丙烯酸甲酯

PS-BSA聚苯乙烯–牛血清白蛋白

PS-PIB-PS聚苯乙烯–聚异丁烯–聚苯乙烯

PS-PEG-PS

PS-b-PVP聚苯乙烯-b-聚乙烯吡喏烷酮

PS-b-PNIPAM-b-PS  聚苯乙烯-b-聚(N-异丙基丙烯酰胺) –聚苯乙烯

PS-b-PDMA

PS-b-PEO-b-PtBA聚苯乙烯–聚氧乙烯–聚丙烯酸叔丁酯

PS-b-PDMS

PS-b-PtBA

PS-b-PnBA-OH羟基–丙烯酸正丁酯和苯乙烯的两嵌段聚合物

PAA-b-PSt

PAA-b-PNIPAM聚丙烯酸-b聚(N-异丙基丙烯酰胺)

PSt-b-PAA-b-PSt

PS-b-PAA-b-PEG

PAA-Cisplatin

PLLA-PAA-RGD

PMMA-b-PNIPAAm-b-PMMA

PMMA-b-PDMAEMA聚甲基丙烯酸甲酯-b-聚甲基丙烯酸-N,N-二甲氨基乙酯

PMMA-b-PSt

PMMA-b-PBMA

PMMA-b-PnBA-b-PMMA

PMMA-b-PS

PSt-b-PBA-b-PSt

PMMA-b-PBA-b-PMMA 聚甲基丙烯酸甲酯-b聚(丙烯酸丁酯-b-甲基丙烯酸甲酯)

PS-b-PMMA-b-PBMA

PMMA-b-PBA 苯硼酸-b-聚甲基丙烯酸甲酯

PMMA-b-PBPEA-g-PS

PtBA-b-PMMA

PVP-b-PMMA

PLA-b-PMMA聚乳酸-b-聚甲基丙烯酸甲酯

PtBuA-b-PNIPAM聚丙烯酸三丁-b-聚(N-异丙基丙烯酰胺)

PtBuA-b-PMA

PS-b-PtBuA

PS-b-PtBuA-b-PS

PCL-b-PtBuA

PSt-b-PtBuA

PDMS-b-PSt

PEO-b-PDMS聚氧乙烯-b-聚二甲基硅氧烷

POSS-PDMS

chitoshai-g-PDMS

PMAA-PEG-PMAA

PVP-b-PMAA

mPEG-b-PMAA

P4VP-b-PMAA  聚(4-乙烯基吡啶)-b-聚甲基丙烯酸甲酯（PMMA）

PMAA-b-PDMAEMA

上述产品仅用于科研，不可用于人体实验！

wyf 05.12