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Uniform Polyselenophene Block Copolymer Fiberlike Micelles and Block Co-micelles via Living Crystallization-Driven Self-Assembly
Macromolecules ( IF 5.1 ) Pub Date : 2018-01-19 00:00:00 , DOI: 10.1021/acs.macromol.7b02317
Emily L. Kynaston 1 , Ali Nazemi 1 , Liam R. MacFarlane 1 , George R. Whittell 1 , Charl F. J. Faul 1 , Ian Manners 1
Affiliation  

We report the formation of near uniform block copolymer fiberlike micelles of controlled length with a crystalline polyselenophene core via the seeded growth process termed living crystallization-driven self-assembly (CDSA). Poly(3-decylselenophene)-block-poly(dimethylsiloxane) (P3DSe-b-PDMS) forms long, fiberlike micelles in selective solvents. Attempts to control the length of these fibers by seeded growth following sonication to form the seeds afforded samples with lengths limited to ca. 300 nm. However, we found that direct dispersion of P3DSe-b-PDMS in diethyl ether yields short and relatively low-dispersity nanofibers (Ln = 41 nm; Lw/Ln = 1.16) which can be used as seeds. In this case, seeded growth led to low-dispersity fibers with length control up to ca. 900 nm. Moreover, we demonstrate that block co-micelles with spatially distinct PDMS and polystyrene (PS) coronal segments can be accessed from the sequential addition of dissolved P3DSe-b-PS to preformed P3DSe-b-PDMS micelles.

中文翻译:

通过活性结晶驱动的自组装形成均匀的聚硒烯嵌段共聚物纤维状胶束和胶束胶束

我们报道了通过称为活性结晶驱动自组装(CDSA)的种子生长过程,形成了具有可控长度的,具有结晶聚硒烯核的近乎均匀的嵌段共聚物纤维状胶束。聚(3- decylselenophene) -嵌段-聚(二甲基硅氧烷)(P3DSe- b -PDMS)形式长,纤维样在选择性溶剂中的胶束。尝试通过在超声处理以形成种子之后通过种子生长来控制这些纤维的长度,从而提供了长度限于约3μm的样品。300纳米 但是,我们发现P3DSe- b -PDMS直接分散在乙醚中会产生短而分散度相对较低的纳米纤维(L n = 41 nm;L w / L n= 1.16),可以用作种子。在这种情况下,种子的生长会导致低分散性纤维,其长度控制最高达约。900 nm。此外,我们证明,可以通过将溶解的P3DSe- b -PS顺序添加到预先形成的P3DSe- b -PDMS胶束中来访问具有空间上不同的PDMS和聚苯乙烯(PS)冠状链段的嵌段胶束。
更新日期:2018-01-19
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