A novel self-assembled hybrid organogel of polypeptide-based block copolymers with inclusion of polypeptide-functionalized graphene†,RSC Advances

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A novel self-assembled hybrid organogel of polypeptide-based block copolymers with inclusion of polypeptide-functionalized graphene†
RSC Advances ( IF 3.9 ) Pub Date : 2017-01-05 00:00:00 , DOI: 10.1039/c6ra24677j
Wei-Wei Lei _{1,

2,

3,

4,

5} , Ling-Ying Shi _{1,

2,

3,

4,

5} , Hang Li _{1,

2,

3,

4,

5} , Chen-Xi Li _{1,

2,

3,

4,

5} , Yong-Fu Diao _{1,

2,

3,

4,

5} , Yu-Lin Zhang _{1,

2,

3,

4,

5} , Rong Ran _{1,

2,

3,

4,

5}

Affiliation

Self-assembled hybrid organogels of polypeptides containing block copolymers with the inclusion of polypeptide-functionalized graphene were designed and elaborately prepared, and showed interesting microstructures as well as enhanced mechanical performances. Firstly, a series of peptide-based triblock copolymers (triBCPs), poly(γ-benzyl-L-glutamate)-b-poly-(dimethylsiloxane)-b-poly(γ-benzyl-L-glutamate) (PBLG-b-PDMS-b-PBLG, BDB), with different lengths of PBLG helices, were synthesized and characterized. As the length of the PBLG helices increased, the critical gelation concentration of the BDB triBCPs decreased while the gel–sol transition temperature increased. Moreover, the PBLG covalently modified graphene oxide (GO) sheets were successfully incorporated into the BDB organogels in toluene and hybrid organogels were prepared. In the presence of GO sheets, the minimum gelation concentration of the hybrid organogel was slightly lowered, and the hybrid organogels preserved thermoreversibility. In the hybrid gels, the triBCPs still self-assembled into nanoribbon structures and the functionalized GO sheets were well dispersed in the gel medium, which was obviously observed by transmission electron microscopy. In addition, the inclusion of the functionalized graphene greatly enhanced the mechanical performance of the hybrid gels, which was demonstrated by the significant increase of the moduli and the fracture stress of the hybrid gels compared with the corresponding native gels in the rheology experiments.

中文翻译：

一种新型的基于多肽的嵌段共聚物的自组装杂化有机凝胶，其中包含多肽功能化的石墨烯†

设计并精心制备了包含嵌段共聚物的多肽的自组装杂化有机凝胶，其中包括嵌段共聚物，该杂化有机凝胶包含了多肽功能化的石墨烯，并显示出令人感兴趣的微观结构以及增强的机械性能。首先，一系列基于肽的三嵌段共聚物（triBCPs），聚（γ苄基的大号-谷氨酸） - b -聚（二甲基硅氧烷） - b -聚（γ苄基大号-谷氨酸）（PBLG- b -聚二甲基硅氧烷合成并表征了具有不同长度的PBLG螺旋的-PBLG，BDB）。随着PBLG螺旋长度的增加，BDB triBCP的临界胶凝浓度降低，而凝胶-溶胶转变温度升高。此外，将PBLG共价改性的氧化石墨烯（GO）片材成功地掺入了甲苯中的BDB有机凝胶中，并制备了杂化有机凝胶。在GO片材的存在下，杂化有机凝胶的最小胶凝浓度略有降低，并且杂化有机凝胶保持了热可逆性。在杂化凝胶中，triBCP仍然自组装成纳米带结构，功能化的GO片材很好地分散在凝胶介质中，这在透射电子显微镜下很明显。此外，

更新日期：2017-01-05

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