A Facile method to fabricate double gyroid as a polymer template for nanohybrids

Hsiao Fang Wang, Lv Hong Yu, Xin Bo Wang, Rong Ming Ho

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Here, we suggest a facile method to acquire double gyroid (DG) phase from the self-assembly of chiral block copolymers (BCPs∗), polystyrene-b-poly(l-lactide) (PS-PLLA). A wide region for the formation of DG can be found in the phase diagram of the BCPs∗, suggesting that helical phase (H∗) from the self-assembly of BCPs∗ can serve as a stepping stone for the formation of the DG due to an easy path for order-order transition from two-dimensional to three-dimensional (network) structure. Moreover, the order-order transition from metastable H∗ to stable DG can be expedited by blending the PS-PLLA with compatible entity. Unlike the conventional way for blending BCP with homopolymer, PS-PLLA blends are prepared by using styrene oligomer (S) to fine-tune the morphologies of the blends at which the molecular weight ratio of the S and compatible PS block (r) is less than 0.1. Owing to the use of the low-molecular-weight oligomer, the increase of BCP chain mobility in the blends significantly reduces the transformation time for the order-order transition from H∗ to DG. Consequently, by taking advantage of degradable character of the PLLA, nanoporous gyroid SiO2 can be fabricated using hydrolyzed PS-PLLA blends as a template for sol-gel reaction followed by removal of the PS matrix.

Original languageEnglish
Pages (from-to)7993-8001
Number of pages9
Issue number22
Publication statusPublished - 2014 Nov 25
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry


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