Citation: Shi Ce, Xi Shixia, Han Yingchun, Zhang Hao, Liu Jingsheng, Li Yunqi. Structure, rheology and electrospinning of zein and poly(ethylene oxide) in aqueous ethanol solutions[J]. Chinese Chemical Letters, ;2019, 30(2): 305-310. doi: 10.1016/j.cclet.2018.07.010 shu

Structure, rheology and electrospinning of zein and poly(ethylene oxide) in aqueous ethanol solutions

Shi Ce ^a,c,1 ,
Xi Shixia ^a,b,1 ,
Han Yingchun ^a,d ,
Zhang Hao ^b,**, ,
Liu Jingsheng ^b ,
Li Yunqi ^a,d,*,

a.
Key Laboratory of High-Performance Synthetic Rubber and its Composite Materials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
College of Food Science and Engineering, National Engineering Laboratory for Wheat and Corn Deep Processing, Jilin Agricultural University, Changchun 130118, China
c.
University of Chinese Academy of Sciences, Beijing 100049, China
d.
University of Science and Technology of China, Hefei 230026, China

zhanghao@ciac.ac.cn

yunqi@ciac.ac.cn

Received Date: 30 May 2018
Revised Date: 11 July 2018
Accepted Date: 13 July 2018
Available Online: 3 February 2018

Figures(4)

Electrospun fiber mats (EFM) integrated proteins and biocompatible polymers have been widely used as tissue scaffold, wound dressing and food packaging. The morphology of EFM has strong correlation with the structure and rheology of the solutions. We studied the structure and rheology of polyethylene oxide (PEO) and zein in 80% ethanol aqueous solutions and the resulted EFM. In solutions, zein with rod-like conformation tends to aggregate and form oligomer, the number of proteins in the oligomer spans from 2.5 to 55.2, while PEO always behaves like Gaussian chain in good solvent. Zein preferred to distribute along PEO chains in their mixed solutions, and the structures decomposed from small angle X-ray scattering have consistent relaxation spatial-temporal characteristics with rheological behaviors. Further, the aging of zein solutions enhanced shear thinning and resulted thicker fibers in EFM, which are attributed to the rod-like growth of zein aggregates. Aggregates in viscous media with long enough relaxation time are probably crucial for the formation of continuous electrospun fibers or ribbons. This study provides a clear correlation of the structure, rheology of solutions with the morphologies of EFM made up of proteins and polymers.
- Small angle X-ray scattering,
- Zein,
- Poly(ethylene oxide),
- Viscosity,
- Electrospin
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