Effects of chain flexibility on the properties of DNA hydrogels.
The effect of chain rigidity on the mechanic properties of DNA hydrogels was studied. Counterintuitively, the hydrogel formed by mainly flexible chains exhibited better stability, stretchability, and much mechanical properties than the hydrogel containing only rigid chains. Calculations showed that the crosslinking ratio in the hydrogel formed by flexible chains was about twice that of the hydrogel formed by rigid chains under the same conditions. We attributed this to the ease of conformational adjustment of flexible chains. Incorporation of 25% rigid chains further improved the performance of DNA hydrogel by shrinking the pore size and tuning its distribution.
Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Bejing 100871, China. dliang@pku.edu.cn.
Wei
W
Pan
Hao
H
Wen
Lin
L
Niu
Cuicui
C
Su
Chenyang
C
Liu
Jiang
J
Zhao
Chengde
C
Mao
Dehai
D
Liang
D004247:DNA / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*
D020100:Hydrogels; D004247:DNA