Polyelectrolyte Complex Fiber of Alginate and Poly(diallyldimethylammonium
chloride): Humidity-Induced Shape Memory and Mechanical Transition
Posted on 2020-05-19 - 22:44
In
this work, a polyelectrolyte complex (PEC) fiber of alginate
(ALG) and poly(diallyldimethylammonium chloride) (PDDA) is prepared
by restricting polyelectrolyte complexation with salt to fit wet-spinning
protocol. The ALG/PDDA PEC fiber adsorbs water from the environment
fast and shows a quick mechanical response to humidification. When
the environment humidity is lower than 65%, the fiber performs like
a plastic material, with a modulus of ∼109 Pa. As
the humidity increases above 65%, the fiber exhibits a sharp plastic–rubber
transition with a significant modulus drop to ∼106 Pa. After the rubber plateau is reached, the modulus continues to
decline when further increasing humidity. Furthermore, the ALG/PDDA
fiber presents a humidity-induced shape memory effect. The humidity-adaptive
behaviors of ALG/PDDA have potential for different applications, such
as actuation and sensing.
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Huang, Wentao; Li, Jiefu; Liu, Dezhong; Tan, Shuaixia; Zhang, Pengfei; Zhu, Liping; et al. (2020). Polyelectrolyte Complex Fiber of Alginate and Poly(diallyldimethylammonium
chloride): Humidity-Induced Shape Memory and Mechanical Transition. ACS Publications. Collection. https://doi.org/10.1021/acsapm.0c00056
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AUTHORS (7)
WH
Wentao Huang
JL
Jiefu Li
DL
Dezhong Liu
ST
Shuaixia Tan
PZ
Pengfei Zhang
LZ
Liping Zhu
SY
Shuguang Yang