Polyelectrolyte Complex Fiber of Alginate and Poly(diallyldimethylammonium chloride): Humidity-Induced Shape Memory and Mechanical Transition

Huang, Wentao; Li, Jiefu; Liu, Dezhong; Tan, Shuaixia; Zhang, Pengfei; Zhu, Liping; Shen, Yang

doi:10.1021/acsapm.0c00056

Cited by 24 publications

(16 citation statements)

References 58 publications

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“…The dissipation factor, tan(δ), increased with increasing humidity. Taken together, this behavior can be attributed to the plasticizing effect of water in PECs. ,,, A similar observation was made by Huang et al for alginate/PDADMA complex fiber, wherein E ′ decreased and tan(δ) increased beyond 40% RH …”

Section: Results and Discussionsupporting

confidence: 77%

“…Aqueous solutions of oppositely charged polyelectrolytes (PEs) phase separate upon mixing, leading to the formation of a dilute supernatant and a polymer-rich phase known as a polyelectrolyte complex (PEC). PECs are formed due to electrostatic attractions between oppositely charged PEs and the entropic release of counterions and water. − PECs can exist as solid-like complexes or liquid-like coacervates, − and the physical properties are affected by salt, temperature, water, pH, and hydrophobicity of the PEs. − This leads to applications of PECs in drug delivery systems, humidity sensors, separation membranes, electrochemistry, and many more. − However, there is little information regarding the impact of complexation pH and water content on the mechanical properties and relaxation of PECs.…”

Section: Introductionmentioning

confidence: 99%

“…Water acts as a plasticizer in solid-like PECs and facilitates its relaxation from a glassy state to a rubbery state . For example, Huang et al observed four different regions of mechanical behavior: glassy, transitional, rubbery, and terminal by varying the water content within PEC fibers composed of alginate and PDADMA .…”

Section: Introductionmentioning

confidence: 99%

“…5,6,17,19−21 Water acts as a plasticizer in solid-like PECs and facilitates its relaxation from a glassy state to a rubbery state. 11 mechanical behavior: glassy, transitional, rubbery, and terminal by varying the water content within PEC fibers composed of alginate and PDADMA. 11 The same four regions of mechanical behavior were observed separately by Akkaoui et al in performing time−temperature superposition (TTS) on entangled PECs.…”

Section: ■ Introductionmentioning

confidence: 99%

“…11 mechanical behavior: glassy, transitional, rubbery, and terminal by varying the water content within PEC fibers composed of alginate and PDADMA. 11 The same four regions of mechanical behavior were observed separately by Akkaoui et al in performing time−temperature superposition (TTS) on entangled PECs. 20 This suggests that time, temperature, and water may be equivalent in PECs.…”

Section: ■ Introductionmentioning

confidence: 99%

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Relaxation Times of Solid-like Polyelectrolyte Complexes of Varying pH and Water Content

et al. 2021

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The effect of complexation pH and water on the relaxation time and dynamics of polyelectrolyte (PE) complexes (PECs) and coacervates remains poorly understood. Here, we describe the dynamic mechanical behavior of solid-like PECs containing weak PEs poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) at varying complexation pH, relative humidity, and temperature with support from molecular dynamics simulations. Time−temperature, time−water, and time−intrinsic ion pair superposition principles are applied to obtain the relaxation times. It is shown that the natural log of relaxation time in hydrated PAH/PAA PECs is inversely proportional to the volume fraction of water (ln τ ∼ ϕ w −1) for a given complexation pH. For all complexation pH values examined, the natural log of relaxation time collapsed into a single line when plotted against the ratio of the number of intrinsic ion pairs to water molecules (ln (τ) ∼ n intrinsic ion pairs /n water ). Taken together, this suggests that the relaxation of solid-like, hydrated PAH/PAA PECs is mediated by bound water at the intrinsic ion pair.

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Section: Results and Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Relaxation Times of Solid-like Polyelectrolyte Complexes of Varying pH and Water Content

et al. 2021

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Moisture‐Driven Actuators

Tang,

Zhao,

Liu

et al. 2024

Adv Funct Materials

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Water constitutes a huge circulation network in solid, liquid and gaseous forms that contains inestimable recyclable energy. Obtaining energy from gaseous moisture is challenging but of great significance to promote the energy upgrading. The emergence of moisture‐driven actuator (MDA) provides an effective way in converting moisture energy to mechanical energy. The MDA can combine with water molecules through hygroscopicity and swell to produce macroscopic deformation. Due to the wide distribution of humidity and the wireless driving mode, MDA shows great application potential in the fields of environmental monitoring, remote control and energy harvesting. This paper comprehensively reviews the research progress of MDA from aspects of hydrophilic materials, structures, preparing methods, multi‐response integration and applications, aiming at providing guidance for the design, preparation and application of MDA. Besides, the challenges faced by MDA are analyzed and corresponding solutions are proposed, which points out the next stage developing direction of MDA.

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Alginate/Chitosan Complex Fibers Reinforcement and Their Mechanical Transition Continuum With Water Uptake Increasing

Huang,

Liu,

Jian

et al. 2024

Macromol. Rapid Commun.

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Living tissues span a remarkable spectrum of modulus ranging from the level of Pa to GPa in a water‐rich environment. Constructing soft and hard materials that match the mechanics of tissues and researching mechanical transition in water, are beneficial for their biological applications. Here, using polyelectrolyte complex fiber as a model system and reinforcing the fiber by stepwisely introducing additional coordination and covalent bonds, this investigated that the water effect on mechanical transition behaviors. Alginate/chitosan fiber (AC fiber) has a single electrostatic bond and shows continuous mechanical transition containing a glassy state, rubbery state, and terminal relaxation (initial modulus lower than 10 MPa) in aqueous solution. Alginate/chitosan/calcium fiber (ACC fiber) has both electrostatic and coordination bonds, which shows the behavior of hard rubber (initial modulus 100 MPa) when water reaches equilibrium. Alginate/chitosan/calcium/polydopamine fiber (ACCP fiber) with triple bonds, including electrostatic, coordination, and covalent bonds, exhibits the behavior like ductile plastics in aqueous solution (initial modulus 1000 MPa). This work not only provides important insight into the toughening mechanism of polyelectrolyte complexes in water but also contributes to the preparation of tissue adaptive implantations.

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Polyelectrolyte Complex Fiber of Alginate and Poly(diallyldimethylammonium chloride): Humidity-Induced Shape Memory and Mechanical Transition

Cited by 24 publications

References 58 publications

Relaxation Times of Solid-like Polyelectrolyte Complexes of Varying pH and Water Content

Relaxation Times of Solid-like Polyelectrolyte Complexes of Varying pH and Water Content

Moisture‐Driven Actuators

Alginate/Chitosan Complex Fibers Reinforcement and Their Mechanical Transition Continuum With Water Uptake Increasing

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