Reversible Swelling–Shrinking Behavior of Hydrogen-Bonded Free-Standing Thin Film Stabilized by Catechol Reaction

Sun, Jiaxing; Su, Chao; Zhang, Xuejian; Yin, Wenjing; Xu, Jie; Shen, Yang

doi:10.1021/la5048479

Cited by 37 publications

(33 citation statements)

References 59 publications

(122 reference statements)

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“…For the selected coatings, orientation will be determined using FTIR measurements and by using two different quantication methods. As the used polymers (PVA, PEO, PVP and CS) have different potentials to establish hydrogen bonding interactions, [35][36][37][38][39][40] the obtained results will allow to investigate the effect of different levels of interactions of polymers and nanoclay through the study of the properties of the coatings such as density and oxygen permeability as well as nanoclay dispersion. The experimental results will be then compared with permeability models and a modication of some of those models will be discussed.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoclay orientation on oxygen barrier properties of LbL nanocomposite coated films

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Effect of nanoclay orientation on oxygen barrier properties of LbL nanocomposite coated films

et al. 2019

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“…This can be also reflected by the big changes in frequency and dissipation as shown in Figure (b). One possible reason is that the PAADopa‐Zn shows a more compact structure due to the electrostatic interactions between Zn and PAA along with the coordination between the Zn and Dopa group, while PEI is more hydrophilic due to the presence of amine groups and it swells strongly when overcompensates the previously adsorbed PAA layer.…”

Section: Resultsmentioning

confidence: 99%

“…However, little work was reported about forming compact structure without using the oxidizing chemistry. The question addressed in this study is whether compact Dopa‐containing multilayers could be built with weak interactions such as hydrogen bonding, electrostatic and coordination interactions under acidic pH . A common phenomenon described as the “odd‐even effect” is usually observed during the layer‐by‐layer assembling when two polymers show different swollen capabilities .…”

Section: Introductionmentioning

confidence: 99%

Odd‐even effect during layer‐by‐layer assembly of polyelectrolytes inspired by marine mussel

Wang

Han

et al. 2016

J Polym Sci B Polym Phys

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Biomimetic polyelectrolyte of Dopa modified poly(acrylic acid) (PAADopa) was synthesized taking advantage of Dopa, the major unit of marine adhesive proteins. Zinc crosslinked PAADopa (PAADopa‐Zn) were formed at acidic pH for more compact structure and assembled with the positively charged polyethylenimine (PEI) to build robust polyelectrolyte multilayers at high salt concentration. Effects of pH, crosslinking degree, and salt concentration on polymer structure, film building process, and morphology were investigated, respectively. An “odd‐even” effect was observed by quartz crystal microbalance with dissipation and AFM in the presence of zinc ion, which becomes more obvious with an optimum crosslinking degree (Zn/Dopa = 2.0) under high salt concentration (0.6 M NaCl). It indicates the different swollen properties of PEI chain and PAADopa‐Zn complexes during the layer‐by‐layer building process under optimum crosslinking degree of PAADopa‐Zn at high salt concentration. Such odd‐even phenomenon of the biocompatible system is of critical importance for understanding the mechanism of layer formation and film structures. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2017, 55, 245–255

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“…NaOH is deliberately added into the solution to break hydrogen bonds between PAA and PEO. 27,28 Due to the restriction of hydrogen bonding, the solution is homogeneous and the viscosity is fit for the spinning process. 29 The solution is extruded into a 0.1 M HCl solution.…”

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confidence: 99%

Highly Elastic Fibers Made from Hydrogen-Bonded Polymer Complex

Wang

Nie

et al. 2016

ACS Macro Lett.

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In this letter, we put forward an approach to prepare hydrogen-bonded complex fibers. First, a spinnable fluid is obtained by restricting hydrogen bonds, and then it is extruded through a spinneret into a coagulation bath where hydrogen bonds are built to induce fiber formation. The hydrogen-bonded poly(acrylic acid)/poly(ethylene oxide) (PAA/PEO) complex was prepared into fibers. PAA/PEO fiber shows excellent elastic behavior and can be drawn to more than 12× its original length without breaking, which is much higher than Spandex fiber or natural rubber fiber. In the fiber, PAA and PEO are miscible in the molecular level. Dynamic hydrogen bonding between PAA and PEO restricts the crystallization of PEO, retains flexibility of polymer chains, and also provides recovery forces when removing stress. E lastomers and highly elastic materials are essential to human life. 1−6 The polymeric materials that can be used as elastomers should have flexible polymer chains, weak abilities for crystallization, relatively low glass transition temperatures, and mechanisms for cross-linking. 7 Polybutadiene has a flexible chain, but without vulcanization it is gummy, easy for oxidation, and does not show resiliencies. 8 Polysiloxane has a pliable chain, and the cross-linking of siloxane elastomers is obtained by cohydrolysis of dichlorosilanes with alkyl-trichlorosilanes. 9,10 Polyurethane is composed of soft and hard segments. The soft segments make the polymer show a high elongation, while hard segments are hydrogen-bonded tie-points that ensure the recovery force. 11,12 Low-dimensional elastic materials, such as fibers and thin films, are essential for developing the flexible electronics and intelligent wearable products. 13,14 Traditional elastomers, such as natural rubber and polyurethane, are exploited to make functional flexible fibers and films. 15−18 In this work, we report a new elastic fiber that is made from the hydrogen-bonded polymer complex of poly(acrylic acid) (PAA) and poly(ethylene oxide) (PEO). PAA is an amorphous polymer and its glass transition temperature is around 100°C. PEO has flexible chain and relatively low glass transition temperature, but PEO is easy to crystallize. Neither PAA nor PEO shows elastic behavior under ambient conditions. However, through hydrogen-bonding complexation, the PAA/ PEO system shows elastic behavior. For example, Hammond et al. applied layer-by-layer (LbL) assembly to fabricate a hydrogen-bonded PAA/PEO film which is flexible and could be stretched up to 450%. 19 LbL assembly is a controlled polymer complexation process at interfaces. Many hydrogen-bonded polymer complex systems have been prepared as thin films, coatings, and capsules with LbL assembly. 20−26 Here we put forward an approach to prepare hydrogen-bonded complex fibers. First, a spinnable fluid is obtained by restricting hydrogen bonds and then it is extruded through a spinneret into a coagulation bath where hydrogen bonds are built and the fiber is formed (Figure 1a). NaOH is deliberately added into the solutio...

show abstract

Reversible Swelling–Shrinking Behavior of Hydrogen-Bonded Free-Standing Thin Film Stabilized by Catechol Reaction

Cited by 37 publications

References 59 publications

Effect of nanoclay orientation on oxygen barrier properties of LbL nanocomposite coated films

Effect of nanoclay orientation on oxygen barrier properties of LbL nanocomposite coated films

Odd‐even effect during layer‐by‐layer assembly of polyelectrolytes inspired by marine mussel

Highly Elastic Fibers Made from Hydrogen-Bonded Polymer Complex

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