Bioinspired Programmable Polymer Gel Controlled by Swellable Guest Medium

Deng, Heng; Dong, Yuan; Su, Jheng‐Wun; Zhang, Cheng; Xie, Yunchao; Maschmann, Matthew R.; Lin, Yuyi; Lin, Jian

doi:10.1021/acsami.7b07837

Cited by 42 publications

(38 citation statements)

References 44 publications

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“…This is typically done by embedding non‐swellable (or less swellable) fillers into a swellable polymeric matrix . Interestingly, researchers have recently created a self‐folding composite film through the opposite strategy; they incorporated swellable cyclopentanone as the guest into a non‐swellable polymer host …”

Section: Figurementioning

confidence: 60%

A Self‐Folding Polymer Film Based on Swelling Metal–Organic Frameworks

et al. 2018

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Herein, we exploit the well-known swelling behaviour of metal-organic frameworks (MOFs) to create a self-folding polymer film. Namely, we show that incorporating crystals of the flexible MOF MIL-88A into a polyvinylidene difluoride (PVDF) matrix affords a polymer composite film that undergoes reversible shape transformations upon exposure to polar solvents and vapours. Since the self-folding properties of this film correlate directly with the swelling properties of the MIL-88A crystals, it selectively bends to certain solvents and its degree of folding can be controlled by controlling the relative humidity. Moreover, it shows a shape-memory effect at relative humidity values from 60 % to 90 %. As proof of concept, we demonstrate that these composite films can lift cargo and can be used to assemble 3D structures from 2D patterns. Our strategy is a straightforward method for designing autonomous soft materials with folding properties that can be tuned by judicious choice of the constituent flexible MOF.

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Section: Figurementioning

confidence: 60%

A Self‐Folding Polymer Film Based on Swelling Metal–Organic Frameworks

et al. 2018

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“…[21] One attractive approach is the fabrication of composite materials in which guest and host components differ in their respective swelling capacity.T his is typically done by embedding non-swellable (or less swellable) fillers into aswellable polymeric matrix. [23] Herein, we report the development of anew type of selffolding composite films fabricated by integrating flexible MOF crystals as fillers into ap assive polymer matrix. [23] Herein, we report the development of anew type of selffolding composite films fabricated by integrating flexible MOF crystals as fillers into ap assive polymer matrix.…”

mentioning

confidence: 99%

“…[22] Interestingly,researchers have recently created as elf-folding composite film through the opposite strategy;t hey incorporated swellable cyclopentanone as the guest into an on-swellable polymer host. [23] Herein, we report the development of anew type of selffolding composite films fabricated by integrating flexible MOF crystals as fillers into ap assive polymer matrix. Note that this type of composite films are known as mixed matrix membranes in separation processes.…”

mentioning

confidence: 99%

A Self‐Folding Polymer Film Based on Swelling Metal–Organic Frameworks

et al. 2018

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Herein, we exploit the well-known swelling behaviour of metal-organic frameworks (MOFs) to create as elffolding polymer film. Namely,w es howt hat incorporating crystals of the flexible MOF MIL-88A into ap olyvinylidene difluoride (PVDF) matrix affords ap olymer composite film that undergoes reversible shape transformations upon exposure to polar solvents and vapours.S ince the self-folding properties of this film correlate directly with the swelling properties of the MIL-88A crystals,i ts electively bends to certain solvents and its degree of folding can be controlled by controlling the relative humidity.M oreover,i ts hows as hapememory effect at relative humidity values from 60 %t o9 0%. As proof of concept, we demonstrate that these composite films can lift cargo and can be used to assemble 3D structures from 2D patterns.O ur strategy is as traightforwardm ethod for designing autonomous soft materials with folding properties that can be tuned by judicious choice of the constituent flexible MOF.Among the most fascinating properties of certain metalorganic frameworks (MOFs) is their structural flexibility in response to external stimuli. Contrary to rigid crystalline porous materials (e.g.z eolites or aluminophosphates), the highly ordered networks of flexible MOFs,also known as soft porous crystals, [1] can undergo reversible dynamic structural transformations. [2] This flexibility arises from the reversible nature of the coordination bonds and weaker supramolecular interactions within MOFs,w hich allow for conformational changes of secondary building units and organic linkers.Over the past decade,this intriguing aspect of MOF chemistry has been investigated, leading to the discovery of numerous structural-transition phenomena, including thermal expansion, [3] linker rotation, [4] and subnetwork displacement. [5] Among the most interesting of flexible MOFs are swelling MOFs,w hich undergo expansion or contraction owing to adsorption or desorption, respectively. [6] Ap rime example is the isoreticular Fe III dicarboxylate MIL-88 family (MIL = Materials from Institute Lavoisier), in which the MOF unitcell volume exhibits reversible enlargement upon adsorption of polar solvent molecules owing to the formation of hydrogen bond interactions between guest molecules and the framework. [7] In these MOFs,t he swelling can be strongly influenced by the solvent and by the functional groups in the linkers. [8] Beyond molecular-level changes,aremarkable effect of such lattice swelling is the subsequent macroscopic deformation of the crystals. [8b] Our group considered that the aforementioned phenomenon had been overlooked in the development of functional materials,sowebegan to reflect on how such swelling might be exploited to develop novel soft materials capable of reversible shape transformations.I nt his regard, self-folding materials,which are able to translate external stimuli such as thermal, light, electrical, or chemical energy into useful and predictable shape transformations,are garnering attention for their po...

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“…91,93,94 For the first time, Su et al fully explored the 4D printing potential of a commercial self-morphing polymer, SU-8, previously developed by the same group. 95,96 They allowed the polymers deformed temporally to be fixed by vitrification or crystallization of the polymer chains, and to return to their original shape under an external stimulus through spatial control of the swelling medium (cyclopentanone) inside the polymer matrix. 96 By doing so, the authors created passive and active regions within the polymers that control the self-morphing processes to form different geometries following stimuli.…”

Section: D Bioprinting-a New Directionmentioning

confidence: 99%

Tissue Engineering and Regenerative Medicine 2019: The Role of Biofabrication—A Year in Review

Ramos

Moroni

2020

Tissue Engineering Part C: Methods

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Despite its relative youth, biofabrication is unceasingly expanding by assimilating the contributions from various disciplinary areas and their technological advances. Those developments have spawned the range of available options to produce structures with complex geometries while accurately manipulating and controlling cell behavior. As it evolves, biofabrication impacts other research fields, allowing the fabrication of tissue models of increased complexity that more closely resemble the dynamics of living tissue. The recent blooming and evolutions in biofabrication have opened new windows and perspectives that could aid the translational struggle in tissue engineering and regenerative medicine (TERM) applications. Based on similar methodologies applied in past years' reviews, we identified the most high-impact publications and reviewed the major concepts, findings, and research outcomes in the context of advancement beyond the state-of-the-art in the field. We first aim to clarify the confusion in terminology and concepts in biofabrication to therefore introduce the striking evolutions in three-dimensional and four-dimensional bioprinting of tissues. We conclude with a short discussion on the future outlooks for innovation that biofabrication could bring to TERM research.

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Bioinspired Programmable Polymer Gel Controlled by Swellable Guest Medium

Cited by 42 publications

References 44 publications

A Self‐Folding Polymer Film Based on Swelling Metal–Organic Frameworks

A Self‐Folding Polymer Film Based on Swelling Metal–Organic Frameworks

A Self‐Folding Polymer Film Based on Swelling Metal–Organic Frameworks

Tissue Engineering and Regenerative Medicine 2019: The Role of Biofabrication—A Year in Review

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