Design of a mechanically strong and highly stretchable thermoplastic silicone elastomer based on coulombic interactions

Shi, Jinfeng; Zhao, Na; Yan, Dong-Ying; Song, Jianhui; Fu, Wenxin; Li, Zhibo

doi:10.1039/d0ta01593h

Cited by 55 publications

(41 citation statements)

References 49 publications

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“…Very recently, Shi et al [163] 2020, prepared thermoplastic silicone elastomers (TPSEs) via coulombic cross-linking interactions between zinc oxide (ZnO) and carboxylic acid groups on the polydimethylsiloxane (PDMS) side chains ( Figure 14). The authors achieved an ideally anticipated combination of excellent mechanical and self-healing properties through the catalytic ring-opening reaction of three linear vinyl-containing PDMS polymers with trimeric phosphazene base (CTPB).…”

Section: Ionic Interaction In Self-healing Materialsmentioning

confidence: 99%

Design Principles of Interfacial Dynamic Bonds in Self‐Healing Materials: What are the Parameters?

Sattar

Patnaik

2020

Chemistry An Asian Journal

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Polymers and polymer nanocomposites (PNCs) are extensively used in daily life. However, the growing requirement of advanced PNCs laid persistent environmental issues due to deformation‐induced damage that once formed, does not vanish at future stages. Therefore, self‐healing materials with significantly enhanced long life and safety have been designed to epitomize the forefront of recent advances in materials chemistry and engineering. Self‐healing PNC (SH‐PNCs) materials are a class of smart composites in which nanoparticles induce interfacial reconstruction via multiple covalent and non‐covalent interactions culminating in improved mechanical strength and self‐healing capability. However, since the filler nanoparticles are independent of the reversible supramolecular network, the filler incorporation destroys the self‐healing ability but could enhance the mechanical strength. Hence, the molecular parameters controlling the alliance of robust mechanical strength with virtuous self‐healing ability is a crucial challenge. Herein, we review the latest developments that have been made in self‐healing materials and puts advancing insights into the fabrication of SH‐PNCs in which the combination of covalent bonds and non‐covalent interactions provides an optimal balance between their mechanical performance and self‐healing capability. We highlight the importance of specific entropic, enthalpic changes, polymer chain conformations and flexibility that enable the reconstruction of damaged surface and physical reshuffling of dynamic bonds at the interface of cut surfaces.

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Section: Ionic Interaction In Self-healing Materialsmentioning

confidence: 99%

Design Principles of Interfacial Dynamic Bonds in Self‐Healing Materials: What are the Parameters?

Sattar

Patnaik

2020

Chemistry An Asian Journal

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“…Hence, it is desirable to develop silicone materials with self‐healing and recyclable ability, which can prolong the materials lifetime and reduce the energy wastes. [ 8,9 ] Recently, many efforts have been made to fabricate intrinsic self‐healing PDMS materials based on various reversible bonds, such as hydrogen bonds, [ 10,11 ] π–π stacking, [ 12 ] metal coordination, [ 13–15 ] ionic interactions, [ 16 ] Diels‐Alder reaction, [ 17,18 ] disulfide exchange, [ 19,20 ] and imine bonds. [ 21,22 ] Among them, the imine bond can be simply constructed by Schiff‐base reaction between amino and aldehyde groups under mildness condition and shows dynamic property for self‐healing and reprocessability without external stimuli.…”

Section: Figurementioning

confidence: 99%

Self‐Healable and Transparent Elastomers Based on Dual Reversible Networks

Wang

Yang

Sun

et al. 2020

Macro Materials & Eng

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The fabrication of silicon elastomer with good mechanical properties and self‐healing ability is still a challenge. Herein, a facile method to fabricate a transparent healable double‐network (DN) elastomer by introducing polyborosiloxane (PBS) into self‐healing polydimethylsiloxane (HPDMS) networks is demonstrated. Tensile testing shows that the mechanical properties of PBS and HPDMS are both improved. The DN elastomer shows high transparency across the visible spectrum with an average transmittance of 75%. Because of the breakage and reconstruction of reversible imine bonds and BO dative bonds, the elastomer exhibits excellent self‐healing properties with a maximum healing efficiency of 98% at room temperature. Meanwhile, the elastomer can be repeatedly reprocessed with a recovery of 85% of virgin mechanical strengths. This work provides a new insight to design transparent, self‐healing silicone elastomers with a simple and eco‐friendly method.

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“…[35][36][37][38] Rational design of functional polysiloxanes, by placing various dynamic bonds on the polymeric backbone, as side groups or terminal groups, is critical to achieve flexible adjustment of mechanical properties and dynamic capacities, thus meeting different demands in reality. Over the past decade, numerous dynamic silicone materials based on supramolecular interactions (hydrogen bond, [37,39,40] coordination, [29,38,[41][42][43][44] 𝜋-𝜋 stacking, [45,46] ionic bond, [47][48][49] host-guest interaction, [50] etc.) or dynamic covalent bonds (disulfide exchange, [51,52] imine exchange, [35,53,54] transesterification, [55][56][57][58] siloxane exchange, [34,59] etc.)…”

Section: Introductionmentioning

confidence: 99%

Mechanically Strong, Autonomous Self‐Healing, and Fully Recyclable Silicone Coordination Elastomers with Unique Photoluminescent Properties

Zhao

Wang

Xie³

et al. 2021

Macromol. Rapid Commun.

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The combination of excellent mechanical performances, high reprocess efficiency, and wide-range tunability for functional dynamic siloxane materials is a challenging subject. Herein, the fabrication of mechanically strong, autonomous self-healing, and fully recyclable silicone elastomers with unique photoluminescent properties by coordination of poly(dimethylsiloxane) (PDMS) containing coordination bonding motifs with Zn 2+ ions is reported. Salicylaldimine groups, which are introduced into the polysiloxane backbone via mild Schiff-base reaction, coordinate with zinc ions to form elastomeric networks The obtained supramolecular elastomers have excellent mechanical properties, with the optimized tensile strength up to 10.0 MPa, which is unprecedented among the reported thermoplastic polysiloxane-based elastomers. Both mechanical properties and stress relaxation kinetics are tunable via adjusting the length of PDMS segments or the molar ratio of metal versus salicylaldimine. Furthermore, these elastomers can be conveniently healed and recycled to regain their original mechanical properties and integrity under mild conditions. In addition, this new kind of polysiloxane also exhibits coordination-enhanced fluorescence, showing great promise for preparing photoluminescent elastomers or coatings.

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Design of a mechanically strong and highly stretchable thermoplastic silicone elastomer based on coulombic interactions

Abstract: A thermoplastic silicone elastomer exclusively based on the salt-bonding between COOH and ZnO was successfully prepared, exhibiting excellent mechanical properties, high stretchability and temperature-assisted self-healing ability.

Cited by 55 publications

References 49 publications

Design Principles of Interfacial Dynamic Bonds in Self‐Healing Materials: What are the Parameters?

Design Principles of Interfacial Dynamic Bonds in Self‐Healing Materials: What are the Parameters?

Self‐Healable and Transparent Elastomers Based on Dual Reversible Networks

Mechanically Strong, Autonomous Self‐Healing, and Fully Recyclable Silicone Coordination Elastomers with Unique Photoluminescent Properties

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