Malleable and Self-Healing Covalent Polymer Networks through Tunable Dynamic Boronic Ester Bonds

2015 ◽  
Vol 137 (20) ◽  
pp. 6492-6495 ◽  
Author(s):  
Olivia R. Cromwell ◽  
Jaeyoon Chung ◽  
Zhibin Guan
Keyword(s):  
Polymer Networks ◽  
Self Healing ◽  
Boronic Ester

scholarly journals Internal and external catalysis in boronic ester networks

2021 ◽  
Author(s):  
Boyeong Kang ◽  
Julia Kalow
Keyword(s):  
Mechanical Properties ◽  
Binding Affinity ◽  
Polymer Networks ◽  
Model Systems ◽  
Self Healing ◽  
Dynamic Materials ◽  
Boronic Ester ◽  
Rate Acceleration ◽  
Exchange Spectroscopy ◽  
Kinetics Of

In dynamic materials, the reversible condensation between boronic acids and diols provides adaptability, self-healing ability, and responsiveness to small molecules and pH. Recent work has shown that the thermodynamics and kinetics of bond exchange determine the mechanical properties of dynamic polymer networks. However, prior studies have focused on how structural and environmental factors influence boronic acid–diol binding affinity, and design rules for tuning the kinetics of this dynamic bond are lacking. In this work, we investigate the effects of diol (or polyol) structure and salt additives on the rate of bond exchange, binding affinity, and the mechanical properties of the corresponding polymer networks. To better mimic the environment of polymer networks in our small-molecule model systems, we incorporated proximal amide groups, which are used to conjugate diols to polymers, and included salts commonly found in buffers. Using one-dimensional selective exchange spectroscopy (1D EXSY), we find that both proximal amides and buffering anions induce significant rate acceleration consistent with internal and external catalysis, respectively. This rate acceleration is reflected in the stress relaxation of gels formed using PEG modified with different alcohols, and in the presence of salts containing acetate or phosphate. These findings contribute to the fundamental understanding of the boronic ester dynamic bond and offer new molecular strategies to tune the macromolecular properties of dynamic materials.

scholarly journals Dynamic Semi IPNs with Duple Dynamic Linkers: Self-Healing, Reprocessing, Welding, and Shape Memory Behaviors

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1679
Author(s):  
Yanning Zeng ◽  
Weiming Yang ◽  
Shuxin Liu ◽  
Xiahui Shi ◽  
Aoqian Xi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Material Properties ◽  
Dynamic Properties ◽  
Thermoplastic Polyurethane ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Diels Alder ◽  
Self Healing ◽  
Boronic Ester

Thermoset polymers show favorable material properties, while bringing about environmental pollution due to non-reprocessing and unrecyclable. Diels–Alder (DA) chemistry or reversible exchange boronic ester bonds have been employed to fabricate recycled polymers with covalent adaptable networks (CANs). Herein, a novel type of CANs with multiple dynamic linkers (DA chemistry and boronic ester bonds) was firstly constructed based on a linear copolymer of styrene and furfuryl methacrylate and boronic ester crosslinker. Thermoplastic polyurethane is introduced into the CANs to give a semi Interpenetrating Polymer Networks (semi IPNs) to enhance the properties of the CANs. We describe the synthesis and dynamic properties of semi IPNs. Because of the DA reaction and transesterification of boronic ester bonds, the topologies of semi IPNs can be altered, contributing to the reprocessing, self-healing, welding, and shape memory behaviors of the produced polymer. Through a microinjection technique, the cut samples of the semi IPNs can be reshaped and mechanical properties of the recycled samples can be well-restored after being remolded at 190 °C for 5 min.

Biobased, Biodegradable, Self-Healing Boronic Ester Vitrimers from Epoxidized Soybean Oil Acrylate

2020 ◽  
Author(s):  
Arkadiusz Zych ◽  
Jonathan Tellers ◽  
Laura Bertolacci ◽  
Luca Ceseracciu ◽  
Lara Marini ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Epoxidized Soybean Oil ◽  
Self Healing ◽  
Boronic Ester

scholarly journals Efficiently self-healing boronic ester crystals

2020 ◽  
Vol 11 (10) ◽  
pp. 2606-2613 ◽  
Author(s):  
Patrick Commins ◽  
Marieh B. Al-Handawi ◽  
Durga Prasad Karothu ◽  
Gijo Raj ◽  
Panče Naumov
Keyword(s):  
Organic Crystal ◽  
Self Healing ◽  
Boronic Ester ◽  
Order Of Magnitude

Organic crystal is described that can be bent plastically and twisted elastically, and can self-heal to 67%, an efficiency that is an order-of-magnitude higher compared to the only previously reported example.

Maximizing the symbiosis of static and dynamic bonds in self-healing boronic ester networks

2018 ◽  
Vol 9 (15) ◽  
pp. 2011-2020 ◽  
Author(s):  
Jessica J. Cash ◽  
Tomohiro Kubo ◽  
Daniel J. Dobbins ◽  
Brent S. Sumerlin
Keyword(s):  
Self Healing ◽  
Boronic Ester

Networks that contain boronic ester crosslinks undergo dynamic bond exchange that enables self-healing behavior and reprocessing.

Covalently cross-linked polymer stabilized electrolytes with self-healing performance via boronic ester bonds

2020 ◽  
Vol 11 (36) ◽  
pp. 5893-5902 ◽  
Author(s):  
Sibo Li ◽  
Cai Zuo ◽  
Yong Zhang ◽  
Jirong Wang ◽  
Huihui Gan ◽  
...  
Keyword(s):  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Self Healing ◽  
Boronic Ester ◽  
Facile Fabrication ◽  
Polymer Stabilized

This article reported a facile fabrication of self-healing solid polymer electrolytes via boronic ester bonds.

scholarly journals Hyperexpandable, self-healing macromolecular crystals with integrated polymer networks

Nature ◽  
2018 ◽  
Vol 557 (7703) ◽  
pp. 86-91 ◽  
Author(s):  
Ling Zhang ◽  
Jake B. Bailey ◽  
Rohit H. Subramanian ◽  
Alexander Groisman ◽  
F. Akif Tezcan
Keyword(s):  
Polymer Networks ◽  
Self Healing

Dual stimuli responsive self-healing and malleable materials based on dynamic thiol-Michael chemistry

2017 ◽  
Vol 8 (42) ◽  
pp. 6534-6543 ◽  
Author(s):  
Progyateg Chakma ◽  
Luiz Henrique Rodrigues Possarle ◽  
Zachary A. Digby ◽  
Borui Zhang ◽  
Jessica L. Sparks ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Self Healing ◽  
Stimuli Responsive ◽  
Ph Responsive

Thiol-maleimide adducts are incorporated as crosslinkers into polymer networks and act as pH-responsive and thermoresponsive dynamic crosslinkers, imparting malleability and self-healing properties into the material.

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