Polymers with autonomous life-cycle control

Patrick, James M.; Robb, Maxwell J.; Sottos, Nancy R.; Moore, Jeffrey S.; White, Scott R.

doi:10.1038/nature21002

Cited by 355 publications

(265 citation statements)

References 100 publications

Supporting

Mentioning

263

Contrasting

Unclassified

Order By: Relevance

“…[1][2][3][4][5] Relevant applications include gas and molecule separations, 6 water purification membranes, 7 barrier materials, self-healing systems based on microcapsules, [8][9][10] ion and solute transport in polymeric materials and biological systems, 11 and the flow of colloids in porous media. 12,13 Penetrants are here, by definition, smaller than the elementary species that constitutes the matrix, but they can still vary over a wide range of absolute and relative size and shape and the extent of attractive interactions with the matrix material.…”

Section: Introductionmentioning

confidence: 99%

Correlated matrix-fluctuation-mediated activated transport of dilute penetrants in glass-forming liquids and suspensions

Zhang

Schweizer

2017

The Journal of Chemical Physics

View full text Add to dashboard Cite

We formulate a microscopic, force-level statistical mechanical theory for the activated diffusion of dilute penetrants in dense liquids, colloidal suspensions, and glasses. The approach explicitly and selfconsistently accounts for coupling between penetrant hopping and matrix dynamic displacements that actively facilitate the hopping event. The key new ideas involve two mechanistically (at a stochastic trajectory level) coupled dynamic free energy functions for the matrix and spherical penetrant particles. A single dynamic coupling parameter quantifies how much the matrix displaces relative to the penetrant when the latter reaches its transition state which is determined via the enforcement of a temporal causality or coincidence condition. The theory is implemented for dilute penetrants smaller than the matrix particles, with or without penetrant-matrix attractive forces. Model calculations reveal a rich dependence of the penetrant diffusion constant and degree of dynamic coupling on size ratio, volume fraction, and attraction strength. In the absence of attractions, a near exponential decrease of penetrant diffusivity with size ratio over an intermediate range is predicted, in contrast to the much steeper, non-exponential variation if one assumes local matrix dynamical fluctuations are not correlated with penetrant motion. For sticky penetrants, the relative and absolute influence of caging versus physical bond formation is studied. The conditions for a dynamic crossover from the case where a time scale separation between penetrant and matrix activated hopping exists to a "slaved" or "constraint release" fully coupled regime are determined. The particle mixture model is mapped to treat experimental thermal systems and applied to make predictions for the diffusivity of water, toluene, methanol, and oxygen in polyvinylacetate liquids and glasses. The theory agrees well with experiment with values of the penetrant-matrix size ratio close to their chemically intuitive values. Published by AIP Publishing.

show abstract

Section: Introductionmentioning

confidence: 99%

Correlated matrix-fluctuation-mediated activated transport of dilute penetrants in glass-forming liquids and suspensions

Zhang

Schweizer

2017

The Journal of Chemical Physics

View full text Add to dashboard Cite

show abstract

“…Self‐healing materials can repair themselves automatically after being damaged to increase their safety and extend service life. They are classified into extrinsic self‐healing materials with addition of healing agents and intrinsic self‐healing materials with dynamic interactions . Intrinsic self‐healing materials can heal local damages many times and their structures can be designed according to our requirements for improved mechanical properties or self‐healing properties.…”

Section: Molecular Composition Of S‐icpsmentioning

confidence: 99%

A Three‐Armed Polymer with Tunable Self‐Assembly and Self‐Healing Properties Based on Benzene‐1,3,5‐tricarboxamide and Metal–Ligand Interactions

Tan

Guan

et al. 2019

Macromol. Rapid Commun.

View full text Add to dashboard Cite

The dynamic nature of supramolecules makes them useful in the fields of smart devices. The combination of multiple dynamic interactions in one material may bring some enhanced properties in mechanical property, self‐healing property, or recyclability. Thus, it is significantly meaningful to design new materials with multi‐dynamic bonds and clarify their bonding mechanisms. Here, a novel three‐armed polymer based on benzene‐1,3,5‐tricarboxamide (BTA) is developed and the polymer could be further complexed by metal ions to form dynamic zinc–imidazole interactions. In this system, BTA is located in the center, and the ligand‐functionalized monomer is copolymerized with n‐butyl acrylate to form three chains. This is the first time BTA is introduced to a self‐healing system to endow the polymer with assembly and self‐healing properties. The composition, chemical structure, assembly behavior, mechanical properties, and self‐healing properties of the polymer are investigated. It is revealed that the assembly behavior of the polymer depends on the BTA contents and time. The mechanical property can be easily tuned by ligand/metal ratio and is significantly adjusted by the polymer chain length and environment humidity. Long polymer chains not only contribute to good mechanical property but also promote the self‐healing process due to the effective physical entanglement.

show abstract

“…Biomimetic self‐healing through adaptive repair of damages and self‐report through detecting the loss of performance are two challenges in synthetic materials of great importance . Self‐healing materials have attracted increasing attention due to the abilities of autonomous protection against damages or even of regeneration in response to environmental stress, which reduce security risks and economic losses.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Polymeric Coatings with Self‐Reporting and Self‐Healing Dual Functions from Porous Core–Shell Nanostructures

Wang

Zhou

et al. 2018

Macro Materials & Eng

View full text Add to dashboard Cite

In biological system, early detection and treatment at the same moment is highly required. For synthetic materials, it is demanding to develop materials that possess self‐reporting of early damage and self‐healing simultaneously. This dual function is achieved in this work by introducing an intelligent pH‐responsive coatings based on poly(divinylbenzene)‐graft‐poly(divinylbenzene‐co‐methacrylic acid) (PDVB‐graft‐P(DVB‐co‐AA)) core–shell microspheres as smart components of the polymer coatings for corrosion protection. The key component, synthesized PDVB‐graft‐P(DVB‐co‐AA) core–shell microspheres are porous and pH responsive. The porosity allows for encapsulation of the corrosion inhibitor of benzotriazole and the fluorescent probe, coumarin. Both loading capacities can be up to about 15 wt%. The polymeric coatings doped with the synthesized microspheres can adapt immediately to the varied variation in pH value from the electrochemical corrosion reaction and release active molecules on demand onto the damaged cracks of the coatings on metal surfaces. It leads simultaneously to the dual functions of self‐healing and self‐reporting. The corrosion area can be self‐reported in 6 h, while the substrate can be protected at least for 1 month in 3.5 wt% NaCl solution. These pH‐responsive materials with self‐reporting and self‐healing dual functions are highly expected to have a bright future due to their smart, long‐lasting, recyclable, and multifunctional properties.

show abstract

Polymers with autonomous life-cycle control

Cited by 355 publications

References 100 publications

Correlated matrix-fluctuation-mediated activated transport of dilute penetrants in glass-forming liquids and suspensions

Correlated matrix-fluctuation-mediated activated transport of dilute penetrants in glass-forming liquids and suspensions

A Three‐Armed Polymer with Tunable Self‐Assembly and Self‐Healing Properties Based on Benzene‐1,3,5‐tricarboxamide and Metal–Ligand Interactions

Adaptive Polymeric Coatings with Self‐Reporting and Self‐Healing Dual Functions from Porous Core–Shell Nanostructures

Contact Info

Product

Resources

About