Autonomic Healing of Polymers

MRS Bulletin ◽  
2008 ◽  
Vol 33 (8) ◽  
pp. 766-769 ◽  
Author(s):  
Scott R. White ◽  
Mary M. Caruso ◽  
Jeffrey S. Moore
Keyword(s):  
Time Frame ◽  
Advanced Materials ◽  
Self Healing ◽  
Technological Advancement ◽  
Practical Application ◽  
Structural Composites ◽  
Materials Development ◽  
Polymeric Systems ◽  
The Past ◽  
Potential Applications

AbstractSelf-healing polymers have experienced rapid technological advancement over the past seven years. They have moved from a conceptual demonstration to practical application in this time frame and have grown from a single design to a generic paradigm for modern materials development. Potential applications of self-healing polymers are quite broad, including microelectronic substrates and encapsulants, polymeric paints and coatings, structural composites, and biomedical devices. In this article, we focus on polymeric systems that heal in an autonomic fashion, that is, automatically and without human intervention. The types of systems under development and the future of this paradigm in advanced materials are discussed.

scholarly journals Self-Healing Materials Systems: Overview of Major Approaches and Recent Developed Technologies

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
B. Aïssa ◽  
D. Therriault ◽  
E. Haddad ◽  
W. Jamroz
Keyword(s):  
Multidisciplinary Approach ◽  
Product Safety ◽  
Self Healing ◽  
Metallic Materials ◽  
Exciting Field ◽  
Engineering Applications ◽  
Polymeric Systems ◽  
The Past ◽  
Improve Product ◽  
Thermosetting Composite

The development of self-healing materials is now being considered for real engineering applications. Over the past few decades, there has been a huge interest in materials that can self-heal, as this property can increase materials lifetime, reduce replacement costs, and improve product safety. Self-healing systems can be made from a variety of polymers and metallic materials. This paper reviews the main technologies currently being developed, particularly on the thermosetting composite polymeric systems. An overview of various self-healing concepts over the past decade is then presented. Finally, a perspective on future self-healing approaches using this biomimetic technique is offered. The intention is to stimulate debate and reinforce the importance of a multidisciplinary approach in this exciting field.

scholarly journals Basic Approaches to the Design of Intrinsic Self-Healing Polymers for Triboelectric Nanogenerators

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2594
Author(s):  
Gulzhian I. Dzhardimalieva ◽  
Bal C. Yadav ◽  
Sarkyt E. Kudaibergenov ◽  
Igor E. Uflyand
Keyword(s):  
Mechanical Energy ◽  
Multiple Bond ◽  
Advanced Materials ◽  
Self Healing ◽  
The Past ◽  
Triboelectric Nanogenerators ◽  
Basic Approaches ◽  
Imine Bond ◽  
The Impact ◽  
Ligand Bond

Triboelectric nanogenerators (TENGs) as a revolutionary system for harvesting mechanical energy have demonstrated high vitality and great advantage, which open up great prospects for their application in various areas of the society of the future. The past few years have seen exponential growth in many new classes of self-healing polymers (SHPs) for TENGs. This review presents and evaluates the SHP range for TENGs, and also attempts to assess the impact of modern polymer chemistry on the development of advanced materials for TENGs. Among the most widely used SHPs for TENGs, the analysis of non-covalent (hydrogen bond, metal–ligand bond), covalent (imine bond, disulfide bond, borate bond) and multiple bond-based SHPs in TENGs has been performed. Particular attention is paid to the use of SHPs with shape memory as components of TENGs. Finally, the problems and prospects for the development of SHPs for TENGs are outlined.

Bioethics In Neurospinal Patient Care

2018 ◽  
Vol 1 (2) ◽  
pp. 1
Author(s):  
Andi Asadul Islam
Keyword(s):  
Time Frame ◽  
Hippocratic Oath ◽  
Moral Vision ◽  
Human Identity ◽  
The Past ◽  
Harvey Cushing ◽  
Sharp Focus ◽  
Realistic Approach ◽  
Cord Injury

Neurosurgery is among the newest of surgical disciplines, appearing in its modern incarnation at the dawn of twentieth century with the work of Harvey Cushing and contemporaries. Neurosurgical ethics involves challenges of manipulating anatomical locus of human identity and concerns of surgeons and patients who find themselves bound together in that venture.In recent years, neurosurgery ethics has taken on greater relevance as changes in society and technology have brought novel questions into sharp focus. Change of expanded armamentarium of techniques for interfacing with the human brain and spine— demand that we use philosophical reasoning to assess merits of technical innovations.Bioethics can be defined as systematic study of moral challenges in medicine, including moral vision, decisions, conduct, and policies related to medicine. Every surgeon should still take the Hippocratic Oath seriously and consider it a basic guide to follow good medical ethics in medical practice. It is simple and embodies three of the four modern bioethics principles – Respecting autonomy, beneficence, nonmaleficence, and justice.Spinal cord injury (SCI) is a devastating condition often affecting young and healthy individuals around the world. Currently, scientists are pressured on many fronts to develop an all-encompassing “cure” for paralysis. While scientific understanding of central nervous system (CNS) regeneration has advanced greatly in the past years, there are still many unknowns with regard to inducing successful regeneration. A more realistic approach is required if we are interested in improving the quality of life of a large proportion of the paralyzed population in a more expedient time frame.

Novel organic, polymeric materials for electronics applications

2002 ◽  
Vol 722 ◽  
Author(s):  
Ram W. Sabnis ◽  
Mary J. Spencer ◽  
Douglas J. Guerrero
Keyword(s):  
Optical Density ◽  
Chemical Vapor ◽  
Polymeric Materials ◽  
Substantial Improvement ◽  
Polymeric Systems ◽  
Patterned Wafers ◽  
Visible Spectra ◽  
Potential Applications ◽  
Deep Ultraviolet ◽  
Deposited Films

AbstractNovel organic, polymeric materials and processes of depositing thin films on electronics substrates by chemical vapor deposition (CVD) have been developed and the lithographic behavior of photoresist coated over these CVD films at deep ultraviolet (DUV) wavelength has been evaluated. The specific monomers synthesized for DUV applications include [2.2](1,4)- naphthalenophane, [2.2](9,10)-anthracenophane and their derivatives which showed remarkable film uniformity on flat wafers and conformality over structured topography wafers, upon polymerization by CVD. The chemical, physical and optical properties of the deposited films have been characterized by measuring parameters such as thickness uniformity, solubility, conformality, adhesion to semiconductor substrates, ultraviolet-visible spectra, optical density, optical constants, defectivity, and resist compatibility. Scanning electron microscope (SEM) photos of cross-sectioned patterned wafers showed verticle profiles with no footing, standing waves or undercut. Resist profiles down to 0.10 νm dense lines and 0.09 νm isolated lines were achieved in initial tests. CVD coatings generated 96-100% conformal films, which is a substantial improvement over commercial spin-on polymeric systems. The light absorbing layers have high optical density at 248 nm and are therefore capable materials for DUV lithography applications. CVD is a potentially useful technology to extend lithography for sub-0.15 νm devices. These films have potential applications in microelectronics, optoelectronics and photonics.

scholarly journals Advances in Synthesis of π-Extended Benzosilole Derivatives and Their Analogs

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 548
Author(s):  
Tuan Thanh Dang ◽  
Hue Minh Thi Nguyen ◽  
Hien Nguyen ◽  
Tran Ngoc Dung ◽  
Minh Tho Nguyen ◽  
...  
Keyword(s):  
Solar Cells ◽  
Physical Properties ◽  
Electronic Materials ◽  
Advanced Materials ◽  
Potential Applications

Benzosiloles and their π-extended derivatives are present in many important advanced materials due to their excellent physical properties. Especially, they have found many potential applications in the development of novel electronic materials such as OLEDs, semiconductors and solar cells. In this review, we have summarized several main approaches to construct (di)benzosilole derivatives and (benzo)siloles fused to aromatic five- and six-membered heterocycles.

scholarly journals Organic magnetoelectric and optomagnetic couplings: perspectives for organic spin optoelectronics

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Zhongxuan Wang ◽  
Wei Qin
Keyword(s):  
Ferromagnetic Materials ◽  
The Past ◽  
Potential Applications ◽  
Further Development

AbstractOver the past years, the development of organic ferromagnetic materials has been investigated worldwide for potential applications. Due to the couplings among the charge, orbit, spin, and phonon in organic ferromagnetic materials, magnetoelectric, and optomagnetic couplings have been realized and observed. In this review, progress in organic magnetoelectric and optomagnetic couplings is presented, and the mechanisms behind the phenomena are also briefly summarized. Hopefully, the understanding of magnetoelectric and optomagnetic couplings could provide guidance for the further development of organic spin optoelectronics.

scholarly journals Achromatic terahertz Airy beam generation with dielectric metasurfaces

Nanophotonics ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Qingqing Cheng ◽  
Juncheng Wang ◽  
Ling Ma ◽  
Zhixiong Shen ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Biomedical Imaging ◽  
Frequency Dispersion ◽  
Light Sheet ◽  
Photonic Devices ◽  
Self Healing ◽  
Beam Focusing ◽  
Light Sheet Microscopy ◽  
Airy Beam ◽  
Potential Applications ◽  
Airy Beams

AbstractAiry beams exhibit intriguing properties such as nonspreading, self-bending, and self-healing and have attracted considerable recent interest because of their many potential applications in photonics, such as to beam focusing, light-sheet microscopy, and biomedical imaging. However, previous approaches to generate Airy beams using photonic structures have suffered from severe chromatic problems arising from strong frequency dispersion of the scatterers. Here, we design and fabricate a metasurface composed of silicon posts for the frequency range 0.4–0.8 THz in transmission mode, and we experimentally demonstrate achromatic Airy beams exhibiting autofocusing properties. We further show numerically that a generated achromatic Airy-beam-based metalens exhibits self-healing properties that are immune to scattering by particles and that it also possesses a larger depth of focus than a traditional metalens. Our results pave the way to the realization of flat photonic devices for applications to noninvasive biomedical imaging and light-sheet microscopy, and we provide a numerical demonstration of a device protocol.

scholarly journals Recent progress in materials development for CO2 conversion: issues and challenges

2021 ◽  
Author(s):  
Sourav Ghosh ◽  
Arindam Modak ◽  
Arnab Samanta ◽  
Kanika Kole ◽  
Subhra Jana
Keyword(s):  
Recent Progress ◽  
Value Added ◽  
Advanced Materials ◽  
Current Status ◽  
Co2 Conversion ◽  
Technical Feasibility ◽  
Materials Development

A comprehensive and critical in-depth discussion on the development and prospect of several advanced materials for conversion of CO2 to value added chemicals is provided, together with their current status, technical feasibility and future opportunities.

A self-healable, stretchable, tear-resistant and sticky elastomer enabled by a facile polymer blends strategy

2021 ◽  
Vol 9 (7) ◽  
pp. 3931-3939
Author(s):  
Shiqiang Song ◽  
Honghao Hou ◽  
Jincheng Wang ◽  
Pinhua Rao ◽  
Yong Zhang
Keyword(s):  
Polymer Blends ◽  
High Strength ◽  
Self Healing ◽  
Potential Applications ◽  
Physical Blending

A high-stretchability, high-strength, tear-resistant, self-healing and adhesive elastomer is prepared through a facile and effective physical blending strategy. The elastomer shows potential applications in e-skin devices.

scholarly journals Understanding ion-induced assembly of cellulose nanofibrilllar gels through shear-free mixing and in situ scanning-SAXS

2021 ◽  
Author(s):  
Tomas Rosén ◽  
Ruifu Wang ◽  
HongRui He ◽  
Chengbo Zhan ◽  
Shirish Chodankar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Building Block ◽  
Cellulose Nanofibrils ◽  
Advanced Materials ◽  
The Past

During the past decade, cellulose nanofibrils (CNFs) have shown tremendous potential as a building block to fabricate new advanced materials that are both biocompatible and biodegradable. The excellent mechanical properties...

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