scholarly journals Tribological Investigation of Self-Healing Composites Containing Metal/Polymer Microcapsules

2021 ◽  
Author(s):  
Dawei Sun ◽  
◽  
Jianhua Yan ◽  
Xiaoyu Ma ◽  
Mingzhang Lan ◽  
...  
Keyword(s):  
Self Healing ◽  
Metal Polymer

scholarly journals Novel Self-Healing Metallocopolymers with Pendent 4-Phenyl-2,2′:6′,2″-terpyridine Ligand: Kinetic Studies and Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1760
Author(s):  
Rose K. Baimuratova ◽  
Gulzhian I. Dzhardimalieva ◽  
Evgeniy V. Vaganov ◽  
Valentina A. Lesnichaya ◽  
Gulsara D. Kugabaeva ◽  
...  
Keyword(s):  
Critical Role ◽  
Specific Effect ◽  
Kinetic Studies ◽  
Radical Copolymerization ◽  
Self Healing ◽  
Free Radical Copolymerization ◽  
Polymer Hydrogels ◽  
Close Proximity ◽  
Metal Group ◽  
Metal Polymer

We report here our successful attempt to obtain self-healing supramolecular hydrogels with new metal-containing monomers (MCMs) with pendent 4-phenyl-2,2′:6′,2″-terpyridine metal complexes as reversible moieties by free radical copolymerization of MCMs with vinyl monomers, such as acrylic acid and acrylamide. The resulting metal-polymer hydrogels demonstrate a developed system of hydrogen, coordination and electron-complementary π–π stacking interactions, which play a critical role in achieving self-healing. Kinetic data show that the addition of a third metal-containing comonomer to the system decreases the initial polymerization rate, which is due to the specific effect of the metal group located in close proximity of the active center on the growth of radicals.

scholarly journals Intelligent composites and their use for self-healing concrete

2019 ◽  
Vol 6 (4) ◽  
Author(s):  
Vladimir Erofeev ◽  
Valeriy Kruglov ◽  
Nikolay Vatin ◽  
Salman Dawood Salman Al-Dulaimi
Keyword(s):  
Water Absorption ◽  
Economic Incentive ◽  
External Factors ◽  
Reinforced Concrete Structures ◽  
Self Healing ◽  
Engineering Systems ◽  
New Materials ◽  
High Complexity ◽  
Chemical Methods ◽  
Metal Polymer

It is shown that during operation reinforced concrete structures are very often susceptible to cracking, which leads to a deterioration in the quality and expected life of them. The traditional methods of restoration and strengthening of structures are methods of building up, impregnating the structure of concrete with polymer and other materials, applying monolithic coatings or gluing metal polymer and other elements. Known repair methods are characterized by high complexity of execution, high cost, etc. It is shown that there is a pressing economic incentive for the development of concrete capable of self-repairing and repairing damage. Recently, tendencies toward the creation of new materials that are capable of actively interacting with external factors have been outlined towards world practice; such materials have received the name “intellectual”. The use of «intelligent» materials allows you to monitor and predict the state of various structures and structures, at the required time and even in hard-to-reach areas, significantly increase the resource of engineering systems and their reliability. It has been shown that to date, various chemical methods have been developed for creating self-healing concrete. One of the breakthrough technologies in the field of obtaining effective materials and structures based on them are biotechnologies based on the use of microorganisms. Many researchers have studied the use of calcite produced by bacteria to increase the life of concrete-based structures and restore buildings by eliminating cracks, increasing the strength of concrete, reducing permeability, and reducing water absorption. The article provides an overview of the work of foreign specialists in these areas.

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

Congenital self-healing histiocytosis

1982 ◽  
Vol 118 (4) ◽  
pp. 267-272 ◽  
Author(s):  
E. Bonifazi
Keyword(s):  
Self Healing

CHEMISTRY AND MICROSTRUCTURE AT METAL-POLYMER INTERFACES

1988 ◽  
Vol 49 (C5) ◽  
pp. C5-49-C5-59 ◽  
Author(s):  
P. S. HO ◽  
R. HAIGHT ◽  
R. C. WHITE ◽  
B. D. SILVERMAN
Keyword(s):  
Polymer Interfaces ◽  
Metal Polymer

Self-healing juvenile cutaneous mucinosis

1995 ◽  
Vol 131 (4) ◽  
pp. 459-461 ◽  
Author(s):  
R. Caputo
Keyword(s):  
Self Healing

A Quantitative Theory for the Computation of Tire Friction Under Severe Conditions of Sliding

1986 ◽  
Vol 14 (1) ◽  
pp. 44-72 ◽  
Author(s):  
C. M. Mc C. Ettles
Keyword(s):  
Friction Coefficient ◽  
Flash Temperature ◽  
Contact Conditions ◽  
Quantitative Form ◽  
Heating Effects ◽  
Rubber Friction ◽  
Viscoelastic Effects ◽  
Tire Friction ◽  
Pavement Friction ◽  
Metal Polymer

Abstract It is proposed that tire-pavement friction is controlled by thermal rather than by hysteresis and viscoelastic effects. A numerical model of heating effects in sliding is described in which the friction coefficient emerges as a dependent variable. The overall results of the model can be expressed in a closed form using Blok's flash temperature theory. This allows the factors controlling rubber friction to be recognized directly. The model can be applied in quantitative form to metal-polymer-ice contacts. Several examples of correlation are given. The difficulties of characterizing the contact conditions in tire-pavement friction reduce the model to qualitative form. Each of the governing parameters is examined in detail. The attainment of higher friction by small, discrete particles of aluminum filler is discussed.

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