Polymers bearing dynamic covalent bonds may exhibit dynamic properties, such as self-healing, shape memory and environmental adaptation. However, most dynamic covalent chemistries developed so far require either catalyst or change of environmental conditions to facilitate bond reversion and dynamic property change in bulk materials. Here we report the rational design of hindered urea bonds (urea with bulky substituent attached to its nitrogen) and the use of them to make polyureas and poly(urethane-urea)s capable of catalyst-free dynamic property change and autonomous repairing at low temperature. Given the simplicity of the hindered urea bond chemistry (reaction of a bulky amine with an isocyanate), incorporation of the catalyst-free dynamic covalent urea bonds to conventional polyurea or urea-containing polymers that typically have stable bulk properties may further broaden the scope of applications of these widely used materials.
Self Healing Networks Pdf Free
The global self-healing concrete market size was valued at USD 24.60 billion in 2019 and is expected to expand at a compound annual growth rate (CAGR) of 37.0% from 2020 to 2027. Rising demand for reliable and durable constructions, such as infrastructure, commercial, industrial, and residential, is expected to drive the demand for self-healing concrete over the forecast period. Ascending growth of the construction industry across the globe, coupled with a rise in demand for reduction in the structural maintenance of the buildings, is further likely to support the market growth. However, the COVID-19 pandemic across the globe has impacted the construction output in the second quarter of 2020, which has hampered the market for the product.
In the U.S., the market for self-healing concrete is anticipated to expand at a CAGR of 34.9% in terms of revenue from 2020 to 2027. The construction industry in the U.S. is anticipated to witness significant growth over the forecast period on account of growing inclination towards industrial development and rising demand for commercial constructions in the country.
The market is expected to expand at a high growth rate in the upcoming period owing to the rise in demand for less maintenance of building and infrastructure. To enhance the lifespan of buildings and structures, self-healing concrete offers feasible solutions, thereby gaining traction in the construction market.
Traditional concrete and its related substances are subject to crack over a period of time, resulting in increased tension on walls and beams. To support the crack repairs and reduce maintenance of the buildings, self-healing concrete is used in the construction process. This specialized concrete produces limestone with the help of bacteria present in the concrete substances.
The rise in demand for eco-friendly and sustainable constructions with high endurance is expected to drive the demand for self-healing concrete. However, nowadays, the proportion of non-hardening cement in the construction process is less, along with growing trends of fast construction. Moreover, unskilled labor is scaling the proportion of natural cracks in walls and columns of buildings. Thus, the service and repair activities of the construction are likely to ascend the demand for self-healing concrete over the forecast period.
In 2019, the vascular form of self-healing concrete accounted for the largest revenue share of 62.18% and is expected to witness the highest growth over the forecast period. This form is used when a series of tubes filled with concrete healing substances are passed through the concrete structure from the interior to the exterior of the building walls. These tubes need to be placed at anticipated locations wherein the crack is likely to occur, which makes the system non-pervasive.
Capsule-based self-healing concrete is expected to witness notable growth over the forecast period owing to the ease of convenience the technique offers for large-scale usage. These substances when poured into the gaps react with air or another embedded concrete matrix and create hardened substances that fill gaps in walls and other building components.
Bacteria-based capsules for self-healing are preferred in the market as these have an extended lifespan and can stay active for over 100 years. Whereas the chemical-based capsules may lose healing capabilities over a period of time and thus are less popular in self-healing applications. Cylindrical shaped capsules take up larger areas and can be built at higher lengths, and thus have a better healing mechanism than spherical shaped capsules.
Industrial construction needs to withstand harsh mechanical impacts owing to heavy-duty operations, including carriage of vehicles, operating heavy machinery, and heat treatments that require rigid surfaces with durability. Hence, self-healing concrete is expected to gain traction in industrial construction since these structures need strong resistance to various physical and chemical factors to comply with the technological requirements for a safe and convenient surface to carry out industrial operations.
The use of self-healing concrete in residential and commercial buildings is expected to help reduce the permeability of the construction and manage cracks. Foundations, grade slabs, floorings, basements, and walls are the key applications areas where reinforcement of the concrete is required to increase the lifespan of these structures.
The market is moderately competitive on account of the limited presence of concrete manufacturers and less awareness about the product in the market. However, the competitive environment for materials used in self-healing concrete is moderately high as the procurement practices and material prices are dynamic. Raw material suppliers, concrete manufacturers, healing agent suppliers, and end-users are the different entities of the market. Key players are engaged in the manufacturing and supply of healing agents for concrete products. Some prominent players in the global self-healing concrete market include:
This report forecasts volume and revenue growth at the global, regional, and country levels and provides an analysis of the latest industry trends and opportunities in each of the sub-segments from 2016 to 2027. For the purpose of this study, Grand View Research has segmented the global self-healing concrete market report on the basis of form, application, and region: 2ff7e9595c
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