Durable and self-healing superhydrophobic surfaces for building materials

2017 ◽  
Vol 192 ◽  
pp. 56-59 ◽  
Author(s):  
Usama Zulfiqar ◽  
Muhammad Awais ◽  
Syed Zajif Hussain ◽  
Irshad Hussain ◽  
S. Wilayat Husain ◽  
...  
Keyword(s):  
Building Materials ◽  
Superhydrophobic Surfaces ◽  
Self Healing

Stretchable dual cross-linked silicon elastomer with superhydrophobic surface and fast triple self-healing ability at room temperature

Soft Matter ◽  
2021 ◽  
Author(s):  
Yuxing Shan ◽  
shuai liang ◽  
Xiangkai Mao ◽  
Jie Lu ◽  
Lili Liu ◽  
...  
Keyword(s):  
Superhydrophobic Surface ◽  
Room Temperature ◽  
Superhydrophobic Surfaces ◽  
Self Healing ◽  
Wearable Electronics ◽  
Actual Application ◽  
Potential Applications

Abstract. Stretchable elastomers with superhydrophobic surfaces have potential applications in wearable electronics. However, various types of damage inevitably occur on these elastomers in actual application, resulting in deterioration of the...

scholarly journals Bioprecipitation of calcium carbonate by Bacillus subtilis and its potential to self-healing in cement-based materials

2020 ◽  
Vol 18 (5) ◽  
Author(s):  
Héctor Ferral Pérez ◽  
Mónica Galicia García
Keyword(s):  
Bacillus Subtilis ◽  
Calcium Carbonate ◽  
Building Materials ◽  
Soil Stabilization ◽  
Amorphous Material ◽  
Crystallinity Index ◽  
Self Healing ◽  
Semi Solid ◽  
A Minor ◽  
Novel Applications

In recent years, biological mineralization has been implemented as a viable option for the elaboration of new building materials, protection and repair of concrete by self-healing, soil stabilization, carbon dioxide capture, and drug delivery. Biogenic mineralization of calcium carbonate (CaCO3) induced by bacterial metabolism has been proposed as an effective method. The objective of the present study was to characterize the bioprecipitation of CaCO3 crystals by Bacillus subtilis in a semi-solid system. The results show that CaCO3 crystals were produced by day 3 of incubation. The prevalent crystalline polymorph was calcite, and in a minor proportion, vaterite. The presence of amorphous material was also detected (amorphous CaCO3 (ACC)). Finally, the crystallinity index was 81.1%. This biogenic calcium carbonate does not decrease pH and does not yield chloride formation. Contrary, it increases pH values up to 10, which constitutes and advantage for implementations at reinforced concrete. Novel applications for biogenic calcium carbonate derived from Bacillus subtilis addressing self-healing, biocementation processes, and biorestoration of monuments are presented.  

scholarly journals Self-Healing Potential of Geopolymer Concrete

Proceedings ◽  
2019 ◽  
Vol 34 (1) ◽  
pp. 6
Author(s):  
Rajczakowska ◽  
Habermehl-Cwirzen ◽  
Hedlund ◽  
Cwirzen
Keyword(s):  
Building Materials ◽  
Crack Opening ◽  
Healing Process ◽  
Activation Parameters ◽  
Optical Microscope ◽  
Bending Test ◽  
Geopolymer Concrete ◽  
Self Healing ◽  
Lime Water ◽  
Activated Slag

Waste management is emerging as one of the most troublesome and critical problems of the upcoming decades. Therefore, the utilization of industrial by-products as building materials components has been widely studied in recent years. Geopolymer concrete, with binder entirely substituted by slag or fly ash, is one of the materials, which combines positive environmental impact with satisfying mechanical parameters. Although various properties of geopolymers have been examined, the autogeneous self-healing potential of this alternative binder has not been thoroughly verified yet. This paper aims to validate whether geopolymer concrete made of alkali activated slag is capable of self-repair. Four different mortar mixes with two types of slag and varying activation parameters were investigated. The polyvinyl alcohol (PVA) fibers were added in order to control the crack width. The 1.2 × 1.2 × 6 cm beams were pre-cracked with the use of three point bending test at 7 days after casting to achieve crack opening of approximately 300 µm. The effects of various exposure conditions on the healing process were examined, i.e., lime water, different sodium silicate solutions and water. The self-healing efficiency as well as the evolution of the crack recovery was assessed by the observation of the crack surface with the use of digital optical microscope. The healed area of the crack was calculated and compared for all the specimens by applying the image processing techniques. The morphology of the healing products as well as their chemical composition were examined with the use of Scanning Electron Microscope with Energy Dispersive Spectroscopy.

Designing Self-Healing Superhydrophobic Surfaces with Exceptional Mechanical Durability

2017 ◽  
Vol 9 (12) ◽  
pp. 11212-11223 ◽  
Author(s):  
Kevin Golovin ◽  
Mathew Boban ◽  
Joseph M. Mabry ◽  
Anish Tuteja
Keyword(s):  
Superhydrophobic Surfaces ◽  
Self Healing ◽  
Mechanical Durability

Fabrication of Self-Healable, Robust Superhydrophobic Surfaces Using UV-Crosslinked Nanocomposite Films

2021 ◽  
Vol 21 (12) ◽  
pp. 6212-6216
Author(s):  
Yeon-Ah Park ◽  
Young-Geun Ha
Keyword(s):  
Low Cost ◽  
Synergetic Effect ◽  
Spray Coating ◽  
Uv Curing ◽  
Industrial Applications ◽  
Contact Angles ◽  
Superhydrophobic Surfaces ◽  
Nanocomposite Films ◽  
Self Healing ◽  
Water Contact

Studies on fabricating robust superhydrophobic surfaces by a low-cost method have been rare, despite the recent demand for nature-inspired superhydrophobic surfaces including self-healing ability in various industrial applications. Herein, we propose a fabrication method for self-healable, robust superhydrophobic nanocomposite films by facile solution-processed spray coating and UV curing. The components of the coating solution include functionalized hydrophobic silica nanoparticles for producing high roughness hierarchical textured structures with low surface energy, and UV-crosslinkable v-POSS and bi-thiol hydrocarbon molecules to improve the film stability. As a result of the synergetic effect of the hydrophobic nanoparticles and UV-crosslinked polymeric compounds, the spray-coated and UV-cured nanocomposite films possess excellent superhydrophobicity (water contact angles > 150º) and high stability, in addition to self-healing abilities.

Recent development in the fabrication of self-healing superhydrophobic surfaces

2019 ◽  
Vol 373 ◽  
pp. 531-546 ◽  
Author(s):  
Ebenezer Kobina Sam ◽  
Daniel Kobina Sam ◽  
Xiaomeng Lv ◽  
Botao Liu ◽  
Xinxin Xiao ◽  
...  
Keyword(s):  
Superhydrophobic Surfaces ◽  
Self Healing

scholarly journals Constructing Mechanochemical Durable and Self-Healing Superhydrophobic Surfaces

ACS Omega ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 986-994 ◽  
Author(s):  
Chengjiao Zhang ◽  
Fanghua Liang ◽  
Wei Zhang ◽  
Hui Liu ◽  
Mingzheng Ge ◽  
...  
Keyword(s):  
Superhydrophobic Surfaces ◽  
Self Healing

Fast self-healing superhydrophobic surfaces enabled by biomimetic wax regeneration

2020 ◽  
Vol 390 ◽  
pp. 124311 ◽  
Author(s):  
Yingke Wang ◽  
Yiping Liu ◽  
Juan Li ◽  
Liwei Chen ◽  
Shilin Huang ◽  
...  
Keyword(s):  
Superhydrophobic Surfaces ◽  
Self Healing
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