Near superhydrophobic coating synthesized from rice husk ash: Anti-fouling evaluation

Junaidi, Mohd Usman Mohd; Ahmad, Nor Naimah Rosyadah; Leo, C.P.; Yee, Hooi Min

doi:10.1016/j.porgcoat.2016.05.018

Cited by 35 publications

(14 citation statements)

References 30 publications

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“…In the last 20 years, anti-fouling coatings have been extensively studied [110,141,261,[267][268][269][270][271][272][273][274], including sol-gel coatings with anti-fouling properties [131,132,262,275]. Although many approaches and routes have been proposed [131,132,231,[262][263][264][276][277][278][279], there is still an absence of long-term and effective solutions. Generally, two corrosion mechanisms in the marine environment are considered; i.e., microbiologically influenced corrosion (MIC) and marine bio-fouling.…”

Section: Sol-gel Coatings With Anti-fouling Functionmentioning

confidence: 99%

“…The challenges and limitations of the synthesis of stable superhydrophobic coatings were also included and discussed. One of the main advantages of superhydrophobic coatings is that these types of materials may include other properties, such as anti-fouling [276], anti-icing [309] and bio-corrosion [231]. According to a review published by Montemor [231] in 2014, several reported encapsulation-based strategies seem to be promising; however, only a few studies were reported which validated the proposed strategies regarding the corrosion protection behavior [310][311][312].…”

Section: Coatings With Superhydrophobic Functionmentioning

confidence: 99%

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Hybrid Sol–gel Coatings for Corrosion Mitigation: A Critical Review

Figueira

2020

Polymers

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The corrosion process is a major source of metallic material degradation, particularly in aggressive environments, such as marine ones. Corrosion progression affects the service life of a given metallic structure, which may end in structural failure, leakage, product loss and environmental pollution linked to large financial costs. According to NACE, the annual cost of corrosion worldwide was estimated, in 2016, to be around 3%-4% of the world's gross domestic product. Therefore, the use of methodologies for corrosion mitigation are extremely important. The approaches used can be passive or active. A passive approach is preventive and may be achieved by emplacing a barrier layer, such as a coating that hinders the contact of the metallic substrate with the aggressive environment. An active approach is generally employed when the corrosion is set in. That seeks to reduce the corrosion rate when the protective barrier is already damaged and the aggressive species (i.e., corrosive agents) are in contact with the metallic substrate. In this case, this is more a remediation methodology than a preventive action, such as the use of coatings. The sol-gel synthesis process, over the past few decades, gained remarkable importance in diverse areas of application. Sol-gel allows the combination of inorganic and organic materials in a single-phase and has led to the development of organic-inorganic hybrid (OIH) coatings for several applications, including for corrosion mitigation. This manuscript succinctly reviews the fundamentals of sol-gel concepts and the parameters that influence the processing techniques. The state-of-the-art of the OIH sol-gel coatings reported in the last few years for corrosion protection, are also assessed. Lastly, a brief perspective on the limitations, standing challenges and future perspectives of the field are critically discussed.Polymers 2020, 12, 689 The development of OIH sol-gel coatings, based on siloxanes, for corrosion mitigation, has been widely studied in the last few years [2,31,[36][37][38]. Numerous studies have been conducted since the early 1990s [39,40]. The studies performed showed that siloxanes were effective in mitigating the corrosion processes of different metallic substrates. This development was mainly due to the need for alternative environmentally friend materials and processes to replace the traditional chromium-based pre-treatments. Hexavalent chromium (Cr (VI)) is carcinogenic and shows high environmental toxicity and its use has been forbidden since 2006. However, Cr(VI) based pre-treatments improve the coating adherence to the substrate and are effective corrosion inhibitors [41][42][43] which make its replacement challenging. The use of the sol-gel method to produce OIH coatings for corrosion mitigation suits the main requirements of what should be an environmentally friendly process (i.e., excludes washing stages; it is a waste-free method) and allows one to obtain coatings with high purity and specific pore volumes and surface areas. Since it is a mild synthesis...

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Section: Sol-gel Coatings With Anti-fouling Functionmentioning

confidence: 99%

Section: Coatings With Superhydrophobic Functionmentioning

confidence: 99%

Hybrid Sol–gel Coatings for Corrosion Mitigation: A Critical Review

Figueira

2020

Polymers

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“…It plays an important role in the function and integration of nanoelectronics and nano-optoelectronic devices (Bathla et al, 2018). Rice husk ash formed by calcination of rice husk can also be used as an important raw material for superhydrophobic coatings and modified acrylic water-based coatings (Lin et al, 2019;Junaidi et al, 2016). Therefore, through in-depth study on rice husk processing and utilization, it was found that rice husk, broken rice and rice bran of giant embryo rice are important biomass resources and industrial raw materials, and have broad application value.…”

Section: Processing and Utilization Of Giant Embryo Ricementioning

confidence: 99%

Characteristics of Giant Embryo Rice and Research Prospect of Its Processing and Utilization

Peng¹,

Tian²,

He³

et al. 2019

JPS

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Giant embryo rice is a special kind of functional rice which can produce eutrophic rice. It conforms to people's concept of food consumption and healthy life. Giant embryo rice and its intensively processed products have been widely used in food, medicine, health products and other fields. They have extremely important scientific significance and economic value, and have become one of the most nutritional and health-care functional rice in the future. In recent years, a series of important advances have been made in the research of giant embryo rice. The special nutrients, agronomic characteristics and products developed by giant embryo rice have attracted the attention of rice breeders and consumers at home and abroad. In this paper, the research contents and new advances in the creation and breeding of giant embryo rice germplasm, the characteristics of nutrient changes, important agronomic traits and the processing and utilization of giant embryo rice were summarized, and the application prospect of giant embryo rice was prospected, all of which could provide important reference for the development and sustainable utilization of giant embryo rice.

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“…The present construction industry, receives a lot of attention in the application of superhydrophobic coatings and admixtures for construction materials since they offer anti-fouling (Junaidi et al, 2016), anti-corrosion (Tittarelli and Moriconi, 2011) and anti-icing properties (Ramachandran et al, 2016) Besides introducing the hydrophobic agents as mentioned earlier, nanoparticles are commonly used to create the required roughness for superhydrophobic surface (Ahmad et al, 2015). Water penetration of concrete is reduced more than 84% when superhydrophobic ash is applied on the concrete surface or blended into the concrete before curing.…”

Section: Introductionmentioning

confidence: 99%

Rice husk modified cement strength-An environmental approach

Sathish¹,

Ponnusamy²

2019

JEB

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To improve the life of concrete by surface modifications and to increase hydrophobic nature of concrete by porosity reduction through rice husk coating. Rice husk ash was dispersed in ethanolic solution containing fluoroalkyl silone to prepare super hydrophobic coating. This solution was sprayed on the layer of commercial adhesive coated on the concrete. Water contact angle of 150.3 was observed on the coated concrete. The cumulative water uptake was reduced up to 40.38%. Super hydrophobic coating on concrete requires roughness which was created by silica particles in the rice husk. Penetration of water into the coated concrete was successfully reduced, but did not prevent completely. The coating did not affect the surface hardness or the compressive strength, but surface porosity was reduced. Hydrophobicity, Modified concrete strength, Porosity, Rice husk Rice husk modified cement strength-An environmental approach

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Near superhydrophobic coating synthesized from rice husk ash: Anti-fouling evaluation

Cited by 35 publications

References 30 publications

Hybrid Sol–gel Coatings for Corrosion Mitigation: A Critical Review

Hybrid Sol–gel Coatings for Corrosion Mitigation: A Critical Review

Characteristics of Giant Embryo Rice and Research Prospect of Its Processing and Utilization

Rice husk modified cement strength-An environmental approach

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