Evaluation of corrosion inhibition and self healing capabilities of nanoclay and tung oil microencapsulated epoxy coatings on rebars in concrete

Sharma, Nikhil; Sharma, Shruti; Sharma, Sandeep; Mehta, Rajeev

doi:10.1016/j.conbuildmat.2020.120278

Cited by 42 publications

(15 citation statements)

References 71 publications

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“…Urea-formaldehyde microcapsules were selected as containers or shells due to their availability, low cost, high heat capacity, and good thermal stability [ 12 ]. Tung oil and linalyl acetate were chosen as self-healing agents because of their promising self-healing ability [ 24 , 25 , 26 ]. The TMMCs (3 wt.% and 5 wt.%), and LMMCs (3 wt.% and 5 wt.%) were separately reinforced into the epoxy matrix to develop TMMCs and LMMCs reinforced smart coatings (TMCOATs, and LMCOATs) respectively.…”

Section: Introductionmentioning

confidence: 99%

Self-Healing Performance of Smart Polymeric Coatings Modified with Tung Oil and Linalyl Acetate

et al. 2021

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This work focuses on the synthesis and characterization of polymeric smart self-healing coatings. A comparison of structural, thermal, and self-healing properties of two different polymeric coatings comprising distinct self-healing agents (tung oil and linalyl acetate) is studied to elucidate the role of self-healing agents in corrosion protection. Towards this direction, urea-formaldehyde microcapsules (UFMCs) loaded with tung oil (TMMCs) and linalyl acetate (LMMCs) were synthesized using the in-situ polymerization method. The synthesis of both LMMCs and TMMCs under identical experimental conditions (900 rpm, 55 °C) has resulted in a similar average particle size range (63–125 µm). The polymeric smart self-healing coatings were developed by reinforcing a polymeric matrix separately with a fixed amount of LMMCs (3 wt.% and 5 wt.%), and TMMCs (3 wt.% and 5 wt.%) referred to as LMCOATs and TMCOATs, respectively. The development of smart coatings (LMCOATs and TMCOATs) contributes to achieving decent thermal stability up to 450 °C. Electrochemical impedance spectroscopy (EIS) analysis indicates that the corrosion resistance of smart coatings increases with increasing concentration of the microcapsules (TMMCs, LMMCs) in the epoxy matrix reaching ~1 GΩ. As a comparison, LMCOATs containing 5 wt.% LMMCs demonstrate the best stability in the barrier properties than other developed coatings and can be considered for many potential applications.

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Section: Introductionmentioning

confidence: 99%

Self-Healing Performance of Smart Polymeric Coatings Modified with Tung Oil and Linalyl Acetate

et al. 2021

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“…3). High voltage is used for impressing corrosion in coated bars in concrete to accelerate corrosion in a lesser duration of time to arrive at useful strategies for corrosion inhibition and protection [35,[81][82][83][84][85][86][91][92][93]. A brief description of the testing follows.…”

Section: Accelerated Impressed Current Corrosionmentioning

confidence: 99%

“…Studies have been reported for improving the long term durability of these epoxy coatings by modification using nano-fillers like nano clay, inorganic nano-particles like SiO 2 , TiO 2 , ZnO, and self-healing agents, etc. [5,[34][35][36][37][38][39][40][41][42][43][44][45][46]. They have been reported to result in improved chemical resistance, better scratch and abrasion resistance and corrosion resistance of the epoxy coatings, and enhanced mechanical strength as compared to pure epoxy coatings.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of corrosion inhibition capability of graphene modified epoxy coatings on reinforcing bars in concrete

Sharma

et al. 2022

Construction and Building Materials

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“…For example, tung oil was used as a modifier to polymerize cross‐linked sulfur polymer cement, 9 and was used as a regeneration agent to promote the regeneration of asphalt 10 . Tung oil was also utilized in the degradation of hydrated sand, 11 the corrosion inhibition of the rebars, 12 as well as the synthesis of bio composites 13–17 and polymers 18–20 . However, the types of tung oil used in these experiments were not distinguished clearly; the different types of raw tung oil or ripe tung oil might affect the physical or chemical properties of the synthesized materials or films, Accordingly, the adequate analytical techniques are required to figure out the differences between raw tung oil and ripe tung oil before applications, which is beneficial for the preparation of polymers, the inhibition of corrosions, and establishment of the restoration strategy for ancient buildings.…”

Section: Introductionmentioning

confidence: 99%

Efficient identification of raw and ripe tung oil using headspace GC–MS

Qiu

Zhao

et al. 2021

Rapid Comm Mass Spectrometry

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To differentiate between the raw type and ripe type of tung oil, it is important to distinguish between the types of tung oil before its application. In the present work, an efficient headspace gas chromatography‐mass spectrometry (HS‐GC–MS) method was developed for identifying eight samples T1–T8, including the raw tung oil and ripe tung oil. The HS‐GC–MS experiments results showed that octanoic acid existed only in ripe tung oil of T2, T4, T6, T8, not in raw tung oil of T1, T3, T5, T7. Combined with structural characterization by tandem mass spectrometry, octanoic acid was screened as an effective marker for distinguishing between raw tung oil and ripe tung oil. Then, the HS‐GC–MS method was applied into the putty samples of X1 (raw tung oil with lime) and X2 (ripe tung oil with lime) and successfully identified the samples X1 mixed with raw tung oil and X2 mixed with ripe tung oil. The further validations results suggested that the detection limit of our HS‐GC–MS method could reach 1.05 mg/L for octanoic acid, whereas the detection limit of derivative gas chromatography‐mass spectrometry (DR‐GC–MS) method was 2.74 mg/L for methyl octanoate. The investigation results can also provide the useful information and technical support for the selection of restoration materials and technology in ancient buildings.

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Evaluation of corrosion inhibition and self healing capabilities of nanoclay and tung oil microencapsulated epoxy coatings on rebars in concrete

Cited by 42 publications

References 71 publications

Self-Healing Performance of Smart Polymeric Coatings Modified with Tung Oil and Linalyl Acetate

Self-Healing Performance of Smart Polymeric Coatings Modified with Tung Oil and Linalyl Acetate

Evaluation of corrosion inhibition capability of graphene modified epoxy coatings on reinforcing bars in concrete

Efficient identification of raw and ripe tung oil using headspace GC–MS

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