Melamine-formaldehyde microcapsules encapsulating HEDP for sustained scale inhibition

Zhou, Yixi; Cui, Yexiang; Wang, Xiao; Zhang, Meng; Gao, Yuliang; Wang, Huaiyuan

doi:10.1016/j.colsurfa.2021.127361

Cited by 12 publications

(4 citation statements)

References 42 publications

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“…Their performance and core material activity were further evaluated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) in a nitrogen atmosphere, with a heating rate of 10 • C/min from 0 • C to 800 • C, using a simultaneous TG-DSC analyzer (METTLER 1100LF, Mettler Toledo, Urdorf, Switzerland). The particle size analysis of the microcapsules was conducted using Nano Measure software 1.2, with 100 samples chosen for analysis based on the SEM images obtained [43].…”

Section: Characterization Of Microcapsulesmentioning

confidence: 99%

“…In recent years, microcapsule technology has seen broad application across various fields, including medicine [28,29], coatings [30][31][32][33], food [34][35][36][37], and agriculture [38,39]. However, the slow repair rate of microcapsules [40], the selection of healing agents [21,25,41], and the development of effective encapsulation [42][43][44][45] and release control methods [46][47][48][49] continue to be major research focuses and challenges.…”

Section: Introductionmentioning

confidence: 99%

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Dual Microcapsules Encapsulating Liquid Diamine and Isocyanate for Application in Self-Healing Coatings

Mu,

Deng,

Zou

et al. 2024

Coatings

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Dual microcapsule systems, especially those based on the polyurea matrix, have emerged as pivotal components driving innovation in self-healing materials, thanks to the intrinsic properties of polyurea, primarily diamine and diisocyanate, rendering it an optimal choice for enhancing self-healing coatings. However, the encapsulation of polyurea components is fraught with substantial technical hurdles. Addressing these challenges, a novel methodology has been devised, leveraging n-heptane as a solvent in the liquid diamine emulsion process to facilitate the synthesis of diamine microcapsules. These microcapsules exhibit a uniform spherical morphology and a robust shell structure, with an encapsulated core material ratio reaching 39.69%. Analogously, the encapsulation process for diisocyanate has been refined, achieving a core material percentage of 10.05 wt. %. The integration of this bifunctional microcapsule system into diverse polymeric matrices, including epoxy resins and polyurethanes, has been demonstrated to significantly enhance the self-healing efficacy of the resultant coatings. Empirical validation through a series of tests, encompassing scratch, abrasion, and saltwater immersion assays, has revealed self-healing efficiencies of 21.8% and 33.3%, respectively. These results indicate significant improvements in the durability and self-repair capability of coatings, marking a notable advancement in self-healing materials with promising potential for tailored applications in automotive, aerospace, and construction industries.

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Section: Characterization Of Microcapsulesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dual Microcapsules Encapsulating Liquid Diamine and Isocyanate for Application in Self-Healing Coatings

Mu,

Deng,

Zou

et al. 2024

Coatings

View full text Add to dashboard Cite

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“…[1][2][3][4] . Scaling is very common and di cult to solve in various places such as circulating cooling water systems, desalination units, water pipelines, heat exchangers, and especially oil and gas production equipment, and if left untreated, it may even lead to the destruction of strata, making it one of the most di cult problems to solve [5][6][7][8][9] . Generally, the scale formation process involves four stages: aggregation, nucleation, crystal growth, and agglomeration [10,11] .…”

Section: Introductionmentioning

confidence: 99%

Study on the sustained release behavior of a slow-release scale-inhibiting material

Xiao,

Hao,

Zhao

2024

J Polym Res

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The phenomenon of scaling has caused great damage in many industrial production sites, especially in oil and gas eld production equipment, and adding scale inhibitors is currently the most effective and commonly used method. However, this method also has the disadvantage of not being able to continuously and effectively remove scale. When there is too little scale inhibitor, it cannot have the effect of scale inhibition, but excessive scale inhibitor may lead to pseudo scaling and serious pipeline corrosion, or even environmental problems. To solve this problem, in this paper, we designed to use the degradable material polylactic acid (PLA) as the carrier, and mixed PLA with the scale inhibitor ethylenediamine tetramethylene phosphonic acid (EDTMPA) to obtain the sustained-release scale inhibition material. The sustained-release performance of the composite material was investigated through static and dynamic release experiments, and at the same time, the inhibition rate of the scale inhibitor in the process of sustained release was also investigated. Scanning electron microscopy (SEM) was used to analyze the morphology of the samples before and after the release of scale inhibitor, and the crystalline phases of calcium carbonate scale samples before and after the addition of scale inhibitors were analyzed by X-ray diffraction (XRD). The results indicate that the prepared composites can continuously release the scale inhibitor for more than 70 days, and have scale inhibition capability throughout the continuous release process. The scale inhibitor released by the slow-release scaleinhibiting material can both inhibit the formation of calcium carbonate and also destroy the calcium carbonate structure formed in the presence of the scale inhibitor, leading to lattice distortion and realizing continuous scale inhibition. This study provides a new strategy to realize the slow-release of scale inhibitors, and the prepared slow-release scale-inhibiting materials have a broad application prospect in the industry.

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“…Pesticide microcapsules tend to employ natural, seminatural, or synthetic polymer materials to encapsulate active pesticide components as tiny particles by means of physical, chemical, and physical and chemical methods; this technology has been shown to achieve controlled release of the encapsulated pesticides. , To date, various methods have been reported for the preparation of microcapsules, including in situ polymerization, interfacial polymerization, emulsion polymerization, and solvent evaporation, among others. − Interfacial polymerization is one of the most common methods used to produce pesticide microcapsules, wherein the microcapsules are synthesized at the interface between the two phases. For example, interfacial polymerization has become the main method for microcapsule preparation in the field of pesticides because of its rapid encapsulation reaction, mild reaction conditions, and low degree of penetrability. , In this context, the main-chain polymer polyurethane (PU) exhibits attractive mechanical and chemical properties, in addition to presenting a good environmental safety profile. , As a result, PU has been widely used in various fields, and with regard to this work, PU is expected to improve pesticide stability, prolong its validity period, and reduce the toxicity of the pesticide to humans, animals, and environmental organisms.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Avermectin B2 Microcapsules and Effective Control of Root-Knot Nematodes

Wang

Yan

et al. 2023

ACS Omega

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Polyurethane microcapsules of avermectin B2 were prepared by means of interfacial polymerization with methylene diphenyl diisocyanate as the wall material and triethanolamine as the initiator. The microcapsules were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The surfaces of the microcapsules were found to be smooth and almost spherical, and the encapsulation efficiency was high. The avermectin B2 microcapsules exhibited a good diffusion-controlled sustained-release performance, giving a cumulative release rate of 91.81%. The results indicated that the polyurethane capsule protected against the photolysis of avermectin B2. Finally, the microcapsules exhibited good soil leaching properties and were able to control the population of root-knot nematodes with an efficacy of 80.80%.

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Melamine-formaldehyde microcapsules encapsulating HEDP for sustained scale inhibition

Cited by 12 publications

References 42 publications

Dual Microcapsules Encapsulating Liquid Diamine and Isocyanate for Application in Self-Healing Coatings

Dual Microcapsules Encapsulating Liquid Diamine and Isocyanate for Application in Self-Healing Coatings

Study on the sustained release behavior of a slow-release scale-inhibiting material

Preparation and Characterization of Avermectin B2 Microcapsules and Effective Control of Root-Knot Nematodes

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