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関連する概念動画

Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

2.0K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
2.0K
Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

4.6K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
4.6K
Precipitation Processes01:12

Precipitation Processes

4.6K
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
4.6K
Colloidal precipitates01:09

Colloidal precipitates

4.7K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
4.7K
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism01:21

Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism

637
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
637
Types of Coprecipitation01:10

Types of Coprecipitation

4.8K
Coprecipitation is the contamination of a precipitate by otherwise soluble species and occurs via different processes. In colloidal precipitates, coprecipitation occurs via surface adsorption. For instance, barium sulfate has a primary layer of adsorbed barium ions and a secondary layer of nitrate counterions. This results in contamination of the precipitate by barium nitrate.
Sometimes, ions in a crystal lattice can undergo isomorphous replacement by inclusions of similar charge and size. For...
4.8K

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関連する実験動画

Updated: Jan 8, 2026

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
07:32

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns

Published on: April 10, 2017

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異なる濡れ表面上での不均一な結晶化

Tiantian Li1, Jianwen Zhang1, Jiashun Li1

  • 1State Key Laboratory for Environment-Friendly Energy Materials, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang 621010, PR China.

Langmuir : the ACS journal of surfaces and colloids
|December 23, 2025
PubMed
まとめ

表面の濡れを改善すると核生成障壁が向上し、結晶化とスケールが阻害されます。ミクロンナノ構造などの安定した超疎水性表面は、長期的な防スケール用途において炭酸カルシウムスケールを大幅に低減します。

キーワード:
表面濡れ結晶化スケール防止超疎水性表面炭酸カルシウム

さらに関連する動画

Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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関連する実験動画

Last Updated: Jan 8, 2026

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
07:32

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Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
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Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
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科学分野:

  • 材料科学
  • 表面化学
  • ナノテクノロジー

背景:

  • 固体-液体界面でのスケール形成は、パイプライン輸送や金属防食などの産業用途において課題となります。
  • 効果的な防スケールソリューションを開発するには、表面の濡れ状態と結晶化阻害の関係を理解することが不可欠です。

研究 の 目的:

  • 様々な濡れ状態（平坦、ミクロン、ナノ、ミクロンナノ）の表面におけるスケール形成メカニズムを調査すること。
  • 長期的な防スケール用途における安定した超疎水性表面の可能性を探求すること。

主な方法:

  • 4つの代表的な表面構造（平坦、ミクロン、ナノ、ミクロンナノ）の作製。
  • 異なる濡れ状態における不均一核生成障壁の評価。
  • 42日間および動的条件下での様々な表面における炭酸カルシウム（CaCO3）スケール率の評価。

主要な成果:

  • 強化された濡れ状態は、不均一な核生成障壁に積極的に影響を与え、結晶化を阻害します。
  • Cassie状態の超疎水性表面は高い核生成障壁を示しますが、Wenzel状態に移行する可能性があり、長期的な防スケールが制限されます。
  • ミクロンナノ表面は優れた安定性を示し、42日後にCaCO3スケール率を1.24 mg/cm2から0.335 mg/cm2に低減しました。

結論:

  • 長期的な防スケールを実現するには、安定したCassie状態の超疎水性が必要です。
  • 産業環境における効果的な防スケールソリューションには、安定した超疎水性に焦点を当てた表面設計戦略が不可欠です。