関連する実験動画
Updated: Jan 5, 2026

09:31
Calcium Carbonate Formation in the Presence of Biopolymeric Additives
Published on: May 14, 2019
17.3K
カルシウム炭酸のコンフォーマブル前駆体としてのクロスリンクイオンオリゴーマー
Zhaoming Liu1, Changyu Shao1, Biao Jin1
1Department of Chemistry, Zhejiang University, Hangzhou, China.
Nature
|October 18, 2019
まとめ
ポリマー化学に触発されたイオンオリゴーマーをクロスリンクすることで 連続的に構造化された無機物質を作り出しました この新しい方法は,複雑な形状の単体炭酸カルシウムを迅速かつ大規模に生産することを可能にします.
科学分野:
- 材料科学
- 無機化学
- ポリマー化学
背景:
- 建築,光学,工学,バイオ材料に不可欠です
- 古典的な結晶化方法はしばしば粉末を生み出し,連続した無機構造の形成を制限する.
- 既存の非古典的な結晶化前駆物は,大規模なモノリト製剤に制限があります.
研究 の 目的:
- 連続した構造を持つ無機材料の構築のための新しい方法を開発する.
- 大規模なモノリットの製造のための現在の前駆者の限界を克服する.
- ポリマークロスリンクの原理を無機材料合成に適応する.
主な方法:
- トリエチラミンをキャピング剤として使用した制御された分子量を持つカルシウム炭酸 (CaCO3) オリゴーマー ((CaCO3) n) を合成した.
- トライエチラミンキャピング剤を除去することによって,オリゴマーのクロスリンクを開始します.
- 複雑な形状を成形するための流体のようなオリゴマーの前身の処理性を示した.
主要な成果:
- 連続した内部構造を持つ純粋な単体カルシウム炭酸と単体結晶を成功裏に生産しました.
- オリゴーマー・クロスリンクを通じて無機材料の急速な構築を達成した.
- 先駆者を複雑で変化する形状に 変形させる能力を示した
結論:
- イオン性オリゴマーの交互結合による無機材料の構築のための新しい戦略を導入した.
- 材料製造のための無機化学とポリマー化学の融合原理
- 継続的に構造化された無機材料のスケーラブルで多用途な生産を可能にしました.
さらに関連する動画
関連する概念動画
Ionic Bonds
127.2K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
127.2K
Ion Exchange
1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
Ionic Compounds: Formulas and Nomenclature
85.7K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
85.7K
Alkali Aggregate Reaction in Concrete
438
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
438
Hydration of Cement
738
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
738
Additives and Fillers in Concrete
298
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
The...
298

