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相关概念视频

Polymers02:34

Polymers

35.8K
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
35.8K
Solubility03:00

Solubility

17.5K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
17.5K
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

2.6K
Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...
2.6K
Colloids03:22

Colloids

17.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.5K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
Polymer Classification: Architecture01:14

Polymer Classification: Architecture

2.7K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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相关实验视频

Updated: Jul 11, 2025

Assembly and Characterization of Polyelectrolyte Complex Micelles
08:44

Assembly and Characterization of Polyelectrolyte Complex Micelles

Published on: March 2, 2020

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将聚合物表面活性剂复合物与聚电解质进行比较.

Isaac J Gresham1, Edwin C Johnson2, Hayden Robertson2

  • 1School of Chemical Engineering, UNSW Sydney, Sydney, 2052, NSW, Australia.

Journal of colloid and interface science
|November 9, 2023
PubMed
概括
此摘要是机器生成的。

聚合物-表面活性化合物复合物在低盐度下表现出类似聚电解质的胀,但在高盐度下抵抗崩. 封闭显示表面活性剂的体积占主导地位,与多电解质不同.

关键词:
电解质是一种电解质.聚 (((N-异烯胺) 是一种聚烯胺.聚合物刷子的使用方法响应性聚合物是一种响应性聚合物.硫酸二甲二甲基硫酸是什么表面活性剂是什么?表面活性剂是什么?

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Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure
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Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure

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Assembly and Characterization of Polyelectrolyte Complex Micelles
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Assembly and Characterization of Polyelectrolyte Complex Micelles

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Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils
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Preparation of Hollow Polystyrene Particles and Microcapsules by Radical Polymerization of Janus Droplets Consisting of Hydrocarbon and Fluorocarbon Oils

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Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure
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Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure

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科学领域:

  • 材料科学 材料科学 材料科学
  • 物理化学 物理化学
  • 聚合物科学 聚合物科学

背景情况:

  • 了解聚合物-表面活性剂相互作用对于优化商业产品,如油漆,牙膏和洗剂至关重要.
  • 中性聚合物与表面活性剂复合,形成结构,通常被描述为伪多聚电解质.

研究的目的:

  • 调查聚合物表面活性剂系统是否在盐的存在下表现得像聚电解质一样.
  • 为了确定聚合物-表面活性剂复合物是否能够抵抗几何限制,类似于聚电解质.

主要方法:

  • 研究的聚N-异烯胺 (PNIPAM) 刷与二甲基硫酸盐 (SDS) 测试伪聚电解质类比.
  • 使用光谱圆测量,石英晶体微平衡与散射监测 (QCM-D) 和中子反射测量 (NR) 来分析PNIPAM-SDS系统.
  • 使用NR. 测试了该综合体对几何限制的抵抗力.

主要成果:

  • 在固定的SDS中增加NaCl度 (<100毫米) 促进了刷子的胀,模仿由于透压力的弱聚电解质.
  • 在高NaCl度 (500毫米) 的情况下,与典型的多电解质不同,没有观察到刷子崩随着SDS的增加.
  • 在限制下,表面活性剂的物理体积显著影响了系统的结构,使其与多电解质行为区别开来.

结论:

  • 对于中性聚合物-表面活性剂复合物的伪多聚电解质类比具有局限性,特别是在高盐度和被限制条件下.
  • 聚合物表面活性剂系统表现出独特的行为,与聚电解质不同,由透压和表面活性剂体积等因素驱动.