通过无表面活性剂的乳液聚合制备的富含基因的斑块性聚合物合物.
Eva C Morgenthaler1, Alexander E Ribbe1, Laura C Bradley1
1Polymer Science & Engineering Department, 120 Governors Drive, University of Massachusetts, Amherst, MA, 01003.
Journal of colloid and interface science
|October 25, 2024
概括
没有表面活性剂的乳液聚合产生了没有传统表面活性剂的功能性聚合物纳米粒子. 这种方法可以产生用于点击化学的可调节颗粒,并揭示了合成过程中相位分离的洞察力.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 自由基聚合对于微米以下的聚合物颗粒来说是常见的.
- 传统方法通常需要表面活性剂,这可能是不受欢迎的.
- 无表面活性剂乳液聚合 (SFEP) 为功能粒子合成提供了一个潜在的替代方案.
研究的目的:
- 评估SFEP在制备功能性聚合物颗粒方面的有效性.
- 为了研究单体选择和比例对粒子特性的影响.
- 为了证明SFEP衍生颗粒在随后的化学反应中的实用性.
主要方法:
- 使用SFEP与甲基烯酸 (PA), styrene (Sty) 和 tert-butyl acrylate (t-BA) 等单体的溶液聚合.
- 使用电子显微镜 (包括反向散射) 和红外光谱学进行表征.
- 评估颗粒的大小,形状,表面特性和化学成分.
主要成果:
- 在60-300nm范围内,SFEP成功生产了球形聚合物颗粒 (同聚合物和共聚合物).
- 含有PA的颗粒适用于铜催化化-基环添加 (CuAAc) 反应.
- 电子显微镜揭示了共聚物颗粒中的化学和形状异构,表明单体相分离.
结论:
- SFEP是一种多功能的一制方法,用于创建功能性聚合物颗粒.
- 该方法避免使用传统的表面活性剂.
- SFEP提供了一种简单的方法来产生多种功能性聚合物合物.
相关概念视频
01:20Anionic 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
02:34Polymers
35.2K
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...
35.2K
03:22Colloids
17.4K
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...
17.4K
02:35Free-Radical Chain Reaction and Polymerization of Alkenes
7.7K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
7.7K