一种可逆的水基静电粘合剂
Adriana Sierra-Romero1, Katarina Novakovic1, Mark Geoghegan1
1School of Engineering, Newcastle University, Newcastle Upon Tyne, NE1 7RU, UK.
Angewandte Chemie (International ed. in English)
|October 29, 2023
概括
研究人员开发了一种新的可逆静电粘合剂,具有中间粘合强度. 这种具有成本效益的水基粘合剂在困难的表面上具有良好的粘合性,并支持可持续的回收应用.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 粘附科学 粘附科学 粘附科学
背景情况:
- 商业粘合剂通常是结构性的 (共价键,高强度) 或压力敏感的 (物理键,方便性).
- 需要具有可调节的粘合强度,可逆性和适用于各种应用的粘合剂.
研究的目的:
- 引入一种新型类型的可逆静电粘合剂.
- 证明它们在低能耗表面的性能以及适合回收和拆卸.
主要方法:
- 使用相反电荷的多电解质制造水基粘合剂.
- 采用烯和丁烯酸盐的乳液共聚化,以实现经济高效的生产.
- 纳入生物基材料,以提高可持续性.
主要成果:
- 静电粘合剂具有中间的粘合强度,可以通过pH调节.
- 在像聚烯这样的低能耗表面上达到强的粘附性.
- 在潮湿的环境中表现出强大的粘附力,没有显著的降解.
- 促进了大规模的包装回收和电子/汽车部件的拆卸.
结论:
- 这种新的静电粘合剂提供了可逆性,可调性强度和对具有挑战性的表面良好的粘合力的独特组合.
- 其具有成本效益的生产和可持续性特征使其适用于工业应用,包括回收和组件拆卸.
相关概念视频
01:14Adhesion
40.0K
Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
Capillary action is a result of water’s adhesive tendencies. When a narrow...
Capillary action is a result of water’s adhesive tendencies. When a narrow...
40.0K
01:22Waterproofing and Anti-Bacterial Admixtures in Concrete
82
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
82