Salicylhydroxamic Acid as a Novel Switchable Adhesive Molecule
Salicylhydroxamic Acid as a Novel Switchable Adhesive Molecule
复制标题
DOI：
10.1021/acs.chemmater.3c00508
复制
发表时间：
2023-07
影响因子：
8.6
通讯作者：
Kan Wang;L. Patra;Bo Liu;Zhongtian Zhang;R. Pandey;Bruce P. Lee
中科院分区：
文献类型：
--
作者：
Kan Wang;L. Patra;Bo Liu;Zhongtian Zhang;R. Pandey;Bruce P. Lee
水杨基异羟肟酸（SHAM）作为一个pH值响应，可切换的粘合剂分子的可行性进行了探讨。使用定制的Johnson-Kendall-Roberts接触力学测试装置，含SHAM的粘合剂在pH 5下表现出对各种表面（玻璃、钛、聚苯乙烯和胺官能化玻璃）的强的湿粘合性，其粘合性能与邻苯二酚的粘合性能相当。SHAM的粘附功随着pH的增加而降低近98%，当用pH 5处理时完全恢复。最令人印象深刻的是，SHAM甚至在暴露于高达11的pH值后也恢复了其粘合性能，表明对碱处理具有上级稳定性。该结果与邻苯二酚的情况形成对比，邻苯二酚由于不可逆氧化而不能恢复其初始粘合性能。最后，密度泛函理论计算被用来确认所观察到的可调粘附性能是由于SHAM的去质子化。
The feasibility of salicylhydroxamic acid (SHAM) to function as a pH-responsive, switchable adhesive molecule is explored here. Using a custom-built Johnson–Kendall–Roberts contact mechanics test setup, SHAM-containing adhesive demonstrated strong, wet adhesion to various surfaces (glass, titanium, polystyrene and amine-functionalized glass) at pH 5 with adhesive properties that were comparable to those of catechol. The work of adhesion of SHAM decreased by nearly 98% with increasing pH and fully recovered when treated with pH 5. Most impressively, SHAM recovered its adhesive property even after its exposure to pH as high as 11, indicating superior stability toward base treatment. This result contrasts the case of catechol, which did not recover its initial adhesive property due to irreversible oxidation. Finally, density functional theory calculations were used to confirm that the observed tunable adhesion property was due to the deprotonation of SHAM.