Influences of Phosphates on the Adhesion of a Catechol-Containing Polymer,ACS Applied Polymer Materials

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Influences of Phosphates on the Adhesion of a Catechol-Containing Polymer
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2020-09-15 , DOI: 10.1021/acsapm.0c00699
Taylor A. Jones ₁ , Jonathan J. Wilker ₂

Affiliation

Bioadhesives are popular characterization targets for informing the design of synthetic materials. Many naturally occurring adhesive proteins are phosphorylated, yet we do not know why phosphorylation might be so prevalent in nature. Here, phosphate-containing biomimetic polymers were made using the chemistry of catechol, or 3,4-dihydroxyphenylalanine, for adhesion. Structure–function studies were carried out with this family of poly(catechol-phosphate) polymers to determine how phosphate groups influence bulk adhesion. Bonding was studied both dry and underwater. Under some conditions, polymers containing phosphate groups exhibited extreme levels of surface wetting on steel substrates. Dry adhesion increased moderately with greater phosphate content in the polymers. Underwater bonding was weaker than dry and achieved, only to a limited degree, when the polymer phosphate content was high. These results indicate that phosphates may provide an aid to the more impactful adhesive properties of catechols. Such insights may also help to explain the existence of phosphates in bioadhesives as well as inform the future design of high-performance materials.

中文翻译：

磷酸盐对含邻苯二酚聚合物的附着力的影响

生物粘合剂是告知合成材料设计的流行特征指标。许多天然存在的黏附蛋白被磷酸化，但是我们不知道为什么磷酸化在自然界可能如此普遍。在此，使用邻苯二酚或3,4-二羟基苯丙氨酸的化学作用来制备含磷酸盐的仿生聚合物，以提高附着力。使用该聚（邻苯二酚-磷酸酯）聚合物家族进行了结构功能研究，以确定磷酸酯基团如何影响本体粘合。在干燥和水下均研究粘合。在某些条件下，含磷酸盐基团的聚合物在钢基材上表现出极高的表面润湿性。随着聚合物中磷酸盐含量的增加，干附着力适度增加。水下粘合比干燥弱，只能在有限的程度上实现，当聚合物磷酸盐含量高时。这些结果表明，磷酸盐可有助于邻苯二酚的更有效的粘合性能。这些见解还可能有助于解释生物粘合剂中磷酸盐的存在，以及为高性能材料的未来设计提供依据。

更新日期：2020-11-13

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