The role of coacervation and phase transitions in the sandcastle worm adhesive system

Russell J. Stewart, Ching Shuen Wang, In Taek Song, Joshua P. Jones

研究成果: 雜誌貢獻回顧型文獻同行評審

107 引文 斯高帕斯(Scopus)


Sandcastle worms, Phragmatopoma californica (Fewkes), live along the western coast of North America. Individual worms build tubular shells under seawater by gluing together sandgrains and biomineral particles with a multipart, rapid-set, self-initiating adhesive. The glue comprises distinct sets of condensed, oppositely charged polyelectrolytic components—polyphosphates, polysulfates, and polyamines—that are separately granulated and stored at high concentration in distinct cell types. The pre-organized adhesive modules are secreted separately and intact, but rapidly fuse with minimal mixing and expand into a crack-penetrating complex fluid. Within 30 s of secretion into seawater, the fluid adhesive transitions (sets) into a porous solid adhesive joint. The nano- and microporous structure of the foamy solid adhesive contributes to the strength and toughness of the adhesive joint through several mechanisms. A curing agent (catechol oxidase), co-packaged into both types of adhesive granules, covalently cross-links the adhesive and becomes a structural component of the final adhesive joint. The overall effectiveness of the granulated sandcastle glue is more a product of the cellular sorting and packaging mechanisms, the transition from fluid to solid following secretion, and its final biphasic porous structure as it is of its composition or any particular amino acid modification.
頁(從 - 到)88-96
期刊Advances in Colloid and Interface Science
出版狀態已發佈 - 1月 1 2017

ASJC Scopus subject areas

  • 表面和介面
  • 物理與理論化學
  • 膠體和表面化學


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