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The Investigation of Haliotis Rufesc...

Zhang, Anqi.

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The Investigation of Haliotis Rufescens (Red Abalone): Mesolayer Growth & Mechanical Behavior.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Investigation of Haliotis Rufescens (Red Abalone): Mesolayer Growth & Mechanical Behavior./
作者:	Zhang, Anqi.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	170 p.
附註:	Source: Dissertations Abstracts International, Volume: 84-08, Section: B.
Contained By:	Dissertations Abstracts International84-08B.
標題:	Mechanical properties. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30267208
ISBN:	9798371934277

The Investigation of Haliotis Rufescens (Red Abalone): Mesolayer Growth & Mechanical Behavior.
Zhang, Anqi.

The Investigation of Haliotis Rufescens (Red Abalone): Mesolayer Growth & Mechanical Behavior. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 170 p.

Source: Dissertations Abstracts International, Volume: 84-08, Section: B.

Thesis (Ph.D.)--Auburn University, 2017.

This item must not be sold to any third party vendors.

Self-assembly is a popular bottom-up process which results in highly-ordered and fine structures in micro- or nano-scale. The special structures produced through the self-assembly are always related to some unique and outstanding properties. Abundant research has been performed to aid in figuring out ideal ways to produce these materials for industrial applications. In the biological world, many creatures develop a self-assembly process in some of their physiological behaviors through millions of years of evolution which could inspire us with innovate ideas to produce the special and specific structure. The nacre of the abalone shell is on such example. Thus, studies of abalone nacre are helpful in learning about the design of such amazing structures, how they are formed, and the mechanical properties they possess.Nacre, which is also called "mother of pearl", is an extremely important part of abalone's shell. With the self-assembly produced structure, which is constructed from aragonite tablets connected by organic thin films, the abalone nacre demonstrates fascinating toughness. While the tidy "brick-wall" structure provides the main body of the nacre, there exists another structure in the nacre which shows obvious differences and appears throughout the nacre, especially in shells of abalone that grow in the seas (the wild abalone). It is called the mesolayer and it can be divided into three separate layers: prismatic layer, organic layer, and columnar layer. Each of them shows their own individual elastic properties. Though there has been much research performed which focuses on the tablets which make up the nacre, very limited attention has been paid to the mesolayer.The abalone creates a confined space for itself with its shell which it is attached to by a portion of its tissue known as the mantle. Abalone's nacre grows in the colloidal mucus secreted by the abalone itself in that confined space. That colloidal mucus provides the self-assembly nacre growth with an isolated and complicated environment and will ultimately act as the organic matrix in the nacre. As it is hard to observe the in-situ nacre growth, some methods were developed to assist with investigating this biomineralization process such as the Flat Pearl Method. This is the method applied in this research to determine how the seawater environment effects the mesolayer growth.The California red abalones were purchased from an abalone farm and cultured in artificial seawater. The temperature, water quality, and food were well controlled to guarantee the abalones' health and that the nacre and mesolayer could grow normally. Temperature, pH, Mg2+/Ca2+ ratio of the artificial seawater were parameters in need of control, based on literatures describing sea environment and sea creatures. Among these parameters, temperature and pH were controlled to allow the mesolayer to form. The mucus that the nacre grows from has also been observed out of abalone's body and in a mimicked confined space, and shows some interesting dendrite formation.Elastic modulus is the main mechanical property of concern in this research. Nacre samples were tested with a nanoindenter. The main composition of nacre is calcium carbonate, which can be treated as a ceramic material, and shows excellent high toughness.

ISBN: 9798371934277Subjects--Topical Terms:

3549505
Mechanical properties.

The Investigation of Haliotis Rufescens (Red Abalone): Mesolayer Growth & Mechanical Behavior.
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