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Functional polyelectrolyte nanofiber...

Li, Lei.

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Functional polyelectrolyte nanofibers by electrospinning.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Functional polyelectrolyte nanofibers by electrospinning./
作者:	Li, Lei.
面頁冊數:	167 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-07, Section: B, page: 3735.
Contained By:	Dissertation Abstracts International66-07B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3182507
ISBN:	054223744X

Functional polyelectrolyte nanofibers by electrospinning.
Li, Lei.

Functional polyelectrolyte nanofibers by electrospinning. - 167 p.

Source: Dissertation Abstracts International, Volume: 66-07, Section: B, page: 3735.

Thesis (Ph.D.)--University of California, Davis, 2005.

This dissertation investigates the formation, properties, and applications of nanofibers prepared from both anionic and cationic polyelectrolytes via electrospinning technology. Because the electric force is utilized to form polymer fibers in electrospinning, the charge property of polymer solutions is one of the most investigated solution properties. The charges in the polymer solutions are usually adjusted by introducing small salts. However, the built-in charges of polymers such as polyelectrolytes may affect the fiber formation differently during electrospinning because of the nature of polymeric charges. Polyelectrolyte molecules are not able to move around in the solution as freely as the small charge carriers such as inorganic salts. Meanwhile, the interactions among the charges on polyelectrolyte molecules and their counter ions in the solution have great effects on the conformation of polyelectrolyte molecules, and thus the solution properties. It is, therefore, of fundamental interest to understand how charges in the polyelectrolyte solutions affect the formation and properties of the electrospun polyelectrolyte fibers. Furthermore, due to their environmental stimuli responsive swelling behavior, polyelectrolyte hydrogels have been studied widely for potential applications in the areas of sensors, actuators, enzyme immobilization, and drug control release. Herein, the preparation of ultra-fine polyelectrolyte hydrogel fibers and their application as the enzyme immobilization substrate are also reported.

ISBN: 054223744XSubjects--Topical Terms:

1018428
Chemistry, Polymer.

Functional polyelectrolyte nanofibers by electrospinning.
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245 1 0 $a Functional polyelectrolyte nanofibers by electrospinning.
300 $a 167 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-07, Section: B, page: 3735.
500 $a Major Adviser: You-Lo Hsieh.
502 $a Thesis (Ph.D.)--University of California, Davis, 2005.
520 $a This dissertation investigates the formation, properties, and applications of nanofibers prepared from both anionic and cationic polyelectrolytes via electrospinning technology. Because the electric force is utilized to form polymer fibers in electrospinning, the charge property of polymer solutions is one of the most investigated solution properties. The charges in the polymer solutions are usually adjusted by introducing small salts. However, the built-in charges of polymers such as polyelectrolytes may affect the fiber formation differently during electrospinning because of the nature of polymeric charges. Polyelectrolyte molecules are not able to move around in the solution as freely as the small charge carriers such as inorganic salts. Meanwhile, the interactions among the charges on polyelectrolyte molecules and their counter ions in the solution have great effects on the conformation of polyelectrolyte molecules, and thus the solution properties. It is, therefore, of fundamental interest to understand how charges in the polyelectrolyte solutions affect the formation and properties of the electrospun polyelectrolyte fibers. Furthermore, due to their environmental stimuli responsive swelling behavior, polyelectrolyte hydrogels have been studied widely for potential applications in the areas of sensors, actuators, enzyme immobilization, and drug control release. Herein, the preparation of ultra-fine polyelectrolyte hydrogel fibers and their application as the enzyme immobilization substrate are also reported.
520 $a A general review of the relevant techniques and polymers is covered in Chapter 1. Chapter 2 describes the formation of ultra-fine poly(acrylic acid) (PAA) fibers. The effects of the charge density, concentration, viscosity, and the electrospinning voltage on the PAA fiber properties are investigated.
520 $a Chapter 3 reports the formation of poly(acrylic acid) (PAA)/poly(vinyl alcohol) (PVA) ultra-fine hydrogel fibers and the swelling behaviors of such ultra-fine hydrogel fibers in response to the solution pH, the ionic strength, and the electric field. In Chapter 4, a model enzyme, lipase, is immobilized on PAA/PVA ultra-fine hydrogel fibers by both physical adsorption and covalent bonding mechanisms. The loading, leaching, and activities of the immobilized lipase are studied. The preparation of porous nanofibers from the mixtures of a naturally occurring polyelectrolyte, chitosan, and PVA is discussed in Chapter 5.
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791 $a Ph.D.
792 $a 2005
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