東華大學圖書館 |

Elucidating Molecular Behaviors of Polymers, Proteins, and Surfactants at Buried Interfaces Using Sum Frequency Generation Vibrational Spectroscopy /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Elucidating Molecular Behaviors of Polymers, Proteins, and Surfactants at Buried Interfaces Using Sum Frequency Generation Vibrational Spectroscopy // Jinpeng Gao.
作者:	Gao, Jinpeng,
面頁冊數:	1 electronic resource (150 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
Contained By:	Dissertations Abstracts International86-03B.
標題:	Chemistry. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31631396
ISBN:	9798384044109

Elucidating Molecular Behaviors of Polymers, Proteins, and Surfactants at Buried Interfaces Using Sum Frequency Generation Vibrational Spectroscopy /
Gao, Jinpeng,

Elucidating Molecular Behaviors of Polymers, Proteins, and Surfactants at Buried Interfaces Using Sum Frequency Generation Vibrational Spectroscopy /Jinpeng Gao. - 1 electronic resource (150 pages)

Source: Dissertations Abstracts International, Volume: 86-03, Section: B.

The way molecules behave at the interfaces where different materials meet plays a key role in how these materials can separate or come together, affecting their overall characteristics. Understanding the structure of molecules at these interfaces is crucial for creating new materials with desired properties. This thesis utilizes sum frequency generation (SFG) vibrational spectroscopy to investigate interfacial molecular interactions and structures. From the detailed investigation of the interfacial adsorption behavior and antifouling capabilities of polymers to the optimization of oil-water separation processes, and the reinforcement attributes of carbon fiber-reinforced polymers (CFRPs), each research facet unveils unique molecular insights. The first project presented in this thesis reveals the interfacial adsorption behavior and antifouling mechanisms of a copolymer designed for resisting malodor for laundry formulation using SFG. It is found that the copolymer actively segregates to a model textile surface with and without the presence of detergent surfactants, and effectively prevents/reduces protein adsorption. Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D) is used to provide supplemental information on the copolymer and protein adsorption behavior, which can be qualitatively correlated to SFG results (Chapter 2). Further SFG studies are performed to examine the molecular structures of an adhesive protein fibrinogen adsorbed on the model textile surface with and without adsorbed surfactants, using a newly developed Hamiltonian SFG data analysis methodology. QCM-D is also used to study the interfacial copolymer adsorption and antifouling activity. The QCM-D results can be quantitatively correlated to the SFG data presented in Chapter 2. This research provides further in-depth understanding of the interfacial behaviors and interactions of copolymer, surfactant, and protein at buried solid/liquid interface. This study also underscores the combined use of SFG and QCM-D in advancing our understanding of molecular interfacial interactions (Chapter 3). SFG is also applied to study interfacial behavior of surfactants and protein at oil/water interfaces. It is found that surfactant molecules can disrupt or remove proteins at the corn oil/water interface, facilitating the oil-water separation. Here SFG is used to study interactions between interfacial glutelin molecules and a conventional surfactant as well as an extended surfactant. Under certain conditions (high temperature and with salt in the solution), extended surfactant can disrupt/remove interfacial glutelin faster, demonstrating the feasibility of using extended surfactant in oil-water separations (Chapter 4). SFG is used to study interfacial behavior of a sizing agent (composed of polyethyleneimine or PEI and surfactants) used to enhance wettability and adhesion between polymer matrices and carbon fibers, supplemented by interfacial tension measurements. It is found that the interfacial tension is mainly determined by the surfactant molecules in the sizing mixture, while SFG can provide more details regarding the interfacial behaviors of both PEI and surfactant (Chapter 5). In summary, this thesis applies SFG to elucidate molecular structures and behaviors of polymers, surfactants, and proteins at buried solid/liquid and liquid/liquid interfaces in situ in real time. Such knowledge is crucial for understanding interfacial interactions and interfacial properties, guiding the design and optimization of interfaces with desired functions. Interfaces are important in many applications ranging from antifouling coatings to oil-water separation, to polymer composites, and beyond.

English

ISBN: 9798384044109Subjects--Topical Terms:

516420
Chemistry.
Subjects--Index Terms:

Sum frequency generation

Elucidating Molecular Behaviors of Polymers, Proteins, and Surfactants at Buried Interfaces Using Sum Frequency Generation Vibrational Spectroscopy /
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520 $a The way molecules behave at the interfaces where different materials meet plays a key role in how these materials can separate or come together, affecting their overall characteristics. Understanding the structure of molecules at these interfaces is crucial for creating new materials with desired properties. This thesis utilizes sum frequency generation (SFG) vibrational spectroscopy to investigate interfacial molecular interactions and structures. From the detailed investigation of the interfacial adsorption behavior and antifouling capabilities of polymers to the optimization of oil-water separation processes, and the reinforcement attributes of carbon fiber-reinforced polymers (CFRPs), each research facet unveils unique molecular insights. The first project presented in this thesis reveals the interfacial adsorption behavior and antifouling mechanisms of a copolymer designed for resisting malodor for laundry formulation using SFG. It is found that the copolymer actively segregates to a model textile surface with and without the presence of detergent surfactants, and effectively prevents/reduces protein adsorption. Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D) is used to provide supplemental information on the copolymer and protein adsorption behavior, which can be qualitatively correlated to SFG results (Chapter 2). Further SFG studies are performed to examine the molecular structures of an adhesive protein fibrinogen adsorbed on the model textile surface with and without adsorbed surfactants, using a newly developed Hamiltonian SFG data analysis methodology. QCM-D is also used to study the interfacial copolymer adsorption and antifouling activity. The QCM-D results can be quantitatively correlated to the SFG data presented in Chapter 2. This research provides further in-depth understanding of the interfacial behaviors and interactions of copolymer, surfactant, and protein at buried solid/liquid interface. This study also underscores the combined use of SFG and QCM-D in advancing our understanding of molecular interfacial interactions (Chapter 3). SFG is also applied to study interfacial behavior of surfactants and protein at oil/water interfaces. It is found that surfactant molecules can disrupt or remove proteins at the corn oil/water interface, facilitating the oil-water separation. Here SFG is used to study interactions between interfacial glutelin molecules and a conventional surfactant as well as an extended surfactant. Under certain conditions (high temperature and with salt in the solution), extended surfactant can disrupt/remove interfacial glutelin faster, demonstrating the feasibility of using extended surfactant in oil-water separations (Chapter 4). SFG is used to study interfacial behavior of a sizing agent (composed of polyethyleneimine or PEI and surfactants) used to enhance wettability and adhesion between polymer matrices and carbon fibers, supplemented by interfacial tension measurements. It is found that the interfacial tension is mainly determined by the surfactant molecules in the sizing mixture, while SFG can provide more details regarding the interfacial behaviors of both PEI and surfactant (Chapter 5). In summary, this thesis applies SFG to elucidate molecular structures and behaviors of polymers, surfactants, and proteins at buried solid/liquid and liquid/liquid interfaces in situ in real time. Such knowledge is crucial for understanding interfacial interactions and interfacial properties, guiding the design and optimization of interfaces with desired functions. Interfaces are important in many applications ranging from antifouling coatings to oil-water separation, to polymer composites, and beyond.
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650 4 $a Materials science. $3 543314
650 4 $a Polymer chemistry. $3 3173488
650 4 $a Analytical chemistry. $3 3168300
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653 $a Surfactants
653 $a Oil-water separation
653 $a Carbon fiber-reinforced polymers
653 $a Material properties
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710 2 $a University of Michigan. $b Chemistry. $e degree granting institution. $3 3821683
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791 $a Ph.D.
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