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Examination Of The Solution Behaviors Of The Giant Inorganic-Organic Amphiphilic Hybrids

Zhang, Baofang
http://rave.ohiolink.edu/etdc/view?acc_num=akron1460369559

Abstract Details

2016, Doctor of Philosophy, University of Akron, Polymer Science.
Presently, the self-assembly behaviors of traditional small surfactants and amphiphilic block copolymers are fairly well understood. In comparison, rather little is known about the self-assembly behaviors of the giant inorganic-organic amphiphilic hybrids in solution. It remains a wide open field to explore. Giant inorganic-organic amphiphilic hybrids, consisting of nanoscale inorganic clusters and organic functional groups, represent a novel class of functional hybrid materials. They have unique physical and chemical properties and potential applications in catalysis, electronic, optics, magnetic materials, medicine and biology. Therefore, as emerging building blocks, they have promising prospects in the advanced materials. In this PhD work, several representative giant inorganic-organic amphiphilic hybrids (triangular-shaped polyoxometalate (POM)-containing inorganic/organic amphiphilic hybrids, POM-containing fluorosurfactants hybrids, POM-containing peptide hybrids POM-peptide hybrids and polyhedral oligometric silsesquioxane (POSS)-polystyrene (PS) are chosen for studying their self-assembly behaviors in solution. Based on the knowledge of the physical chemistry, colloid and polymer science, we focus on the mechanism of the self-assembly process, and the morphology control of the supramolecular structures through the internal and external conditions, such as the composition of the giant amphiphilies, molecular architectures, solvent nature, temperature, concentration, and extrally added salts. It is found that the counterion-meditated interactions dominate the self-assembly of triangular-shaped hybrids in acetone/water mixed solutions, due to the highly dominant hydrophilic portions; the solvent-swelling effect, instead of the charge effect, dominates the whole self-assembly process of the POM-containing fluorosurfactants; the analogy between small surfactants and giant amphiphiles POSS-PS allows a rough assessment of the possible morphologies of the supramolecular structures, and the particular values of the molecular packing parameter can be translated via simple geometrical relations into specific shape of the equilibrium supramolecular structures. For the experiments, laser light scattering (LLS) technique is used to monitor the entire self-assembly processes. The morphology and size of the supramolecular structures are determined by using dynamic light scattering (DLS) and static light scattering (SLS). Electron microscopies (TEM, SEM and AFM) are used to confirm the assembly structures and size. The stability of the assembly solution system is characterized by zeta potential.
Tianbo Liu (Advisor)
Stephen Cheng (Committee Member)
Mesfin Tsige (Committee Chair)
Chrys Wesdemiotis (Committee Member)
Jie Zheng (Committee Member)
120 p.
Chemical Engineering; Chemistry; Materials Science; Polymer Chemistry; Polymers
Giant inorganic-organic amphiphilic hybrids, self-assembly, laser light scattering, nanomaterials, surfactant, polyoxometalate POM, Polyhedral Oligometric Silsesquioxane POSS,Fluorosurfactants, peptide, macroions

Recommended Citations

Citations

  • Zhang, B. (2016). Examination Of The Solution Behaviors Of The Giant Inorganic-Organic Amphiphilic Hybrids [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460369559

    APA Style (7th edition)

  • Zhang, Baofang. Examination Of The Solution Behaviors Of The Giant Inorganic-Organic Amphiphilic Hybrids. 2016. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1460369559.

    MLA Style (8th edition)

  • Zhang, Baofang. "Examination Of The Solution Behaviors Of The Giant Inorganic-Organic Amphiphilic Hybrids." Doctoral dissertation, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460369559

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Akron and OhioLINK.