Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


WangXiaoteng.the (final comments 3).pdf (2.16 MB)

ETD Abstract Container

Abstract Header

Directed Nano-Patterning of Polymer Nanocomposite Thin Films

Wang, Xiaoteng
http://rave.ohiolink.edu/etdc/view?acc_num=akron1462141968

Abstract Details

2016, Master of Science, University of Akron, Polymer Engineering.
Polymer-nanoparticle (NP) composites have been studied extensively as a core material that exhibits advantageous optical, electrical and mechanical properties in nanotechnology. It has been well-established that a specific distribution state of nanoparticles in a polymer matrix is the key issue to optimize a desired polymer nanocomposite (PNC) property. However effective way of controlling the spatial distribution of nanoparticles is still a recurring challenge. Here we demonstrated facile processing approach to fabricate nanocomposite thin films with controlled nanoparticle dispersion state by exploiting the entropic interactions, thereby controlling the macroscopic performance of the material. The interactions of nanoparticles with polymers are mediated by the ligands attached to the nanoparticles. Location and dispersion of polystyrene grafted titanium dioxide (PS-g-TiO2) and hydroxyl-functionalized polyhedral oligomeric silsesquioxanes (DPOSS) molecular nanoparticles in homopolymer matrices under various annealing conditions were investigated. PS-g-TiO2 NP filled low molecular weight polystyrene thin films were thermally annealed under nanoscale pattern confinement, which was fabricated by imprinting digital recording media discs (DVD) pattern onto polydimethylsiloxane (PDMS). The NP dispersion changed from randomly distributed to aggregating at the elevated regions of the imprinted films due to the entropic interaction caused by the size difference between the particles and the matrix chains. DPOSS-PS is a type of giant shape amphiphiles which are built up by covalent bonding of molecular nanoparticles. When added to low molecular weight homopolymer matrices, DPOSS-PS nanoparticles exhibited better dispersion in PMMA than in PS matrix. Additionally, to understand the morphology transition and phase separation kinetics, various loading fraction of DPOSS-PS were incorporated into PMMA matrix. Phase separation at multiple length scales was observed when the composition of DPOSS-PS is in the range of 5% and 70%.
Alamgir Karim, Dr. (Advisor)
Xiong Gong, Dr. (Committee Member)
Younjin Min, Dr. (Committee Member)
75 p.
Nanoscience; Polymers
Nanoparticle; polymer nanocomposite; lithography

Recommended Citations

Citations

  • Wang, X. (2016). Directed Nano-Patterning of Polymer Nanocomposite Thin Films [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462141968

    APA Style (7th edition)

  • Wang, Xiaoteng. Directed Nano-Patterning of Polymer Nanocomposite Thin Films . 2016. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1462141968.

    MLA Style (8th edition)

  • Wang, Xiaoteng. "Directed Nano-Patterning of Polymer Nanocomposite Thin Films ." Master's thesis, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1462141968

    Chicago Manual of Style (17th edition)

akron1462141968
867
© 2016, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.