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Master thesis of Xiaocheng Chen.pdf (1.4 MB)

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Synthesis of 10-Carboxy-N-Decyol-N, N’- Dimethyldecyl-1-Ammonium Bromide as Organogelator & Room temperature Shape Memory Programming of Stearic Acid/ Natural Rubber Bilayer Blend

Chen, Xiaocheng
http://rave.ohiolink.edu/etdc/view?acc_num=akron1500563824207268

Abstract Details

2017, Master of Science in Polymer Engineering, University of Akron, Polymer Engineering.
Quaternary ammonium compounds (QACs) are a mainstay of anti-bacterial materials which are the most effective bactericide agents against microorganisms at a neutral or slightly alkaline PH with generally low concentration. They also have numerous applications as surfactants and disinfectants in a variety of industrial and consumer applications. 10-Carboxy-N-decyl-N, N'-dimethydecyl-1-ammonium bromide is a kind of QACs which has the similar gelation ability as 12HSA because of the ion-pair effect. Nucleophilic substitution was the reaction for synthesizing this quaternary ammonium bromide compound and 1H-NMR was used to characterize the final dried products in this thesis. Then the thermal characterizations of samples were measured by TGA, DSC. In order to fabricate QAC organogelators, different solvents were mixed with QAC with different concentration and only DMSO and ethylene glycol succeeded. The final step of this experiment was to observe the crystalline formation process and structure of gels by POM. The second study focuses on shape memory polymer (SMP), a novel kind of smart material which can remember its original shape and has lots of advantages, such as high elastic but low temperature deformation, low density, low cost, better potential biocompatibility and various external stimuli more than temperature. Bilayer SMP is fabricated by creating inhomogeneous phase of material to achieve deformation purpose without external forces. This thesis first introduces the fundamental understanding of SMPs history, structure, stimulus method and categorization, and the principle of bilayer SMPs. The SMPs were fabricated with commercial readily cross-linked natural rubber bands and stearic acid in this experiment. Next, the iso-strain stress shape fixity and recovery of SMPs varying with different Stearic Acid wt%, stretch time and stretch strain under cold-drawing conditions are presented. This differs from the typically SMP processing where the sample is heated above the transition temperature of the network fixing the structure of the SMP and offers the advantages of simplified processing and energy savings. The bilayer SMPs are fabricated by gluing two different material rubber bands and then swelling them in stearic acid for different hours. The shape memory effect of bilayer products were described by their curl change.
Kevin Cavicchi (Advisor)
60 p.
Polymers
Quaternary ammonium compound, Organogelator, shape memory polymer, cold-drawing

Recommended Citations

Citations

  • Chen, X. (2017). Synthesis of 10-Carboxy-N-Decyol-N, N’- Dimethyldecyl-1-Ammonium Bromide as Organogelator & Room temperature Shape Memory Programming of Stearic Acid/ Natural Rubber Bilayer Blend [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1500563824207268

    APA Style (7th edition)

  • Chen, Xiaocheng. Synthesis of 10-Carboxy-N-Decyol-N, N’- Dimethyldecyl-1-Ammonium Bromide as Organogelator & Room temperature Shape Memory Programming of Stearic Acid/ Natural Rubber Bilayer Blend. 2017. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1500563824207268.

    MLA Style (8th edition)

  • Chen, Xiaocheng. "Synthesis of 10-Carboxy-N-Decyol-N, N’- Dimethyldecyl-1-Ammonium Bromide as Organogelator & Room temperature Shape Memory Programming of Stearic Acid/ Natural Rubber Bilayer Blend." Master's thesis, University of Akron, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1500563824207268

    Chicago Manual of Style (17th edition)

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