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Study of PLA/PMMA/SiO2 Degradable Hybrid Polymer Solid Electrolytes

Author: ShuLiPing
Tutor: WangHuaLin
School: Hefei University of Technology
Course: Applied Chemistry
Keywords: The polymer solid electrolyte PLA SiO2 Sol - gel Ionic Conductivity
CLC: O631.3
Type: Master's thesis
Year: 2010
Downloads: 73
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Abstract


Thesis inorganic / polymer composite electrolyte inorganic components reunion and end-of-life environmental pollution problems, based on the sol - gel method the preparation of biodegradable PLA/PMMA/SiO2 of hybrid polymer solid electrolyte , research electrolyte performance and degradation performance , and related structures of the products were characterized . Tetraethyl orthosilicate ( TEOS ) , polylactic acid ( PLA ) , methyl methacrylate (MMA) as raw materials , KH570 silane coupling agent , was prepared the heteroaryl PLA/PMMA/SiO2 material . Optimize the preparation conditions of PLA/PMMA/SiO2 hybrid materials and product performance testing and structural characterization by means of FT-IR, XPS, DSC, XRD test . Inorganic SiO2 PLA , MMA matrix to the Si - OC key binding , good compatibility ; material is an amorphous structure , this structure is conducive to the improvement of the solid electrolyte conductivity and degradation . In the the LiClO4 added to the PLA/PMMA/SiO2 substrate , preparing biodegradable PLA/PMMA/SiO2 hybrid polymer solid electrolyte . At room temperature, the conductivity of the solid electrolyte in 10-3 ~ 10-4S · cm-1 order of magnitude , and with the SiO2 or doped LiClO4 increase increases , but when the SiO2 content exceeds a certain value , ionic conductivity but decrease , when LiClO4 doping amount reaches a certain value , the growth trend of the ionic conductivity is not obvious. The stability results show that the test and ionic conductivity of the electrolyte of the electrochemical window of time , PLA/PMMA/SiO2 biodegradable solid polymer electrolyte to meet the application needs of the lithium-ion battery . Boric acid buffer solution ( pH = 8.9 ) and natural soil the landfill on the biodegradable PLA/PMMA/SiO2 hybrid polymer solid electrolyte degradation experiments , results show that the degradation of natural soil landfill is better than the solution degradation method .

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > The chemical nature of polymers
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