Synthesis Optimization of Quaternized Chitosan and its Action as Reducing and Stabilizing Agent for Gold Nanoparticles |
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| Authors: | Yunzhi Ling Yuqiong Luo Jiwen Luo Xiaoying Wang Runcang Sun |
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| Institution: | 1. State Key Laboratory of Pulp &2. Paper Engineering , South China University of Technology , Guangzhou , 510640 , China;3. Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, School of Chemistry and Environment , South China Normal University , Guangzhou , 510006 , China;4. Paper Engineering , South China University of Technology , Guangzhou , 510640 , China;5. Institute of Biomass Chemistry and Technology, Beijing Forestry University , Beijing , 100083 , China |
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| Abstract: | The optimal conditions for synthesizing quaternized chitosan (QCS) via microwave irradiation were explored. The microwave temperature, time, power, mole ratio between chitosan and 2,3-epoxypropyltrimethyl ammonium chloride (ETA), volume ratio between isopropanol and water, and pH value of the reaction system were studied to evaluate the effect on the degree of substitution (DS). The structure of QCS was characterized by means of FT-IR, NMR, XPS and XRD. TGA and DTG were used to measure its thermal stability. At last, QCS acted as a reducing and stabilizing agent to greenly synthesize gold nanoparticles without adding any other chemical reagent. |
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| Keywords: | Quaternized chitosan microwave irradiation degree of substitution gold nanoparticles |
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