| In this thesis,an amphiphilic graft copolymer was prepared by the ring-opening polymerization method with hydrophilic nanocellulose crystals as the main chain and hydrophobic polylactic acid as the side chain.It has self-assembly into micelles in water.Ability.Through single factor experiments,the influence of reaction time,reaction temperature and raw material reaction ratio on the degree of substitution and polymerization trend of the copolymer was explored.The best reaction conditions are when the reaction time is 12 h,the reaction temperature is 120?,and the ratio of nanocellulose to L-lactide is 1:5,and the degree of substitution is the highest at this time.The prepared amphiphilic graft copolymer has a critical micelle concentration of0.33 mg/m L,which is spherical in water and has an obvious shell-core structure,thereby preparing microcapsules containing agarwood essential oil.The self-assembly morphology of micelles was studied by changing the concentration,p H,ionic strength and temperature of the copolymer in water.Finally,the product is applied to the wallpaper to obtain the aromatic wallpaper,and the Korsmeyer-Peppas model is used to explore the influence of temperature on the release of the main aroma components of the agarwood essential oil on the aromatic wallpaper.The results show that the prepared NCC-g-PLA copolymer micelles have good stability.When the ionic strength of the polymer micelle solution is too high and alkaline,agglomeration and sedimentation will occur.When the polymer concentration in water is too high,it will self-assemble into worm-like micelles with higher viscosity.In the application of products,the aroma release of aromatic wallpaper increases with the increase of temperature.These conclusions provide a new wall material for volatile essential oil products,and provide a good theoretical and experimental basis for the preparation and application of cellulose-based amphiphilic copolymer micelles. |
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