| In this paper,three kinds of Nano-particles were prepared from different kinds of wall materials,namely chitosan,methyl methacrylate and β-Cyclodextrin.The average particle size was about 200 nm ± 25 nm.The Nano particles were effectively adsorbed on the surface of paper fiber by spraying.By combining experimental characterization with adsorption kinetics,the scientific problems such as the type of force,the site of action and the adsorption behavior of nanoparticle on the surface of paper fiber without cross-linking agent were explored.The mechanism of the interaction between nanoparticle and paper fiber is discussed.The details are as follows:1.The surface morphology,molecular structure,thermodynamic properties and chemical structure of the nanoparticle before and after adsorption were analyzed by means of X-ray photoelectron spectroscopy,scanning electron microscopy,infrared spectroscopy,X-ray diffraction,thermos-gravimetry and differential thermo-gravimetry.The results show that Nano particles are mainly driven by intermolecular hydrogen bond,electrostatic and hydrophobic interaction on the surface of paper fiber,and the interaction strength gradually increases with the increase of Nano particle concentration,and the crystallinity index of paper fiber decreases,and preferentially adheres to the hydrophobic surface of paper fiber.2.Adsorption kinetic model fitting method was used to study the adsorption rate and adsorption behavior of micro-nanoscale sustained-release fragrance on the surface of paper fiber.The results showed that: through the analysis of the adsorption rate curve,it was found that the adsorption process can be divided into three stages: rapid adsorption,slow adsorption,and gradually reach the equilibrium.The adsorption of the three nanoscale sustained-release essence on the fiber surface at adsorption equilibrium not only conforms to the quasi-secondorder kinetic adsorption model,but also follows the Langmuir isothermal adsorption. |
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