Preparation method of nano-SiO2/cellulose composite separating membranes
A technology of cellulose and separation membrane, which is applied in the direction of semipermeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of uneven dispersion of matrix materials, unsatisfactory modification effect, and high chemical reactivity, etc., to achieve The internal structure is evenly distributed, the effect of improving the strength and uniformity of the film, and improving the mechanical properties
Active Publication Date: 2013-06-26
OLANSI HEALTHCARE CO LTD
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The invention discloses a preparation method of nano-SiO2/cellulose composite separating membranes, which comprises the following steps: (1) dissolving cellulose in ionic liquid so as to form a membrane-casting solution; (2) preparing nano-SiO2; (3) carrying out modification on the nano-SiO2 by using a silane coupling agent gamma-(2, 3-epoxy propoxy) n-propyltrimethoxysilane; and (4) dispersing the modified nano-SiO2 in the membrane-casting solution obtained in sep (1) so as to obtain a mixed membrane-casting solution; and preparing the mixed membrane-casting solution into a membrane and drying the membrane so as to obtain a nano-SiO2/cellulose composite separating membrane. According to the invention, the dispersion and uniformity of nano-SiO2 particles in cellulose membranes are improved, and the mechanical strength and thermal stability of the cellulose membranes are further enhanced.
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