Preparation method of hydrophilic polyving akohol nanometer microsphere resisting biological contamination

Abstract

The invention discloses a preparation method of hydrophilic polyving akohol nanometer microsphere resisting biological contamination, belonging to the technical field of environmental contamination control engineering. The invention is characterized by adopting a reverse micro-emulsion polymerization method and utilizes aldolization to carry out crosslinking on the nanometer microspheres. An internal aqueous phase is polyving akohol aqueous solution, oil phase is liquid paraffin, and emulsifier is compounded by Span 80 and OP-10. In the preparation process, the aqueous phase is added into external oil phase to form transparent and homogeneous microemulsion; then, cross-linking agent is added into the microemulsion; finally, the mixture is put into a water bath kettle at the temperature of 50 DEG C to react for 3 hours; after the reaction ends, ethanol is destabilized and centrifugalized, is washed by isopropanol, absolute ethyl alcohol and water, and is dried in vacuum. The invention has the effect and benefit that nanometer microspheres with different grain diameters are prepared by changing emulsifier content and theoretical degree of cross linking so as to satisfy different requirements. The surface of the microsphere has a great quantity of hydroxide radical, so that the microsphere has higher hydrophily and electronegativity; when applied in environmental fields, the microsphere has strong biological contamination resisting capability.

Description

technical field

[0001] The invention belongs to the technical field of environmental pollution control engineering and relates to a method for preparing polyvinyl alcohol nano-microspheres which are hydrophilic and anti-biological pollution. Background technique

[0002] With the development of social economy and the growth of population, the shortage of water resources has become a global problem, and the situation of water shortage in our country is even more severe. Due to the increasingly serious water pollution, the water environment is undergoing "qualitative" changes, which has brought many adverse effects to human production and life. About 500 billion tons of sewage are discharged on the earth every year, 90% of which have not been treated. Water pollution is most serious in developing countries.

[0003] In recent years, a variety of new and efficient sewage treatment technologies have emerged, among which membrane bioreactor (Membrane Bioreactor, MBR) is an emer...