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Xiao-lan Tong, Yao-bang Li, Ya-ning He, Xiao-gong Wang. A SURFACTANT-ASSISTED APPROACH FOR PREPARING COLLOIDAL AZO POLYMER SPHERES WITH NARROW SIZE DISTRIBUTION[J]. Chinese Journal of Polymer Science,
;2006, 24(4): 431-436.
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Asurfactant-assistedmethodforpreparingcolloidalsphereswithnarrowsizedistributionfromapolydispersedazopolymerhasbeendevelopedinthiswork.ThecolloidalsphereswereformedthroughgradualhydrophobicaggregationofthepolymericchainsinTHF-H2Odispersionmedia,whichwasinducedbyasteadyincreaseinthewatercontent.Resultsshowedthattheadditionofasmallamountofsurfactant(SDBS)couldsignificantlynarrowthesizedistributionofthecolloidalspheres.Thesizedistributionofthecolloidalsphereswasdeterminedbytheconcentrationsofazopolymerandtheamountofsurfactantinthesystems.Whentheconcentrationsofpolymerandsurfactantamountwereinaproperrange,colloidalsphereswithnarrowsizedistributioncouldbeobtained.ThecolloidalspheresformedbythismethodcouldbeelongatedalongthepolarizationdirectionofthelaserbeamsuponAr+laserirradiation.Thecolloidalspheresareconsideredtobeanewtypeofthecolloid-basedfunctionalmaterials.
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