Surface modification of wollastonite by the mechano-activated method and its properties |
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Authors: | Hao Ding Shou-ci Lu Gao-xiang Du |
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Institution: | (1) Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering and Department of Physics, University of North Texas, 1150 Union Circle # 305310, Denton, TX 76203-5017, USA;(2) Scientific Research and Production Enterprise of Materials Science, 17 Charents Street, 0025 Yerevan, Armenia |
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Abstract: | Surface modification of wollastonite particles using titanate as a modification agent incorporated by simultaneous wet ultra-fine
grinding in a laboratory stirred mill was investigated. The physical, physic-chemical and application properties of the modified
wollastonite were measured and evaluated. The results showed that grinding intensity markedly influences the modification
effect because of the mechano chemical effect. The hydrophilic surface of wollastonite was turned into a hydrophobic one after
modification. The interaction between titanate and wollastonite under wet grinding circumstances was studied. It was suggested
that physical adsorption and chemical adsorption of titanate coexisted on the wollastonite surface. The mechanical properties
of polyethylene (PE) filled with the modified wollastonite powder were markedly improved. |
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