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Preparation of Nano TiO2 Composite Fluorescent Whitening Emulsion and Its Application in the Paper |
Received:January 18, 2021 |
DOI:10.11980/j.issn.0254-508X.2021.07.003 |
Key Words:high yield pulp triazine amino stilbene fluorescent whitening agent nano TiO2 whiteness yellowing inhibition |
Fund Project:国家自然科学基金项目(31670596);陕西省轻化工助剂重点实验室开放基金(13SJ019)。 |
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Abstract:A triazine amino stilbene fluorescent whitening monomer (FBs) was prepared by using 4,4-diamino-2,2-disulfonic acid stilbene (DSD acid) as the parent and cyanuric trichloride as the bridging agent. FBs, acrylamide, styrene and modified nano TiO2 were copolymerized to obtain nano TiO2 composite fluorescent whitening emulsion (FBs-TiO2), which was used for paper surface coating. The results showed that FBs-TiO2 was successfully prepared and had better stability. The whiteness increased from 67.2% to 87.2%, the tensile strength was enhanced from 3.12 kN/m to 4.87 kN/m, the tearing strength was increased from 13.8 mN·m2/g to 17.4 mN·m2/g after FBs-TiO2 was coated on paper surface, the PC value decreased from 10.40 to 6.66 after 48 hours of UV aging. It was indicated that the FBs-TiO2 not only improved the whiteness of paper and inhibit the yellowing of paper, but also significantly enhanced the surface strength and mechanical properties of paper. It was a papermaking additive with positive performance. |
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