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| 纳米TiO2复合荧光增白剂的制备及其在纸张中的应用 |
| Preparation of Nano TiO2 Composite Fluorescent Whitening Emulsion and Its Application in the Paper |
| 收稿日期：2021-01-18 |
| DOI：10.11980/j.issn.0254-508X.2021.07.003 |
| 关键词: 高得率浆 三嗪氨基二苯乙烯型荧光增白剂 纳米TiO2 白度 返黄抑制 |
| Key Words:high yield pulp triazine amino stilbene fluorescent whitening agent nano TiO2 whiteness yellowing inhibition |
| 基金项目: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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| 摘要:以4,4-二氨基-2,2-二磺酸二苯乙烯（DSD酸）为母体，三聚氯氰为桥联剂，制备了三嗪氨基二苯乙烯型荧光增白单体（FBs）；再将FBs、丙烯酰胺、苯乙烯与改性纳米TiO2共聚，制得纳米TiO2复合荧光增白剂（FBs-TiO2），并将其用于纸张表面涂布。结果表明，FBs-TiO2成功制备，且稳定性更好；FBs-TiO2涂布后，纸张白度由67.2%提高到87.2%，抗张强度由3.12 kN/m提高到4.87 kN/m，撕裂指数由13.8 mN·m2/g提高到17.4 mN·m2/g，并且紫外光老化48 h后，返黄值由10.40下降到6.66。说明FBs-TiO2不但能提高纸张白度、抑制纸张返黄，还能有效增强纸张的表面强度和力学性能，是一种性能优异的造纸助剂。 |
| 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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