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摘要
以亚甲基二苯并三唑四甲基丁基苯酚(MBBT)和TiO2为原料,聚丙烯酸钠为分散剂,制备一种具有全波段紫外屏蔽性能的水性分散浆。采用液体紫外、Zeta电位、粒径测试和流变测试等对分散浆进行表征,结果表明,在MBBT和TiO2的质量比为2∶1,聚丙烯酸钠的用量在8%(wt,质量分数)时,纳米TiO2颗粒对MBBT有较好的助磨效果,减小了MBBT的粒径,所得浆体的分散性和稳定性最好。分散浆具有剪切稀化特征及假塑性,流动曲线符合幂律模型;分散浆的黏度随温度的升高而降低,低固含量的浆体对温度更为敏感。将浆体以10%的活性组分配成模拟防晒霜,测得防晒指数(SPF)为20,与粉体机械混合配成的模拟防晒霜(SPF=11)相比,湿磨法大大提升了紫外屏蔽能力。
Abstract
Using methylene dibenzotriazole tetramethylbutylphenol (MBBT) and titanium dioxide (TiO2) as raw materials and sodium polyacrylate as dispersant,aqueous dispersion slurry with full-band UV shielding performance was prepared.The slurry was characterized by liquid ultraviolet,Zeta potential,particle size test and rheological test.The results showed that when the ratio of MBBT and TiO2 was 2∶1,and the amount of sodium polyacrylate was 8%,the nano-TiO2 particles had better aid grinding effect on MBBT.It reduced the particle size of MBBT,and the obtained slurry had the best dispersion and stability.The slurry had the characteristics of shear thinning and pseudoplasticity,and the flow curve conformed to the power law model.The slurry viscosity decreased with the increase of temperature,and the slurry with low solid content was more sensitive to temperature.The slurry was divided into a simulated sunscreen with 10% active component,and the sun protection factor (SPF) was measured to be 20.Compared with the simulated sunscreen (SPF=11) made by mechanical mixing of powder,the wet grinding method greatly improved the UV shielding ability.
关键词
亚甲基二苯并三唑四甲基丁基苯酚
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二氧化钛
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分散浆
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流变
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紫外屏蔽
Key words
MBBT
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TiO2
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dispersed slurry
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rheology
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UV shielding
水基MBBT-TiO2分散浆的制备及其流变性能研究[J].
化工新型材料, 2022, 50(3): 163-167 DOI:10.19817/j.cnki.issn1006-3536.2022.03.033
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基金资助
江苏省研究生科研与实践创新计划项目(SJCX20-0969);淮安市自然科学研究计划(HAB201952)
