Page 123 - 精细化工2019年第10期

第 36 卷第 10 期 精 细 化 工 Vol.36, No.10
2019 年 10 月 FINE CHEMICALS Oct. 2019

医药与日化原料
木质素/TiO 复合纳米颗粒的制备及其防晒应用
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余 爵 ，王显华 ，余佩敏 ，邱学青 1,2 ，杨东杰 ，钱 勇 1,2*
（1. 华南理工大学 化学与化工学院，广东 广州 510640；2. 华南理工大学 制浆造纸工程国家重点实验
室，广东 广州 510640）
摘要：采用一步水热酯化反应将不同来源的木质素紧密包覆在二氧化钛表面，得到木质素改性二氧化钛复合纳
米颗粒。DLS 分析显示经木质素包覆改性后，二氧化钛粒径增大 8~12 nm；TG 分析测得复合纳米颗粒中木质素
包覆量（质量分数）为 7.6%~9.0%；TEM 及 XPS 测试结果证实：木质素的羧基与二氧化钛表面羟基之间发生了
酯化反应，从而使木质素紧密包覆在二氧化钛表面。在此基础上，将木质素改性二氧化钛复合纳米颗粒作为唯
一防晒组分制备了防晒霜，测定了防晒指数 SPF 值并与只含二氧化钛的防晒霜进行了性能对比。结果显示：添
加质量分数为 10%和 20%的溶剂型木质素改性二氧化钛后防晒霜的 SPF 值分别为 43.88 和 72.83，明显高于添加
二氧化钛的防晒霜，且肤感更优，达到日常防晒的要求。在此基础上探讨了木质素改性强化二氧化钛紫外防护
性能的机理。
关键词：天然高分子；木质素；二氧化钛；复合纳米颗粒；防晒护肤；日用化学品
中图分类号：TQ658.2+4 文献标识码：A
文章编号：1003-5214 (2019) 10-2089-07 开放科学 (资源服务) 标识码 (OSID)：

Preparation of Lignin/TiO 2 Nano Composites and
Their Application in Sun Protection

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YU Jue , WANG Xian-hua , YU Pei-min , QIU Xue-qing ,
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YANG Dong-jie , QIAN Yong 1,2*
（1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640,
Guangdong, China; 2. State Key Laboratory of Pulp and Paper Engineering, Guangzhou 510640, Guangdong, China）
Abstract: Lignin from different technical sources were coated on the surface of titanium dioxide (TiO 2) via
one-step hydrothermal esterification reaction and nanoscale lignin/TiO 2 composites were obtained. The
results of DLS analysis showed that the particle size of TiO 2 increased by 8~12 nm after modification. The
mass fraction of lignin in the composites was 7.6%~9.0% by TG analysis. The esterification reaction that
happened between the carboxyl groups of lignin and the hydroxyl groups on the surface of TiO 2 was
confirmed by XPS, and coated lignin could be observed by TEM. The lignin/composite nano composites
were then used as the sole sunscreen component to prepare sun creams, and the sun protection factor (SPF)
values of the sun cream was measured and compared with that of the sun cream containing same amount of
TiO 2 only. The results showed that TiO 2 modified by organosolv lignin (OL) had the best sunscreen
performance and the SPF values of sun creams containing mass fraction of 10% and 20% of OL/TiO 2
reached to 43.88 and 72.83, respectively, which were much higher than that containing raw TiO 2. In
addition, the prepared sun creams had better feeling, which met the daily sun protection requirement.
Finally, the UV-blocking enhancement mechanism of lignin/TiO 2 was proposed.
Key words: natural polymer; lignin; titanium dioxide; nano composites; skincare; cosmetic materials

收稿日期：2019-02-20; 定用日期：2019-04-11; DOI: 10.13550/j.jxhg.20190139
基金项目：国家自然科学基金（21878113, 21606089, 21436004）；中央高校基本科研业务费（2018JQ05）；广州市珠江科技新星项目
（201806010139）
作者简介： 余 爵（1993—），男，硕士生，E-mail：yujue1993@126.com。联系人：钱 勇（1986—），男，研究员，E-mail：ceyqian@
scut.edu.cn。