Lignin Reverse Micelles for UV-Absorbing and High Mechanical Performance Thermoplastics

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• 作者：Yong Qian ; Xueqing Qiu ; Xiaowen Zhong ; Delang Zhang ; Yonghong Deng ; Dongjie Yang ; Shiping Zhu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：December 9, 2015
• 年：2015
• 卷：54
• 期：48
• 页码：12025-12030
• 全文大小：385K
• ISSN：1520-5045

文摘

This work reports the preparation of a novel class of lignin reverse micelles (LRM) and their application as a UV-blocking additive for thermoplastics. It is found that when 7 vol % cyclohexane was added into alkali lignin (AL)/dioxane solution, LRM formed. When the cyclohexane amount increased, LRM tended to aggregate and separate from the solutions. LRM films had a water contact angle higher than 80掳, in comparison to only 52掳 of the AL film control sample. Due to hydrophobicity, the miscibility of LRM with high density polyethylene (HDPE) was significantly improved from that of AL with HDPE. Since LRM retained the phenolic hydroxyl structure of AL, the HDPE/LRM samples showed an excellent UV-absorbing performance. Furthermore, the added LRM had little negative influence, but significantly improved the HDPE mechanical properties. With 5 wt % LRM loading, Young鈥檚 modulus increased from 1066 to 2104 MPa and the elongation at break increased from 671% to 1030%, respectively.