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High-Performance Polylactic Acid Materials Enabled by TiO2–Polydopamine Hybrid Nanoparticles
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-03-03 , DOI: 10.1021/acs.iecr.0c06238
Zheng Zhang 1 , Yang Wang 1 , Ting Li 1 , Piming Ma 1 , Xuhui Zhang 1 , Bihua Xia 1 , Mingqing Chen 1 , Mingliang Du 1 , Weifu Dong 1
Affiliation  

Poor ultraviolet (UV) stability of polylactic acid (PLA) partially restricts its applications under atmospheric conditions. Titanium dioxide (TiO2) is a common and widely used UV-shielding agent, but detrimental effects often exists on the properties of polymers. In this study, we used polydopamine (PDA) to construct TiO2–PDA hybrid nanoparticles. The introduction of PDA can greatly reduce oxygen vacancies in TiO2, so as to better maintain the stability of the polymer matrix. TiO2–PDA hybrid nanoparticles were synthesized through simple steps and composited with PLA to prepare PLA/TiO2–PDA nanocomposites (noted as PLA/TP). The established PLA/TP films show excellent UV-shielding performance without sacrificing transparency (the transmittance at 550 nm is 85.7%). What’s more, with 0.2 wt % nanoparticles added, the nanocomposite films have a good combination of strength and toughness. The performance improvement of PLA will broaden its application fields, making environmental materials have a wider range of uses and longer service life.

中文翻译:

TiO 2-聚多巴胺杂化纳米颗粒的高性能聚乳酸材料

聚乳酸(PLA)的紫外线(UV)稳定性差,部分限制了其在大气条件下的应用。二氧化钛(TiO 2)是一种常用且广泛使用的紫外线防护剂,但是通常会对聚合物的性能产生不利影响。在这项研究中,我们使用聚多巴胺(PDA)构造了TiO 2 -PDA杂化纳米颗粒。PDA的引入可以大大降低TiO 2中的氧空位,从而更好地保持聚合物基体的稳定性。通过简单的步骤合成了TiO 2 -PDA杂化纳米颗粒,并与PLA复合制备了PLA / TiO 2–PDA纳米复合材料(记为PLA / TP)。既定的PLA / TP膜在不牺牲透明度的情况下表现出出色的紫外线屏蔽性能(550 nm的透射率为85.7%)。而且,通过添加0.2wt%的纳米颗粒,纳米复合膜具有强度和韧性的良好组合。PLA的性能提升将拓宽其应用领域,使环保材料具有更广泛的用途和更长的使用寿命。
更新日期:2021-03-17
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