Interfacial Engineering with Rigid Nanoplatelets in Immiscible Polymer Blends: Interface Strengthening and Interfacial Curvature Controlling,ACS Applied Materials & Interfaces

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Interfacial Engineering with Rigid Nanoplatelets in Immiscible Polymer Blends: Interface Strengthening and Interfacial Curvature Controlling
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-02-16 , DOI: 10.1021/acsami.1c24817
Lingmin Hu ₁ , Yuanyuan Han ₂ , Chenyan Rong ₁ , Xiaokan Wang ₁ , Hengti Wang ₁ , Yongjin Li ₁

Affiliation

The interfacial nanoparticle compatibilization (INC) strategy has opened up a promising avenue toward simultaneous functionalization and interfacial engineering of immiscible polymer blends. While the INC mechanism has been well developed recently, few investigations have focused on rigid nanoplatelets because of the inherent steric hindrance of the surface-grafted polymer chains. Herein, surface-modified rigid nanoplatelets have been incorporated into an immiscible poly(l-lactide) (PLLA)/poly(butylene succinate) (PBSU) blend. It is demonstrated that the strong interfacial adhesion between PLLA and PBSU phases is promoted via molecular entanglements of the grafted chains on the surface of nanoplatelets with the individual components. A refined phase morphology with improved mechanical properties can be achieved with the addition of 5 wt % modified Gibbsite nanoplatelets. It was further found that the stiffness of nanoplatelets can change the geometry of the interface significantly. It is, therefore, indicated that the simultaneous interface strengthening and interfacial curvature controlling of rigid nanoplatelets originate from the selective swelling/collapse of the in situ-formed PLLA and PBSU grafts within the corresponding phase at the interface. Such a mechanism is confirmed by the Monte Carlo simulations. This work provides new opportunities for the fabrication of advanced polymer blend nanocomposites.

中文翻译：

不混溶聚合物共混物中刚性纳米片的界面工程：界面强化和界面曲率控制

界面纳米颗粒增容（INC）策略为不混溶聚合物共混物的同时功能化和界面工程开辟了一条有希望的途径。虽然 INC 机制最近得到了很好的发展，但由于表面接枝聚合物链的固有空间位阻，很少有研究集中在刚性纳米片上。在此，表面改性的刚性纳米片已被整合到一种不混溶的聚（l-丙交酯）（PLLA）/聚（丁二酸丁二醇酯）（PBSU）混合物。结果表明，PLLA 和 PBSU 相之间的强界面粘附是通过纳米片表面上的接枝链与各个组分的分子缠结来促进的。通过添加 5 wt% 的改性三水铝石纳米片可以实现具有改进的机械性能的细化相形态。进一步发现，纳米片的刚度可以显着改变界面的几何形状。因此，表明刚性纳米片的同时界面强化和界面曲率控制源于原位的选择性溶胀/塌陷-在界面处的相应相内形成 PLLA 和 PBSU 移植物。蒙特卡罗模拟证实了这种机制。这项工作为制造先进的聚合物共混纳米复合材料提供了新的机会。

更新日期：2022-02-16

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