Dissipative particle dynamics studies on the interfacial tension of A/B homopolymer blends and the effect of Janus nanorods

Zhou, Chun; Luo, Siwei; Yi, Sun; Zhou, Yang; Qian, Wen

doi:10.1002/app.44098

Cited by 15 publications

(16 citation statements)

References 39 publications

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“…JNPs have been mixed with binary mixtures such as homopolymer blends, to find that domain growth is slowed by the segregation of JNP to the interface between domains [17][18][19] . Similar results have been found using Dissipative Particle Dynamics (DPD) 20,21 while the interfacial tension in the presence of Janus colloids was studied by C. Zhou et al 22 .…”

Section: Introductionsupporting

confidence: 82%

Co-assembly of Janus nanoparticles in block copolymer systems

et al. 2019

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Block copolymer are ideal matrices to control the localisation of colloids. Furthermore, anisotropic nanoparticles such as Janus nanoparticles possess an additional orientational degree of freedom that can play a crucial role in the formation of highly ordered materials made of block copolymers. This work presents a mesoscopic simulation method to assert the co-assembly of Janus nanoparticles in a block copolymer mixture, finding numerous instances of aggregation and formation of ordered configurations which can be related to dispersions of pure Janus colloids. Comparison with chemically homogeneous neutral nanoparticles determines that Janus nanoparticles are less prone to induce bridging along lamellar domains, thus being a less destructive way to segregate nanoparticles at interfaces. The combination of asymmetric block copolymer and asymmetric Janus nanoparticles can result in assembly of colloids in an even number of layers within one of the block domains.

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Section: Introductionsupporting

confidence: 82%

Co-assembly of Janus nanoparticles in block copolymer systems

et al. 2019

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“…It reaches from 0 (compatibilizer does not reduce the interfacial tension) to −1 (compatibilizer removes the interfacial tension completely). Block copolymers, ,− random copolymers, − comb/brush copolymers, − Janus nanorods, − and copolymer-grafted nanoparticles − have been investigated as compatibilizers in recent years.…”

Section: Introductionmentioning

confidence: 99%

Compatibilization Efficiency of Additives in Homopolymer Blends: A Dissipative Particle Dynamics Study

Zhou

Schneider

et al. 2021

Macromolecules

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We study the compatibilizing effect of copolymers of different architectures on the interface between two incompatible polymer phases by dissipative particle dynamics. Three base polymer systems are investigated, namely weakly incompatible (interspecies repulsion parameter of the dissipative particle dynamics interaction α AB : 25 < α AB < 30), intermediate-incompatible (30 ≤ α AB < 40), and strongly incompatible systems (α AB ≥ 40). We find that the compatibilization efficiency of all regular block copolymers in strongly incompatible systems can be predicted by a power-law function, which contains the Flory−Huggins interaction parameter, the areal concentration, and the mean block length of the compatibilizer. Regular multiblock copolymers have better compatibilization performance compared to the symmetric diblock copolymers at the same areal concentration. This is because smaller amounts of the multiblock copolymer are required to saturate a given interfacial area. For unsymmetric diblock copolymers in strongly incompatible systems, we find additionally that the length of the shortest block is a more important determinant for the compatibilization efficiency than the ratio of block lengths. Our work reveals the involved mechanisms of the compatibilization process, and it provides a promising route to predict the compatibilization efficiency of differently structured copolymer additives in the respective polymer blends.

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“…In recent years, dissipative particle dynamics (DPD) simulations have been successfully used to study the interfacial and structural properties of immiscible mixtures. [28][29][30][31][32][33][34][35][36][37][38][39] Specically, Qian et al 28 calculated the interfacial tension of homopolymer/diblock copolymer/homopolymer mixtures via DPD simulation, and the results show that, as the number of the AB copolymer is xed, the interfacial tension decreases with the increase of chain length of AB copolymer. Guo et al 29 systematically investigated the segregation of block copolymers in binary immiscible homopolymer blends through DPD simulations.…”

Section: Introductionmentioning

confidence: 99%