Enhanced Glassy State Mechanical Properties of Polymer Nanocomposites via Supramolecular Interactions

Hashemi, Amir; Jouault, Nicolas; Williams, Gerhild Scholz; Zhao, Dan; Cheng, Kuo-Hsing; Kysar, Jeffrey W.; Guan, Zhibin; Kumar, Sanat K.

doi:10.1021/acs.nanolett.5b01859

Cited by 57 publications

(62 citation statements)

References 38 publications

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“…The strains at break of PP/PGS nanocomposites decrease compared with that of neat PP and the values for PP/PGS‐8 K and PP/PGS‐30 K nanocomposites are lower than that of PP/PGS‐2 K nanocomposites. Fracture is governed by imperfections (cracks, notches and extrinsic heterogeneities) that concentrate stress and strains . Recall the fracture surface at notch root of PP/PGS‐8 K and PP/PGS‐30 K nanocomposites in Figure (c,e), the size of aggregates range from hundreds of nanometers to a few micrometers.…”

Section: Resultsmentioning

confidence: 99%

Interfacial influence on mechanical properties of polypropylene/polypropylene‐grafted silica nanocomposites

Wang

2017

J of Applied Polymer Sci

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Three types of polypropylene‐grafted silica (PGS‐2 K, PGS‐8 K and PGS‐30 K) with different grafting chain lengths were prepared. After melt‐blending PGS with polypropylene (PP), we studied the PP/PGS interface properties and the influence of PP/PGS interfaces on mechanical properties of nanocomposites. The strong matrix/particle interface was observed in PP/PGS‐30 K nanocomposites with 5 wt % particle loading as evidenced by 2.5 °C increased glass transition temperature (Tg) compared with neat PP, whereas the weak matrix/particle interface was observed in PP/PGS‐2 K nanocomposites with decreased Tg. The variations in the matrix/particle interfacial strength lead to a transition in the yield stress of nanocomposites. Compared with the unfilled PP, the yield stress of the PP/PGS‐2 K nanocomposites is decreased by 0.7 MPa, and the yield stress of the PP/PGS‐30 K nanocomposites is enhanced by 1.4 MPa. In addition, benefiting from good dispersion, the PP/PGS‐masterbatch nanocomposites with a strong matrix/particle interface not only exhibit increased Young's modulus and yield stress, but also the strain at break remains in line with the unfilled PP, which is in contrast to the conventional wisdom that the gain in modulus and strength must be at the expense of the decreased break strain. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45887.

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Section: Resultsmentioning

confidence: 99%

Interfacial influence on mechanical properties of polypropylene/polypropylene‐grafted silica nanocomposites

Wang

2017

J of Applied Polymer Sci

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“…Stability of nanocomposites‐based nanomedicines could be improved by enhancing the interaction (e.g., van der Waals force, coordination, electrostatic interaction, as well as hydrogen and covalent bonding) between components using ligands or compatibilizers to prevent early detachment of nanomaterial units . For example, using “loading” method, we have designed the upconversion luminescent graphene‐based nanocomposite film with nacre‐like structures for optical pH sensing .…”

Section: Safe‐by‐design Strategies For Nanomedicinementioning

confidence: 99%

A Safe‐by‐Design Strategy towards Safer Nanomaterials in Nanomedicines

et al. 2019

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.201805391.The marriage of nanotechnology and medicine offers new opportunities to fight against human diseases. Benefiting from their unique optical, thermal, magnetic, or redox properties, a wide range of nanomaterials have shown potential in applications such as diagnosis, drug delivery, or tissue repair and regeneration. Despite the considerable success achieved over the past decades, the newly emerging nanomedicines still suffer from an incomplete understanding of their safety risks, and of the relationships between their physicochemical characteristics and safety profiles. Herein, the most important categories of nanomaterials with clinical potential and their toxicological mechanisms are summarized, and then, based on this available information, an overview of the principles in developing safe-by-design nanomaterials for medical applications and of the recent progress in this field is provided. These principles may serve as a starting point to guide the development of more effective safe-by-design strategies and to help identify the major knowledge and skill gaps.

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“…The high mechanical strength of PAES-COOH originated from its rigid chain structure and π-π* interaction among adjacent chains. The introduction of PVPON improved the mechanical strength of the entire PAES-COOH/PVPON x% (x = 2, 4, 6, 8, 10, 16,27) composites. As shown in Figure 2a, Supporting Information Figure S4a, and summarized in Table 1, the PAES-COOH/PVPON 10% composites exhibited the highest mechanical strength, with a tensile strength of ∼104.8 MPa, Young's modulus of ∼932.2 MPa, and a strain at break of ∼16.2%.…”

Section: Mechanical Properties and Thermal Stabilities Of The Compositesmentioning

confidence: 99%

“…4,7,10,[11][12][13] Meanwhile, superstrong thermoplastic polymers are usually difficult to dissolve in proper solvents and to process. 3,5,14,15 A conventional and widely employed strategy for reinforcement of thermoplastic polymers is homogeneously dispersing stiff nanofillers, such as silica, 9,16 clays, 10,17,18 carbon nanotubes, [19][20][21] graphene oxides, 20,[22][23][24] cellulose nanocrystals, 25,26 metal nanoparticles, 27,28 and other nanofillers 3,[29][30][31] within them. Uniform nanofiller dispersion and strong interfacial interactions between nanofillers and polymer matrices are the most crucial factors that enhance the mechanical strength of the resulting polymer composites.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to achieve an effectively enhanced mechanical strength, surface modification of nanofillers and well-designed procedures for the incorporation of the nanofillers are required to improve their interfacial interactions with the targeted polymer matrices and to promote their uniform dispersion. 16,21,22,30,32,34 Studies have shown that if the mechanical strength of thermoplastic polymers could be enhanced by mixing them with other types of polymers, the fabrication and processing of the mechanically superstrong polymer composites would be largely simplified. Besides appropriate strategies that could significantly enhance the mechanical strength of the thermoplastic polymers using polymers as nanofillers are highly desirable.…”

Section: Introductionmentioning

confidence: 99%

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Polymeric Complex Nanoparticles Enable the Fabrication of Mechanically Superstrong and Recyclable Poly(aryl ether sulfone)-based Polymer Composites

Luo

et al. 2020

CCS Chem.

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It is a long-term pursuit, and also, a challenge to significantly improve the mechanical strength of thermoplastic polymers using readily dispersed polymers as nanofillers. In this study, we demonstrated that in situ formed carboxylic acid-functionalized poly(aryl ether sulfone) (PAES-COOH)/polyvinylpyrrolidone (PVPON) complex nanoparticles can significantly enhance the mechanical strength of PAES-COOH by mixing PAES-COOH with a small fraction of PVPON. The PAES-COOH/PVPON 10% composite, which contained ∼10 wt % PVPON, exhibited a tensile strength of ∼104.8 MPa and Young's modulus of ∼932.2 MPa, which were ∼2.0 and ∼1.7 times higher than those of the PAES-COOH, respectively. The PAES-COOH/PVPON nanoparticles which were uniformly dispersed in PAES-COOH matrices and had strong hydrogen-bonding interactions with PAES-COOH, served as nanofillers to reinforce the mechanical strength of the PAES-COOH. The PAES-COOH/PVPON 10% composites possessed excellent solvent-assisted healability, and the fractured composites could be healed to restore their original mechanical strength. Meanwhile, the PAES-COOH/PVPON 10% composites could be recycled multiple times, and yet retained their shape integration and their original mechanical strength.

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Enhanced Glassy State Mechanical Properties of Polymer Nanocomposites via Supramolecular Interactions

Cited by 57 publications

References 38 publications

Interfacial influence on mechanical properties of polypropylene/polypropylene‐grafted silica nanocomposites

Interfacial influence on mechanical properties of polypropylene/polypropylene‐grafted silica nanocomposites

A Safe‐by‐Design Strategy towards Safer Nanomaterials in Nanomedicines

Polymeric Complex Nanoparticles Enable the Fabrication of Mechanically Superstrong and Recyclable Poly(aryl ether sulfone)-based Polymer Composites

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