Silica-polyethersulfone core–shell nanoparticles as multifunctional filler for marine applications

Cheon, Ji-Won; Kim, Il-Jin; Kim, Jihoon; Jang, Jinho; Lee, Dong Hoon; Mun, So Youn; Park, Jun Woo; Lee, Jun Young; Yu, Seunggun

doi:10.1016/j.compositesa.2021.106721

Cited by 13 publications

(4 citation statements)

References 54 publications

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“…The basic principle for enhancing toughness of elastomers is to incorporate energy dissipation structures, such as introducing secondary polymer network, sacrificial bonds, or fillers. − In contrast, a common method to enhance an elastomeric thermal conductivity is to blend it with high thermally conductive fillers such as metal or ceramic particles. , However, the large number of fillers required to exceed the percolation threshold significantly deteriorate the toughness and the softness. Previous investigation has demonstrated that the interface between fillers and polymer matrix plays important role in the both the toughness and thermal conductivity of elastomers. , Covalent attachment of short molecules (silane coupling agents) and polymers to the filler surface provides an opportunity for functionalizing filler surfaces and tailoring the energetics of the polymer–filler interaction . However, strong stable chemical covalent interaction between polymer and filler cannot decouple the thermal conductivity and toughness.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Coordination Interaction Enables Soft Elastomer Composites High Thermal Conductivity and High Toughness

Wang

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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Soft elastomers have attracted wide applications, such as soft electronic devices and soft robotics, due to their ability to undergo large deformation with a small external force. Most elastomers suffer from poor toughness and thermal conductivity, which limits their use. The addition of inorganic fillers can enhance the thermal conductivity and toughness, but it deteriorates the softness (low Young's modulus and high stretchability). Integrating thermal conductivity, toughness, and softness into one elastomer is still a challenge. Here, we report a strategy of interfacial coordination interaction to achieve soft elastomer composites with high thermal conductivity and high toughness. We demonstrate the strategy by using poly(lipoic acid) elastomer and silver-coated aluminum filler as model, where silver−sulfur coordination cross-links are formed at the interface. The resultant elastomer composite shows high streachability (450%), high thermal conductivity (2.35 W m −1 K −1 ), low modulus (321 kPa), and high toughness (3496 J m −2 ), which cannot be achieve in existing elastomers. The time domain thermoreflectance technique demonstrates that the silver−sulfur coordination interaction lowers the interfacial thermal resistance, resulting in enhanced thermal conductivity of the elastomer composites. The excellent softness stems from lower bonding energy of the silver−sulfur coordination cross-links compared with covalent chemical cross-links. The high toughness also benefits from the interfacial silver−sulfur coordination interaction that can dissipate more energy upon deformation. We further demonstrate the potential application of the thermally conductive, tough, and soft elastomer composites for thermal management of chip and soft electronic devices.

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Section: Introductionmentioning

confidence: 99%

Interfacial Coordination Interaction Enables Soft Elastomer Composites High Thermal Conductivity and High Toughness

Wang

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

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“…[ 108 , 109 ] GPTMS and silica NPs covalently bind during the sol‐gel process, and the epoxy ring of the former was converted into a diol by the nucleophilic attack of alginate. [ 62 , 110 , 111 ] Shin et al. explained that PDRN plays a role in creating semi‐interpenetrating hydrogel networks, which enhance the mechanical properties of hydrogels, although its strength cannot compete with that of other strengthening fillers, such as graphene oxide and nanoclay.…”

Section: Resultsmentioning

confidence: 99%

“…[108,109] GPTMS and silica NPs covalently bind during the sol-gel process, and the epoxy ring of the former was converted into a diol by the nucleophilic attack of alginate. [62,110,111] Shin et al explained that PDRN plays a role in creating semi-interpenetrating hydrogel networks, which enhance the mechanical properties of hydrogels, although its strength cannot compete with that of other strengthening fillers, such as graphene oxide and nanoclay. [99] The well-distributed DNA observed in the current study exerted nanoscale reinforcement effects that were similar to those described by Shin et al [36] and enhanced the dispersion of stress from the polymer chains to the DNA.…”

Section: Physicochemical Characterization Of 3d-printed Hydrogel Dres...mentioning

confidence: 99%

3D‐Printed Functional Hydrogel by DNA‐Induced Biomineralization for Accelerated Diabetic Wound Healing

et al. 2023

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Chronic wounds in diabetic patients are challenging because their prolonged inflammation makes healing difficult, thus burdening patients, society, and health care systems. Customized dressing materials are needed to effectively treat such wounds that vary in shape and depth. The continuous development of 3D‐printing technology along with artificial intelligence has increased the precision, versatility, and compatibility of various materials, thus providing the considerable potential to meet the abovementioned needs. Herein, functional 3D‐printing inks comprising DNA from salmon sperm and DNA‐induced biosilica inspired by marine sponges, are developed for the machine learning‐based 3D‐printing of wound dressings. The DNA and biomineralized silica are incorporated into hydrogel inks in a fast, facile manner. The 3D‐printed wound dressing thus generates provided appropriate porosity, characterized by effective exudate and blood absorption at wound sites, and mechanical tunability indicated by good shape fidelity and printability during optimized 3D printing. Moreover, the DNA and biomineralized silica act as nanotherapeutics, enhancing the biological activity of the dressings in terms of reactive oxygen species scavenging, angiogenesis, and anti‐inflammation activity, thereby accelerating acute and diabetic wound healing. These bioinspired 3D‐printed hydrogels produce using a DNA‐induced biomineralization strategy are an excellent functional platform for clinical applications in acute and chronic wound repair.

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“…In addition, the addition of inorganic fillers could overcome the inherent weaknesses of polymer materials, and reduce the crack propagation of the coating. 23 However, the nanoparticles are apt to generate agglomeration due to the larger specific surface energy, and the uneven distribution of the nanofillers has a very negative impact on the wear resistance of the coating. 24 Generally, the nano-filler and the polymer matrix are combined by mechanical interlocking, and the low interface bonding strength between the filler and the resin matrix easily causes a decrease of the enhancement effect.…”

Section: Introductionmentioning

confidence: 99%

Enhanced mechanical and tribological properties of epoxy‐based coatings by in‐situ synthesized silicon dioxide nanoparticles

Liao

Cao

et al. 2022

J of Applied Polymer Sci

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Friction and wear behaviors severely inhibit the regular operation and lifetime of mechanical components served in the ocean extreme environment. Herein, we report a novel in-situ synthesis strategy for fabricating silicon dioxide nanoparticles-reinforced epoxy (EP)-based composite coatings. The crystalline phases, sizes, morphologies, and reaction mechanism of the in-situ-synthesized nanoparticles were characterized, and the mechanical and tribological properties of the EP-silicon dioxide based composite coatings were also investigated in detail. The results showed that the in-situ-synthesized nanoparticles with a size about 100-150 nm were in an amorphous state and were covalently grafted onto the epoxy resin matrix. The thermal stability, nano-hardness and scratch-resistance of the composite coatings have been significantly improved. Moreover, the appropriate nanoparticles greatly reduced the wear rates of the epoxy composite coatings, which decreased by two orders of magnitude than that of pure EP coating when their incorporation content reaches 20 wt%.Additionally, the wear rate of the 15 wt% composite coating under the seawater medium decreased by 79.5 compared to that of pure coating.

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Silica-polyethersulfone core–shell nanoparticles as multifunctional filler for marine applications

Cited by 13 publications

References 54 publications

Interfacial Coordination Interaction Enables Soft Elastomer Composites High Thermal Conductivity and High Toughness

Interfacial Coordination Interaction Enables Soft Elastomer Composites High Thermal Conductivity and High Toughness

3D‐Printed Functional Hydrogel by DNA‐Induced Biomineralization for Accelerated Diabetic Wound Healing

Enhanced mechanical and tribological properties of epoxy‐based coatings by in‐situ synthesized silicon dioxide nanoparticles

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