Synthesis and characterization of natural rubber/graphene quantum dot nanocomposites

Joy, Josny; Abraham, Jiji; Rajeevan, Sreelakshmi; George, Soney C.

doi:10.1007/s10965-021-02713-9

Cited by 13 publications

(6 citation statements)

References 13 publications

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“…Compared to DCM‐extracted TPV, it was clear that DCM‐extracted PTPV formed a new FTIR absorption peak at 3671 cm −1 which was related to OH groups (Figure 4A). [ 32 ] In Figure 4A, the DCM‐extracted PTPV showed a stronger absorption peak compared to the DCM‐extracted TPV near 1100 cm −1 , which was associated with the antisymmetric stretching vibration peak of SiOSi of PDMS‐NH 2 (new absorption peak)and the asymmetric and symmetric stretching of the CO bond of PLA grafted on ENR mentioned above. [ 38 ] More obviously, the DCM‐extracted PTPV showed a new absorption peak compared to the DCM‐extracted TPV at 780 cm −1 , which was associated with the asymmetric stretching vibration of the SiCH 3 bond of PDMS‐NH 2.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 3A shows the absorption spectra of the neat ENR and ENR/DCP samples in the range of 1500–4000 cm −1 . For ENR, the absorption peak at 1663 cm −1 was the characteristic absorption peak of C═C, [ 32 ] and the large band at 3000 to 3300 cm −1 was related to CH groups (α‐methylene). A weakening of the characteristic absorption peak of the double bond (C═C) could be observed in the cross‐linked ENR phase (ENR/DCP sample), indicating that the unsaturated double bond of ENR was opened during the dynamic vulcanization process.…”

Section: Resultsmentioning

confidence: 99%

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Bio‐based polylactic acid or epoxy natural rubber thermoplastic vulcanizates with dual interfacial compatibilization networks

Liu

2022

Polymer Engineering & Sci

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The bio-based thermoplastic vulcanizates (TPVs) composed of polylactic acid (PLA) and epoxidized natural rubber (ENR) was prepared by the dynamic vulcanization method induced by dicumyl peroxide (DCP), and a novel filler, bis(aminopropyl)-terminated polydimethylsiloxane (PDMS-NH 2 ), was added as the compatibilizer. The dynamic vulcanization reaction occurred first, and the PLA-g-ENR graft copolymer was formed at the interface of PLA and ENR.With the addition of appropriate amount of PDMS-NH 2 , the cross-linking of ENR was enhanced, and the size of PLA became smaller and more evenly dispersed. The prepared TPVs were found to have dual interfacial compatibilization networks. Mechanical characterization of this polymeric material containing a special structure is performed. TPV achieved the tensile strength at break of 12.8 MPa and elongation at break of 103%, revealing 103% and 329% higher than 6.3 MPa and 24% for the simple blend of ENR/PLA. Meanwhile, the elastic modulus of TPV increased to 352 MPa, which was 1.96 times that of the simple blend. As a result, ENR/PLA composites with high toughness and mechanical strength are achieved and the toughening mechanism and toughening factors were discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Bio‐based polylactic acid or epoxy natural rubber thermoplastic vulcanizates with dual interfacial compatibilization networks

Liu

2022

Polymer Engineering & Sci

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“…48 A sharp peak was observed near 1366 cm −1 due to −CH 2 bending vibration. 49 The BCE CDs showed peaks around 1114 cm −1 corresponding to epoxy groups (C−O− C). 43 The peak near 900−667 cm −1 is due to the aromatic outof-plane C−H bending.…”

Section: Characterization Of Banana Corm Extract and In Situ Formed C...mentioning

confidence: 99%

Biopolymer-Mushroom Nanofiber Composite Xerogel Film: Bio-Base-Mediated Green, Chemically Resistant, Edible, and Printable Films

Rahman,

Konwar,

Gogoi

et al. 2023

ACS Sustainable Chem. Eng.

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Poor water and chemical resistance of pure biopolymeric films is a major barrier to their applications in the packaging industry. The present work involves an innovative and novel formulation of biopolymer nanocomposite utilizing a green fabrication process to produce a highly robust, chemically resistant system and printable, flexible polymeric film. This unique concept utilizes the electrostatic interaction between two biopolymeric materials (chitosan and sodium alginate) owing to their inherent functionality, which could be knowingly tuned just by changing the pH of the medium. The films are obtained from a hydrogel prepared by stepwise addition of the components as well as cross-linker in a designed manner. This is for the first time a biological alkaline extract containing carbon dots derived from banana corm (BCE CDs) is used as a cross-linker for biopolymers. In addition, mushroom was used to synthesize a nanofiber and used in the fabrication of nanocomposite film. The synthesis of lignocellulosic nanofibers from mushrooms that avoids the usage of any harmful chemicals in preparing the composite film is demonstrated. Fabricated films show tensile strengths up to ∼59 MPa after optimizing the composition. The film exhibited stability under both acidic and basic pH conditions even after being kept for 24 h. Additionally, it displayed resistance to a broad spectrum of organic solvents. In addition, the films can be used as a substrate for printing technologies, widening the scope of their use in packaging materials. Thus, the work demonstrates the fabrication of green, robust, edible, chemically resistant, and printable biobased nanocomposite flexible films.

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“…[1][2][3] In terms of mechanical properties, these fillers can actually absorb and transfer loads at the filler-matrix interface [1,2,4] whereas for electrical conductivity features, conductive fillers are controlled to create percolated pathways for electrons to flow within the matrix. [1,2,4] Therefore, there is an increase rate of interests of application of elastomer-fillers compositions, including; dielectrics, sensors and actuators, [5][6][7][8][9][10] flexible electronics, heat sinks and gaskets, [11][12][13][14] electromagnetic shields, [15] elastomeric quantum dots materials, [16] and many attractive areas. Over the years, water swellable elastomer (WSE) class of polymers have received great attention in academics and industry for several purposes like sealing or expandable materials used in civil constructions for avoiding water leakages in pipes and working joints in concrete, [17][18][19][20] oil and gas drilling fields [19,21,22] and water-responsive and mechanically adaptive sensors [23][24][25][26] etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of hydrophilic and water‐swellable elastomeric nanocomposites

Mensah

Oduro

2023

Polymer Engineering & Sci

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Highly polar and hydrophilic polymers; ethylene‐vinyl acetate (EVA), epichlorohydrin rubber (GECO), and polyethylene oxide (PEO) reinforced with fillers (carbon black (CB) and/or Silica) were used to prepare water‐swellable rubber nanocomposites. The study showed that although the high content of the GECO delayed vulcanization of the corresponding compounds, the sample filled with desired ratio of GECO/PEO/EVA or GPE, cross‐linked with peroxide exhibited the highest swelling performance of ⁓150%. The samples exhibited good re‐usability performance in the re‐swollen test, after drying. At prolonged water swelling, the tensile strength dropped drastically for compounds with high content of the GPE, due to weak filler‐matrix interactions. On the other hand, the incorporated GPE also increased the rebound resilience (%) property which is a key requirement in green tire fabrication. For example; peroxide cured sample coded SR3 (GPE‐15 phr CB) obtained ⁓30% resilience in non‐swollen state and ⁓53.5% after 1440 min of water‐swelling, which represents a dramatic development of over ⁓78% in rebound resilience. Thus, a proper balance between the GPE content, curing agent and the reinforcements may guarantee high water‐swelling performance and mechanical properties integrity for multifunctional applications such as wound healing, structural works, water collection from oil spillages, and for the development of water‐based sensors.

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Synthesis and characterization of natural rubber/graphene quantum dot nanocomposites

Cited by 13 publications

References 13 publications

Bio‐based polylactic acid or epoxy natural rubber thermoplastic vulcanizates with dual interfacial compatibilization networks

Bio‐based polylactic acid or epoxy natural rubber thermoplastic vulcanizates with dual interfacial compatibilization networks

Biopolymer-Mushroom Nanofiber Composite Xerogel Film: Bio-Base-Mediated Green, Chemically Resistant, Edible, and Printable Films

Preparation and characterization of hydrophilic and water‐swellable elastomeric nanocomposites

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