Studies on the selective localization of multi-walled carbon nanotubes in blends of poly(vinylidene fluoride) and polycaprolactone

Li, L.; Ruan, W-H.; Zhang, M-Q.; Rong, Min Zhi

doi:10.3144/expresspolymlett.2015.8

Cited by 30 publications

(24 citation statements)

References 28 publications

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“…As we know, TPU/ABS is an immiscible polymer blend, and the dispersion of MWCNTs in such polymer blends is interesting . Conductive fillers prefer to localize in one of the phases because of the differences in polarities and surface energies . Additionally, due to different chemical nature of the nano‐fillers, different polymers reveal different interfacial interactions with the fillers .…”

Section: Resultsmentioning

confidence: 99%

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

et al. 2017

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Some shape‐memory materials were prepared based on TPU/ABS blends containing pristine and organo‐modified multiwalled carbon nanotubes (MWCNTs). The shape memory and mechanical properties of the samples were investigated. Scanning electron microscopy (SEM) analysis performed on the morphological features of the developed samples showed the presence of pristine MWCNTs and decreased diameter of ABS droplets which were uniformly distributed within TPU matrix. Unexpectedly, the ABS droplets in nanocomposites with organo‐modified MWCNTs were greater than ABS droplets in TPU/ABS/CNT nanocomposites. These differences were attributed to different degrees in interfacial interactions between the modified MWCNT and TPU matrix. The presence of modified MWCNT in TPU matrix could have increased the differences in surface energy and polarity of TPU and ABS and it has disturbed the compatibility of the blend fundamentally. Also, the mechanical and Izod impact properties of the shape memory samples containing pristine MWCNT are better than those samples containing MWCNT‐OH and MWCNT‐COOH. The results showed optimum tensile strength in all samples containing 2 wt% MWCNTs. The shape memory results showed that the shape recovery and fixity of TPU/ABS blend improved significantly with increases in MWCNTs. The pristine MWCNTs improved the shape recovery ratio from 93.88% for the neat TPU/ABS blend to 99.3% for TPU/ABS nanocomposite by just loading MWCNTs at 2 wt%. Surprisingly, the shape fixity changed from 92.98% for the neat blend to 100% by loading of 2 wt% of MWCNT‐OH and 1 wt% of MWCNT‐COOH. The results showed that the functionalized MWCNTs had better performance in shape fixity as compared to its pristine MWCNT counterpart. POLYM. COMPOS., 39:E984–E995, 2018. © 2017 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

et al. 2017

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“…It is an important polymer due to its biodegradability and mechanical properties (Tokiwa, Calabia, Ugwu, & Aiba, 2009). PCL has been used in different fields such as scaffolds in microelectronics (Gomes et al, 2015;Li, Ruan, Zhang, & Rong, 2015), tissue engineering and drug delivery systems (Dash & Konkimalla, 2012;Diab, Jaafar-Maalej, Fessi, & Maincent, 2012;Remya et al, 2013;Shao et al, 2015), as adhesives and in packaging but not in food packaging due to the low melting point of the polymer. For fresh food, storage and transportation always combined with cold storage.…”

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confidence: 99%

Application of permselective poly(ε-caprolactone) film for equilibrium-modified atmosphere packaging of strawberry in cold storage

Yun

Wang

et al. 2017

J Food Process Preserv

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The uniaxial‐stretched poly(ε‐caprolactone) (PCL) films were prepared by a twin‐screw extruder. PCL1 and PCL2 with different thickness about 27 and 46 µm, respectively, wereused for equilibrium‐modified atmosphere packaging of strawberries at 5°C. The permselectivity were evaluated as well as its effects on the shelf life of strawberries. The results showed that the PCL2 films has asuitable water vapor permeability about 775 g/m2·24 hr and CO2/O2 permeability ratio about 9.7 at 5°C. The inner atmosphere of PCL2 can be adjusted by permselectivity of films and respiration of strawberriesto a suitable steady‐state with 1.2–4.2% CO2 and 3–7% O2 and no condensation appeared in PCL2 packages, which maintain quality of strawberries. The strawberry in PCL2 package was marketable by day 22. Compared with PCL1, polyamides/polyethylene (PE) and PE film, PCL2 film greatly enhanced the shelf life of strawberries. Practical applications The biodegradable uniaxial‐stretched poly(ε‐caprolactone) (PCL) films with certain thickness has a suitable water vapor permeability and CO2/O2 permeability ratio was used for equilibrium‐modified atmosphere packaging of strawberries. The film is able to adjust package spontaneously through its perm‐selectivity and respiration of strawberries to a suitable steady‐state inner atmosphere and maintain quality of strawberries. Compared with polyamides/polyethylene and polyethylene film, PCL film greatly enhanced the shelf life of strawberries to 22 days. The environment friendly film can be mass produced and easy to use for daily life. In the future, the gas permeability can be adjusted through thickness and draw ratio and make it suitable for different fruits. Thus, it can replace the traditional fresh‐keeping film and modified atmosphere packaging. Just wrap the fruits or other fresh products in the film without gas filling, can keep freshness of food and decrease the production and transportation costs of fresh food.

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“…According to the ω a value, if ω a > 1, the clay will be preferentially located in the matrix (PET phase); if −1 < ω a < 1, the clay will be preferentially located at the interface between the matrix and the dispersed phase and if ω a <−1, the clay will be preferentially located in the dispersed phase (PCL phase). The surface energies of PET and PCL and the nanoclay C30B, C15A were extrapolated to the melt blending temperature (260 °C) using eqs. and and the values are listed in Table .

- \frac{dγ}{dT} = ((), \frac{11}{9}) * ((), \frac{γ_{0}}{T_{c}}) * {(1 - \frac{T}{T_{c}})}^{2 / 9}

γ = γ_{0} \times {(1 - \frac{T}{T_{c}})}^{\frac{11}{9}}

where γ 0 is the surface tension at 0 K, T c is the critical temperature obtained with Lewin et al recommendations, and T is the temperature of polymers melt blending (K).…”

Section: Resultsmentioning

confidence: 99%

Impact of organoclays on the phase morphology and the compatibilization efficiency of immiscible poly(ethylene terephthalate)/poly(ε‐caprolactone) blends

Saaoui

Benali

Mincheva

et al. 2020

J of Applied Polymer Sci

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Adding nanofillers Cloisite 30B (C30B) and Cloisite 15A (C15A) to poly(ethylene terephthalate) (PET)/poly(ε‐caprolactone) (PCL) (70/30, wt/wt) blends via melt blending can improve their phase morphology and change their interface properties. The effects of the different selective localization of clay on the structure and the morphologies are studied and evaluated by theoretical and experimental methods. It is found that C30B is selectively localized in PET and at the PET‐PCL interface, whereas C15A is mainly localized at the interface. Moreover, the changes in the rheological behavior of the blends are attributed to the formation of clay network‐like structures. X‐ray diffraction, scanning electron microscope, and transmission electron micrograph observations also evidenced an exfoliated and/or intercalated structure of C30B, and intercalated structure of C15A in the blend, together with significant morphology changes of the initially immiscible blend. The relative permeability to PET/PCL of the nanocomposites decreased with the increasing of nanoclays content. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48812.

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Studies on the selective localization of multi-walled carbon nanotubes in blends of poly(vinylidene fluoride) and polycaprolactone

Cited by 30 publications

References 28 publications

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

Shape memory and mechanical properties of TPU/ABS blends: The role of pristine versus organo‐modified carbon nanotubes

Application of permselective poly(ε-caprolactone) film for equilibrium-modified atmosphere packaging of strawberry in cold storage

Impact of organoclays on the phase morphology and the compatibilization efficiency of immiscible poly(ethylene terephthalate)/poly(ε‐caprolactone) blends

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