Microencapsulated phase change material via Pickering emulsion stabilized by cellulose nanofibrils for thermal energy storage

Kaya, Gulbahar Bahsi; Kim, Yunsang; Callahan, Kyle; Kundu, Santanu

doi:10.1016/j.carbpol.2021.118745

Cited by 22 publications

(21 citation statements)

References 43 publications

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“…The presence of CNFs further reduces the oil droplet size due to their fibrillar percolation network that increased the viscosity of the aqueous phase and provided steric hindrance against the coalescence of oil droplets. [ 40 ] The CNFs were expected to accumulate at the oil–water interface interacting with the CLPs. Scanning electron microscopy (SEM) image of the obtained emulsion after the addition of CNF confirmed this hypothesis, showing that PCL droplets were entirely covered with both CLPs and CNF (Figure 1b).…”

Section: Resultsmentioning

confidence: 99%

Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Kimiaei

Farooq

Grande

et al. 2022

Adv Materials Inter

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frontier of materials science, designing biobased solutions that compete with conventional fossil-based plastics is crucial. Cellulose nanofibrils (CNFs) are prominent contenders for high-performance applications due to their nanoscale dimensions, [1] large surface area, [2] and exceptional mechanical characteristics. [3] The strength of CNF-based materials is a consequence of extensive hydrogen bonding between fibrils arising from the presence of surface hydroxyl groups. However, these hydroxyl groups efficiently bind water molecules, increasing moisture sensitivity and reducing wet strength. [4] In addition, the hydrophilic nature of CNFs hinders their combination with hydrophobic polymers, which is an obstacle to developing CNF-reinforced polymer nanocomposites with high modulus and ductility due to the poor compatibility between CNF and polymer matrix. [5] Several strategies, such as esterification, [6] silylation, [7] acetylation, [8] urethanization, [9] amidation, [10] and polymer grafting, [11] are frequently employed for the surface modification of CNFs to enhance the hydrophobicity. In recent studies, engineering the interface of CNF and hydrophobic polymers by reactive compatibilizers such as amphiphilic block and random copolymers is shown as a versatile tool to improve the miscibility of CNF with polymer matrices in melt processing. [12,13] However, hydrophobization strategies mostly target the surface hydroxyl groups, which curtail the hydrogen bonding pattern within the CNF network and lead to mechanically weaker material with poorer oxygen barrier properties than pure CNF nanopapers. [14] Furthermore, these chemical modifications increase the environmental impact of the material production process and hamper CNF's natural biodegradability, [15] a motivating factor for using CNF. Furthermore, to uplift the CNF status as an ultimate material platform for biomaterial design, the critical challenges associated with water interaction and its dispersion in hydrophobic media need to be addressed in a sustainable and scalable manner. To address these perplexing challenges, we suggest a natureinspired solution exploiting the inherent properties of CNF and another natural polymer, lignin. The conversion of crude Free-standing nanocellulosic films (nanopapers) emerge as attractive sustainable materials to replace traditional plastics. However, the moisture sensitivity of cellulose and its poor dispersion in hydrophobic polymers are challenges to its widespread application. Harnessing the inherent properties of cellulose, lignin, and polycaprolactone, a Pickering emulsion approach is proposed to produce multifunctional cellulose nanofibril (CNF) nanocomposite films. Aqueous CNF dispersion is combined with hydrophobic polycaprolactone (PCL) using colloidal lignin nanoparticles (CLPs) as the emulsion stabilizer. CNF-PCL nanocomposite films with over 134% increase in dry strength compared to nanocomposites without CLPs are fabricated. This interfacial engineering strategy results in a CNF-based nanocomposite with...

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Section: Resultsmentioning

confidence: 99%

Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Kimiaei

Farooq

Grande

et al. 2022

Adv Materials Inter

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“…For this purpose, Pickering emulsions have received considerable attention lately since particle-stabilized emulsions that are solidified into beads are normally more stable compared to surfactants-based. Furthermore, surfactants may also leach out (Bahsi Kaya et al, 2022). These beads can be regarded as microspheres that can then be dispersed into a matrix to form a composite (Shi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Wet spinning of strong cellulosic fibres with incorporation of phase change material capsules stabilized by cellulose nanocrystals

Samanta

Nechyporchuk

Bordes

2023

Carbohydrate Polymers

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“…[18][19][20] In particular, the utilization of microencapsulation technology not only prevents leakage of PCM from the insulation system but also improves thermal conductivity by increasing the specific surface area between the PCM and matrix. [21][22][23][24][25][26] Shell materials, fabricated using engineering polymers, inorganic materials, or their hybrids, have been employed to provide excellent sealing capability, structural flexibility, and resistance to volume change induced by repeated phase transformations. [27][28][29][30] However, the formation of a robust shell necessitates complex synthetic procedures such as polymerization, [31] polycondensation, [32] sol-gel reaction, [33] and even sintering.…”

Section: Introductionmentioning

confidence: 99%

Shear‐Responsive Sol–Gel Transition of Phase Change Material Emulsions for an Injectable Thermal Insulation Platform

Sun,

Yang,

Jeon

et al. 2023

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Phase change materials (PCMs) have attracted significant attention as promising insulating materials. However, they often suffer from the simple yet critical problem of leakage in practical applications. Therefore, in this study, an injectable PCM emulsion insulation platform is developed. For this, n‐hexadecane, as a PCM, emulsion droplets are armored with a metal‐organic membrane (MOM) through the coordination of zinc ions and phytic acid. The MOM layer not only provides a rigid interfacial modulus but also allows the emulsion to exhibit viscoelastic behavior by shear stress‐induced interdrop association. This MOM‐enveloped PCM emulsion (PCMEMOM) exhibited typical sol–gel transition behavior in response to applied shear stress, indicating the injectable characteristic of the PCMEMOM. After observing the rheological hysteresis and thermal stability of the PCMEMOM under repetitive heating and cooling cycles, the thermal insulation performance of PCMEMOM is quantitatively and visually demonstrated. These findings suggest an efficient method to exploit high‐performance insulation systems.

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Microencapsulated phase change material via Pickering emulsion stabilized by cellulose nanofibrils for thermal energy storage

Cited by 22 publications

References 43 publications

Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Lignin Nanoparticles as an Interfacial Modulator in Tough and Multi‐Resistant Cellulose–Polycaprolactone Nanocomposites Based on a Pickering Emulsions Strategy

Wet spinning of strong cellulosic fibres with incorporation of phase change material capsules stabilized by cellulose nanocrystals

Shear‐Responsive Sol–Gel Transition of Phase Change Material Emulsions for an Injectable Thermal Insulation Platform

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