Copper nanoparticles interlocked phase-change microcapsules for thermal buffering in packaging application

Parvate, Sumit; Singh, Jitendra; Vennapusa, Jagadeeswara Reddy; Dixit, Prakhar; Chattopadhyay, Sujay

doi:10.1016/j.jiec.2021.06.029

Cited by 46 publications

(19 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We hypothesize that an increase in the HD content keeping the TiO 2 NP dose constant leads to lesser availability of the Pickering stabilizer at the surface of HD droplets. Consequently, uneven interfacial tension at the HD droplet caused the buckling event . Besides, the possibility of buckling due to phase separation of HD with elastic deformation of the shell depicted by Liu et al cannot be ruled out here.…”

Section: Resultsmentioning

confidence: 82%

See 1 more Smart Citation

Complex Polymeric Microstructures with Programmable Architecture via Pickering Emulsion-Templated In Situ Polymerization

Parvate

Chattopadhyay

2022

Langmuir

Self Cite

View full text Add to dashboard Cite

Aside from smooth and spherical microcapsules, the concept of tailoring complex polymeric microstructures is being taken a step ahead due to their great demand in various applications and fundamental studies in the subjects of microfluidics and nanotechnology. Size, shape, and morphology are of paramount importance for their functional performance and various applications. However, simple, inexpensive, versatile, and high-throughput techniques for fabricating microcapsules with controlled morphology remain a bottleneck for discoveries in the subject of polymer colloids. In this paper, we directly fulfill this need by reporting a novel approach of Pickering emulsion-templated in situ polymerization for tailoring complex polymeric microstructures comprised of a composite shell of titanium dioxide nanoparticle (TiO2 NP)-embedded poly(melamine-urea-formaldehyde) (polyMUF) and a core of hexadecane (HD, soft template). At first, we hydrophobize TiO2 NPs by chemisorbing long-chain biobased myristic acid via a bidentate chelating complex and precisely tune their wettability by varying the grafting density of myristic acid to obtain highly stable oil-in-water (O/W) Pickering emulsion. Thereafter, we employ the optimized TiO2 NPs in the intended encapsulation strategy that enables various microstructures and morphologies with the particle diameter ranging from 5 to 20 μm. Careful manipulation of reaction parameters and copolymer components leads to novel complex microstructures: smooth, raspberry-like, partially budded, hollow, filled, single-holed, and closed-cell-like microstructures. Particle properties such as morphology, size, shell thickness, and core content are governed by the TiO2 NP content, core-to-shell ratio, copolymer component, conversion, and pH value. Based on the results of a series of control experiments, novel mechanisms for the formation of various such microstructures are proposed.

show abstract

Section: Resultsmentioning

confidence: 82%

“…Consequently, uneven interfacial tension at the HD droplet caused the buckling event. 53 Besides, the possibility of buckling due to phase separation of HD with elastic deformation of the shell depicted by Liu et al 54 cannot be ruled out here.…”

Section: ■ Results and Discussionmentioning

confidence: 83%

Complex Polymeric Microstructures with Programmable Architecture via Pickering Emulsion-Templated In Situ Polymerization

Parvate

Chattopadhyay

2022

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…In fact, they fabricated the microcapsules with three layers by a layer‐by‐layer method. To enhance the compatibility within the silica matrix and promote interfacial interactions, Parvate et al 26 used the copper nanoparticles as an interlocking agent between polydivinylbenzene microcapsules and the silica matrix.…”

Section: Introductionmentioning

confidence: 99%

Assessment of mechanical and healing behaviors of glass fibers‐epoxy composite containing the microcapsules with the nanocomposite shell

Ebrahimnezhad‐Khaljiri

Eslami‐Farsani

Mirzamohammadi

2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

In the current study, the effect of adding the encapsulated healing agent with neat polymeric and nanocomposite shells on the mechanical‐healing features of glass fibers/epoxy composite under various loads was investigated. Therefore, the microcapsules with urea‐formaldehyde (UF) nanocomposite shell containing the various weight fraction of silica nanoparticles (0, 1, 2, 3) were synthesized. After that, the flexural, tensile, and interlaminar shear strength (ILSS) samples were destructed by using the quasi‐static penetration method with the damaging force of 500, 1050, and 2900 N, respectively. The maximum healing efficiency in the flexural loads belonged to the composite with the 3 wt% nanosilica on the surface of microcapsules, which was 83.9%. Also, it was found the increment in the weight fraction of silica nanoparticles had a negligible effect on the healing ability of composite under tensile loading. Achieving 135.8% healing efficiency in the composite with the 2 wt% nanosilica under the shear loads can be one of the most important findings in this work.

show abstract

“…Further, PCMs are well known for their application in temperature maintenance during transportation and storage of thermal sensitive food products and vaccines 10 . Johnston et al 11 reported preparation of PCM Rubitherm RT6 (melting at 8°C) composite with nanocalcium silicate porous matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Further, PCMs are well known for their application in temperature maintenance during transportation and storage of thermal sensitive food products and vaccines. 10 Johnston et al 11 reported preparation of PCM Rubitherm RT6 (melting at 8 C) composite with nanocalcium silicate porous matrix. 400 g of composite could provide thermal buffering of 510 minutes for 2 kg asparagus while transportation maintaining temperature below 10 C. Vennapusa et al 12 reported expanded perlite-caprylic acid-based composite (PCM-EP) as PCM in TCP box, where 200 g of PCM-EP composite can able to maintain the temperature of 360 g chocolate below desired temperature (25 C) for 349 minutes.…”

Section: Introductionmentioning

confidence: 99%

Curding of milk in incubator utilizing latent heat of lauric acid in winter

2021

Self Cite

View full text Add to dashboard Cite

The maintenance of incubation temperature (30 C-50 C) for growth of culture is essential during fermentation of milk to curd. This report discusses the issue of maintaining constant temperature of milk for formation of curd using lauric acid (m.p. 45.02 C and f.p. 40.21 C) as phase change material (PCM). Lauric acid possesses phase transition enthalpy, 189.43 kJ kg À1 and was thermally stable till 140 C. A known dimension of a temperature controlling packaging (TCP) box was made by taking 240 g of PCM uniformly distributed inside six polyethylene packets (40 g each) of dimensions identical with that of inner walls of the corrugated box and the packets were placed along inner walls of TCP box. The TCP box containing packets with molten PCM could maintain the temperature of 150 g milk (placed inside box) in between 50 C and 30 C for 160 minutes and helped in curd formation, while the whole assembly was exposed to 1 C of ambient temperature.

show abstract

Copper nanoparticles interlocked phase-change microcapsules for thermal buffering in packaging application

Cited by 46 publications

References 51 publications

Complex Polymeric Microstructures with Programmable Architecture via Pickering Emulsion-Templated In Situ Polymerization

Complex Polymeric Microstructures with Programmable Architecture via Pickering Emulsion-Templated In Situ Polymerization

Assessment of mechanical and healing behaviors of glass fibers‐epoxy composite containing the microcapsules with the nanocomposite shell

Curding of milk in incubator utilizing latent heat of lauric acid in winter

Contact Info

Product

Resources

About