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Sonakshi Maiti

Bio: Sonakshi Maiti is an academic researcher from University of Calcutta. The author has contributed to research in topics: Differential scanning calorimetry & Biodegradation. The author has an hindex of 10, co-authored 12 publications receiving 401 citations. Previous affiliations of Sonakshi Maiti include Nanjing University of Information Science and Technology.

Papers
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Journal ArticleDOI
TL;DR: Higher thermal stability and crystallinity of nano-cellulose were observed compared to that of precursor from TGA/DSC study, as well as particle size analysis and XRD study.

208 citations

Journal ArticleDOI
TL;DR: In this article, a green method was used to defibrillate paper pulp into nanofibrils, which were then blended with PVA in an aqueous system to prepare transparent composite film.
Abstract: A green method—joint mechanical grinding and high pressure homogenization—was used to defibrillate paper pulp into nanofibrils. The prepared cellulose nanofibrils (CNF) were then blended with PVA in an aqueous system to prepare transparent composite film. The size and morphology of the nanofibrils and their composites were observed, and the structure and properties were characterized. The results showed that CNFs are beneficial to improve the crystallinity, mechanical strength, Young’s modulus, T g and thermal stability of the PVA matrix because of their high aspect ratio, crystallinity and good compatibility. Therefore, nano cellulosic fibrils were proven to be an effective reinforcing filler for the hydrophilic polymer matrix. Moreover, the green fabrication approaches will be helpful to build up biodegradable nanocomposites with wide applications in functional environmentally friendly materials.

156 citations

Journal ArticleDOI
TL;DR: In this article, the effect of crosslinkers on the biodegradation behavior of starch/polyvinyl alcohol (PVA) blend films was investigated by weight loss study, Scanning electron microscopy (SEM) and differential scanning calorimetry (DSC).
Abstract: The effect of crosslinkers on the biodegradation behavior of starch/polyvinyl alcohol (PVA) blend films was investigated by weight loss study, Scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). Starch/PVA films were prepared by solution casting method and 5 weight% of four different crosslinking agents like epichlorohydrin, formaldehyde, zinc oxide and borax were used in four different sets to crosslink the films. These crosslinked starch/PVA films were biodegraded in compost. Weight loss study showed that crosslinking retarded the biodegradation of the films in the first 15 days, but after that, there was a significant increase in weight loss. The DSC analysis revealed that the consumption of starch and consequent rearrangement of the PVA molecules were distinctly different in the crosslinked films due to the effect of different crosslinking agents.

34 citations

Journal ArticleDOI
TL;DR: In this article, the change in molecular weights of PMMA in the biodegraded samples was determined by Gel Permeation Chromatography (GPC), which indicated a significant change in the chemical structure of IPC after biodegradation.

31 citations

Journal ArticleDOI
TL;DR: In this article, epoxidized sun flower oil (ESFO) was incorporated into PLA matrix and the thermal, mechanical, biodegradation, optical transmission properties and fracture morphology of ESFO plasticized PLA were investigated.
Abstract: Polylactide (PLA) is one of the most promising materials among the renewable source-based biodegradable plastics. However, high inherent stiffness and brittleness of the pure PLA is often insufficient for wide range of engineering applications. One of the best ways to improve the processability, toughness and flexibility of PLA is to plasticize with epoxidized plant oils. In this work, epoxidized sun flower oil (ESFO) was incorporated into PLA matrix. The thermal, mechanical, biodegradation, optical transmission properties and fracture morphology of ESFO plasticized PLA were investigated to make a comparison with that of PLA plasticized by commercial epoxidized soya bean oil (ESO). Results show that a remarkable improvement of elongation at break was observed in the case of ESFO incorporated PLA. Although a slightly decrease the T g of PLA was resulted from the plasticizing effects of ESFO, the thermal stability of the plasticized PLA was improved. On the other hand, the ESFO plasticized PLA showed a higher level of UV adsorption but a lower level of biodegradation ratio. After all, ESFO exhibited similar effects on the biodegradable PLA films to ESO, which is anticipated to be a good candidate for plasticizing biodegradable polymer materials.

17 citations


Cited by
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Journal ArticleDOI
TL;DR: This work discusses the main areas of nanocellulose research: photonics, films and foams, surface modifications, nanocomposites, and medical devices.

659 citations

Journal ArticleDOI
TL;DR: In this paper, the background of nanocellulose originated from lignocellulosic biomass and the typical extraction methods and general applications are summarized, in which the nanocellulate extraction methods related to ball milling are mainly introduced.

539 citations

Journal ArticleDOI
TL;DR: In this paper, the authors introduce recent advances in the development of cellulose nanomaterials and the construction of high order structures by applying some principles of colloid and interface science.
Abstract: In this review we introduce recent advances in the development of cellulose nanomaterials and the construction of high order structures by applying some principles of colloid and interface science. These efforts take advantage of natural assemblies in the form of fibers that nature constructs by a biogenetic bottom-up process that results in hierarchical systems encompassing a wide range of characteristic sizes. Following the reverse process, a top-down deconstruction, cellulose materials can be cleaved from fiber cell walls. The resulting nanocelluloses, mainly cellulose nanofibrils (CNF) and cellulose nanocrystals (CNC, i.e., defect-free, rod-like crystalline residues after acid hydrolysis of fibers), have been the subject of recent interest. This originates from the appealing intrinsic properties of nanocelluloses: nanoscale dimensions, high surface area, morphology, low density, chirality and thermo-mechanical performance. Directing their assembly into multiphase structures is a quest that can yield useful outcomes in many revolutionary applications. As such, we discuss the use of non-specific forces to create thin films of nanocellulose at the air–solid interface for applications in nano-coatings, sensors, etc. Assemblies at the liquid–liquid and air–liquid interfaces will be highlighted as means to produce Pickering emulsions, foams and aerogels. Finally, the prospects of a wide range of hybrid materials and other systems that can be manufactured via self and directed assembly will be introduced in light of the unique properties of nanocelluloses.

508 citations

Journal ArticleDOI
TL;DR: In this paper, the applications of metal-hybrid nanocellulose composites in catalysis are reviewed, without the use of metal nanoparticles, and the first part illustrates their use as support, stabilizer and/or reducing agent in the synthesis of various metal nanoparticle.

458 citations

Journal ArticleDOI
TL;DR: Highlights • Extraction methods of nanocellulose, surface modification of cellulose fibers, and latest patents trends on cellulose nanocomposites.

399 citations