Experimental Studies and Modeling of the Drying Kinetics of Multicomponent Polymer Films

Velaga, Sitaram P.; Nikjoo, Dariush; Vuddanda, Parameswara Rao

doi:10.1208/s12249-017-0836-8

Cited by 34 publications

(22 citation statements)

References 37 publications

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“…The processes occurring during annealing and drying can be distinguished into distinct drying stages, with considerations of heat and mass transfer phenomena 77 . After the initiation of the annealing step in phase II, the temperature of the substrate increases linearly over time and by a heat-transfer process, the temperature of the thin film increases.…”

Section: Discussionmentioning

confidence: 99%

Out-of-equilibrium processes in crystallization of organic-inorganic perovskites during spin coating

et al. 2021

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Complex phenomena are prevalent during the formation of materials, which affect their processing-structure-function relationships. Thin films of methylammonium lead iodide (CH3NH3PbI3, MAPI) are processed by spin coating, antisolvent drop, and annealing of colloidal precursors. The structure and properties of transient and stable phases formed during the process are reported, and the mechanistic insights of the underlying transitions are revealed by combining in situ data from grazing-incidence wide-angle X-ray scattering and photoluminescence spectroscopy. Here, we report the detailed insights on the embryonic stages of organic-inorganic perovskite formation. The physicochemical evolution during the conversion proceeds in four steps: i) An instant nucleation of polydisperse MAPI nanocrystals on antisolvent drop, ii) the instantaneous partial conversion of metastable nanocrystals into orthorhombic solvent-complex by cluster coalescence, iii) the thermal decomposition (dissolution) of the stable solvent-complex into plumboiodide fragments upon evaporation of solvent from the complex and iv) the formation (recrystallization) of cubic MAPI crystals in thin film.

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Section: Discussionmentioning

confidence: 99%

Out-of-equilibrium processes in crystallization of organic-inorganic perovskites during spin coating

et al. 2021

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“…The drying step is crucial to improve intramolecular interaction between the amylose and amylopectin chains [31]. Drying equipment, including microwaves, hot-air ovens, trays, and vacuum driers, is used for the casting process for easy evaporation of solvents and peeling of films [32]. Quick-drying methods for the casting process have exhibited negative physical and structural behavior [33].…”

Section: Solution Castingmentioning

confidence: 99%

Functionality and Applicability of Starch-Based Films: An Eco-Friendly Approach

Punia

Purewal

Trif

et al. 2021

Foods

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The accumulation of high amounts of petro-based plastics is a growing environmental devastation issue, leading to the urgent need to innovate eco-safe packaging materials at an equivalent cost to save the environment. Among different substitutes, starch-based types and their blends with biopolymers are considered an innovative and smart material alternative for petrol-based polymers because of their abundance, low cost, biodegradability, high biocompatibility, and better-quality film-forming and improved mechanical characteristics. Furthermore, starch is a valuable, sustainable food packaging material. The rising and growing importance of designing starch-based films from various sources for sustainable food packaging purposes is ongoing research. Research on “starch food packaging” is still at the beginning, based on the few studies published in the last decade in Web of Science. Additionally, the functionality of starch-based biodegradable substances is technically a challenge. It can be improved by starch modification, blending starch with other biopolymers or additives, and using novel preparation techniques. Starch-based films have been applied to packaging various foods, such as fruits and vegetables, bakery goods, and meat, indicating good prospects for commercial utilization. The current review will give a critical snapshot of starch-based films’ properties and potential applicability in the sustainable smart (active and intelligent) new packaging concepts and discuss new challenges and opportunities for starch bio composites.

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“…As the thickness of wet strip cast, the rheological and physicochemical properties of the cast solution affect the drying speed. [83,84] These limit the scale-up process, which could affect the final thickness of the dried strip. Furthermore, the selection of solvents depends on the solubility of the API, its stability in the solvents and its heat sensitivity during the drying process.…”

Section: Solvent Castingmentioning

confidence: 99%

Next Steps in 3D Printing of Fast Dissolving Oral Films for Commercial Production

Ehtezazi

Algellay

Hardy

2020

DDF

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: 3D printing technique has been utilised to develop novel and complex drug delivery systems that are almost impossible to produce by employing conventional formulation techniques. For example, this technique may be employed to produce tablets or fast dissolving oral films (FDFs) with multilayers of active ingredients, which are personalised to patient’s needs. In this article, we compared the production of FDFs by 3D printing to conventional methods such as solvent casting. Then, we evaluated the need for novel methods of producing fast dissolving oral films; and why 3D printing may be able to meet the short falls of FDF production. The challenges of producing 3D printed FDFs are identified at commercial scale by referring to the identification of suitable materials, hardware, quality control tests and Process Analytical Technology. In this paper we discuss that the FDF market will grow to more than $1.3 billion per annum in next few years and 3D printing of FDFs may share part of this market. Although, companies are continuing to invest in technologies which provide alternatives to standard drug delivery systems, the market for thin film products is already well established. Market entry for a new technology such as 3D printing of FDFs will, therefore, be hard, unless, this technology proves to be a game changer. A few approaches are suggested in this paper.

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Experimental Studies and Modeling of the Drying Kinetics of Multicomponent Polymer Films

Cited by 34 publications

References 37 publications

Out-of-equilibrium processes in crystallization of organic-inorganic perovskites during spin coating

Out-of-equilibrium processes in crystallization of organic-inorganic perovskites during spin coating

Functionality and Applicability of Starch-Based Films: An Eco-Friendly Approach

Next Steps in 3D Printing of Fast Dissolving Oral Films for Commercial Production

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