review · Molecules
Natural starch displays several processing drawbacks, including retrogradation, high viscosity, poor freeze-thaw stability, and gel opacity. Developing starch nanoparticles through physical, chemical, and enzymatic techniques helps overcome these constraints while introducing new functionalities. Common preparation methods include acid hydrolysis of amorphous starch regions, enzymatic treatment using pullulanase or isoamylase, and mechanical approaches such as extrusion, irradiation, ultrasound, and precipitation. Among these, nano-precipitation and ultra-sonication provide simple, reliable, and cost-effective routes to particle production. Ultra-sonication reduces particle size by breaking covalent bonds through intense shear forces from collapsing micro-bubbles, while nano-precipitation involves mixing diluted starch solutions into non-solvents. The resulting particles find utility in food packaging by improving mechanical strength and water vapour resistance, in paper coatings, as medical drug delivery carriers, and as alternatives to activated carbon in wastewater treatment.
Conventional starch often performs poorly in manufacturing because of handling, stability, and viscosity issues. Converting starch into nanoscale particles resolves these weaknesses, creating sustainable, bio-based alternatives. This approach enables stronger biodegradable food packaging, better paper coatings, targeted medical drug delivery systems, and affordable materials for purifying wastewater.
This technology could benefit food packaging manufacturers, paper mills, pharmaceutical developers, and water treatment operators. It enables stronger barrier films, targeted therapeutic carriers, and economical wastewater adsorbents. The research represents early-stage to applied process development, focusing on identifying simple, cost-effective manufacturing methods such as nano-precipitation and ultra-sonication to support broader use.
AI-generated from the published abstract. Always read the original work before citing.
Starch is affected by several limitations, e.g., retro-gradation, high viscosity even at low concentrations, handling issues, poor freeze-thaw stability, low process tolerance, and gel opacity. In this context, physical, chemical, and enzymatic methods have been investigated for addressing such limitations or adding new attributes. Thus, the creation of biomaterial-based nanoparticles has sparked curiosity. Because of that, single nucleotide polymorphisms are gaining a lot of interest in food packaging technology. This is due to their ability to increase the mechanical and water vapor resistance of the matrix, as well as hide its re-crystallization during storage in high-humidity atmospheres and enhance the mechanical properties of films when binding in paper machines and paper coating. In medicine, single nucleotide polymorphisms (SNPs) are suitable as carriers in the field of drug delivery for immobilized bioactive or therapeutic agents, as well as wastewater treatments as an alternative to expensive activated carbons. Starch nanoparticle preparations can be performed by hydrolysis via acid hydrolysis of the amorphous part of a starch molecule, the use of enzymes such as pullulanase or isoamylase, or a combination of two regeneration and mechanical treatments with the employment of extrusion, irradiation, ultrasound, or precipitation. The possibility of obtaining cheap and easy-to-use methods for starch and starch derivative nanoparticles is of fundamental importance. Nano-precipitation and ultra-sonication are rather simple and reliable methods for nanoparticle production. The process involves the addition of a diluted starch solution into a non-solvent, and ultra-sonication aims to reduce the size by breaking the covalent bonds in polymeric material due to intense shear forces or mechanical effects associated with the collapsing of micro-bubbles by sound waves. The current study focuses on starch nanoparticle manufacturing, characterization, and emerging applications.
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DOI: 10.3390/molecules27175497
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