HPMC Polymer

HPMC Polymer

HPMC is a water-soluble, biodegradable polymer with a wide range of applications including food packaging, paper coatings, and cosmetic formulations.hpmc polymer It also has potential as a biocidal agent for the treatment of infectious diseases and cancer (Chiralt, Sanchez-Gonzalez, & Chiralt, 2010).hpmc polymer The film-forming properties of hpmc are highly dependent on its surface and morphological structure. Adding emulsifiers during the production of hpmc enhances its film-forming properties, such as viscosity, tensile strength, and permeability. It is also a natural carrier for various compounds that enhance its antimicrobial properties, such as EOs and natural extracts. Moreover, it can also be incorporated with different nano-particles, such as silver nitrate and titanium dioxide, to improve its antibacterial properties and extend its shelf life during storage (Cabrera, Artacho, & Gimenez, 2006).

hpmc polymer exhibits thermal gelation properties.hpmc polymer When heated above a critical temperature, it forms a crystalline solid that can be separated from the aqueous solution by mechanical agitation or a centrifuge. This property makes it suitable for producing high-performance, transparent films that can protect foods from contamination by microorganisms, light, and oxygen ions. These films can be used to prolong the shelf-life of fresh fruits during transportation and storage, thus enhancing their consumer appeal.

The rheological behavior of hpmc varies with its concentration and type, as well as the temperature of the solution.hpmc polymer Its viscosity decreases with the addition of low-density EOs, but it increases with the addition of high-density EOs. The rheology of hpmc solutions can be characterized by the particle size distribution and kinetic shear rate.

In the present study, a series of HPMC dispersions were prepared and subjected to characterization by FT-IR, SEM, UV-Vis spectroscopy, and particle size analyzer.hpmc polymer The dispersions with high elongation at break and low viscosity were selected for further testing. The selected formulations were then incorporated with different plasticizers and evaluated for their rheological properties, viscosity, tensile force at breaking, and permeability.

The results of the current study show that a printing dispersion with a final polymer concentration of 20 and 10 % w/w in glycerin and propylene glycol showed good rheological properties and sprayability.hpmc polymer Moreover, the pore size distribution curves of Tab-K4M and Tab-K15M exhibited small contributions in the tail region of the smaller pore diameter area, which is an indication of high-quality films with superior physical properties. Furthermore, the addition of beeswax and nanoclay decreased glossiness and brightness (L*) but increased yellowness (b*) and redness (a*). This result is due to the natural affinity of beeswax and nanoclay for HPMC. The color-changing effect was more pronounced with beeswax than nanoclay. This suggests that the presence of beeswax and nanoclay in hpmc can be exploited to add value-added ingredients such as vitamins, minerals, and phenolic compounds into fruit juice and other beverages. The resulting products would have improved nutritional value and could provide an opportunity to reduce the cost of food processing. The authors acknowledge the support of the National Research Council (NRC) and the Ministry of Education and Training, Republic of China (MoE), under grant number NSFC-FOCUS-2014-004 and NIH grant P40GM-103854.

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