Natural Rubber Field Latex (NRFL) allergens restrict its use in some markets due to health-threatening allergic reactions. These molecules are proteins that are related to asymptomatic sensitization and hypersensitivity mediated by immunoglobulin E (IgE). Although NRFL allergens have been investigated since the 1980s, there are still gaps in knowledge regarding the development of deproteinized natural rubber (DPNR). Therefore, in this study, the deproteinization of NRFL from the lower basin of the Cauca River, Antioquia-Colombia was evaluated using eight systems. The highest removal value was 84.4% and was obtained from the treatment containing SDS (Sodium dodecyl sulfate), Urea, and Ethanol. It was also possible to determine that at high concentrations of SDS, removal percentages higher than 70% are reached. On the other hand, all deproteinizing systems decreased NRFL Zeta potentials without self-coagulation, suggesting enhanced colloidal stability in DPNR latex. On the other hand, the bibliometric analysis presented technological advances in DPRN through different parameters and bibliometric networks. The analysis presented makes an important contribution from the bibliometric approach that could be positive for the development of research on DPNR.

This study explores how three distinct preservation techniques affect the microstructure and rheological properties of natural rubber latex. Traditional ammoniated systems were compared against two emerging eco-friendly preservatives developed by AFLatex Technologies, which demonstrated enhanced latex properties reported in Ammonia-Free Latex Compositions, US Patent Application 63/267,167.2022. 2023. Rheological data were modeled using the Cross model to capture the non-linearity of viscosity and the Krieger–Dougherty (K&D) model to describe viscosity as a function of volume fraction. We also proposed an extended K&D model to better fit experimental observations. Additionally, Taylor–Couette flow simulation were performed to investigate shear-induced particle migration, providing insights into the dynamic behavior of particles under varied shear conditions. Our findings showed differences in critical volume fraction; the ammoniated system exhibited a critical volume fraction range of 0.6–0.7, while the ammonia-free systems had a lower range of 0.4–0.55. These values align closely with the predication from the Cross model, which suggests critical volume fraction of 0.4–0.5 for ammonia-free systems and above 0.6 for ammoniated systems. The extended and original K&D models corroborated these findings, with the ammonia-free systems typically reaching a critical volume fraction of 0.55 and the ammoniated systems approaching 0.7. Simulations under simplified assumptions revealed that shear-induced migration can maintain approximately 20% of the particles at a critical volume fraction of around 0.48, underscoring the complex interplay of particle dynamics and preservation technique in determining natural rubber latex material properties.