Integrated physico-chemical analysis platform for plant protein extrusion characterization

Overview

This solution offers an integrated analytical framework for characterizing plant protein functionality in extrusion applications. Unlike starch-based systems, plant proteins are complex biopolymers whose behavior during extrusion cannot be predicted from any single test. By combining an array of physico-chemical analyses with chemistry-based methods and correlating them with end-product performance data, this approach enables a priori modeling of plant protein behavior. The platform supports development of high-protein extruded products including expanded snacks, plant-based meat analogs, and pre-cooked flours.

Technical specifications

Analytical methods integrated into the model:

• Physico-chemical tests: water absorption, rapid viscoanalysis, phase transition analysis, heat gelation, and differential scanning calorimetry (DSC) for heat denaturation dynamics
• Chemical analyses: pH-adjusted solubility profiling, size-exclusion chromatography (SEC-HPLC), and SDS-PAGE for sub-unit identification and molecular weight determination
• End-product characterization: instrumental and sensory evaluation of expansion, hardness, flavor, and aroma in pilot-scale extruded products

Protein systems evaluated:

• Isolated and concentrated proteins such as wheat gluten, pea protein isolate, soy protein isolate, and soy protein concentrate
• Proteins embedded in carbohydrate matrices including chickpea flour and pea flour
• Pilot-scale single and twin-screw extrusion facilities for generating product validation data

Model outputs:

• Predictions of protein flow behavior, gelation capacity, and solubility under extrusion conditions
• Correlation between molecular sub-unit structure and end-product texture and sensory attributes
• Guidance for protein selection and formulation optimization across multiple extrusion applications

Technology readiness level

The conceptual model has been built using existing data sets combining physico-chemical characterization, chemical analysis, and pilot-scale extrusion trials across multiple protein sources. Future validation will expand the test array to include cold water solubility, pH/hydrophilicity relationships, and detailed molecular sub-unit profiling. Pilot-scale single and twin-screw extrusion facilities are available to generate a broader range of product data, strengthening model accuracy. The approach is ready for collaborative refinement and application to specific industry formulation challenges.