Sustainable cross-linkers from brewers' spent grains for biodegradable packaging materials
This research explores the use of extrusion-modified brewers' spent grains (BSGs) as cross-linkers to enhance the bonding with biobased polymers, aiming to produce sustainable and biodegradable packaging materials. By optimizing extrusion parameters, this solution addresses gaps in biodegradable material development.
Overview
This innovative research focuses on transforming brewers' spent grains (BSGs) into valuable cross-linkers for biodegradable packaging materials. BSGs are a plentiful byproduct of the brewing industry, and their modification could lead to sustainable solutions for packaging applications. The core idea is to use extrusion processing to enhance the functional properties of BSGs, making them compatible with biobased polymers. This results in improved bonding, mechanical strength, and barrier properties, offering a sustainable alternative to conventional packaging materials.
Technical specifications
Key features include:
- Extrusion modification: BSGs are processed using heat, shear, and pressure to induce thermomechanical changes, improving surface reactivity and compatibility with biopolymers.
- Optimization through experimentation: Design of experiments will vary feed rates and screw speeds, with properties such as Specific Mechanical Energy (SME) and particle size distribution being key focus areas.
- Composite manufacturing: BSGs will be mixed with Solanyl biopolymer and PLA, forming composites that are 3D printed for testing.
- Comprehensive analysis: Molecular structure is analyzed using Raman spectroscopy and SEM, while thermal behavior, water resistance, and flexural strength are evaluated.
Technology readiness level
This research is currently at Technology Readiness Level 2, indicating that its basic principles have been observed and reported in a lab setting. Future plans involve sourcing from multiple breweries and further experimentation to refine the process and validate results.
About Montana State University
Montana State University's substantial research enterprise growth has been accompanied by focused investments in innovation and research translation, creating new opportunities for companies to engage with MSU research and expertise. A particular strength is MSU’s network of specialized centers, institutes, and industry-accessible core facilities, which bring together multidisciplinary expertise, advanced research infrastructure, testing capabilities, and established pathways for working with industry partners. MSU is one of a select group of universities participating in the NSF's Accelerating Research Translation (ART) program, which is building the capacity and infrastructure needed to translate more research discoveries into solutions with real-world impact. The growing MSU Innovation Campus and expanding incubator infrastructure provide additional opportunities for university-industry interaction, startup development, and technology-focused companies. These efforts are complemented by MSU’s Technology Transfer Office, which works with researchers and companies to protect and license MSU inventions and facilitate industry-sponsored research collaborations.
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