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Martin Torrejon V, Song H, Wu B, Luo G, Song J. Effect of Starch Type and Pre-Treatment on the Properties of Gelatin–Starch Foams Produced by Mechanical Foaming. Polymers (Basel) 2023; 15:polym15071775. [PMID: 37050389 PMCID: PMC10096918 DOI: 10.3390/polym15071775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/18/2023] [Accepted: 03/20/2023] [Indexed: 04/05/2023] Open
Abstract
Incorporating biopolymers in packaging foams can contribute to a more circular packaging system, utilizing renewable and compostable materials. Gelatin, with its favorable physicochemical properties, allows for producing gelatin foams via mechanical foaming, a well-established and low-investment process. To improve foam properties, starch can be added to the gelatin formulation. However, the variability in the properties of starch powders can impact the polymer blend and, consequently, the properties of the dry foam. This study aimed to investigate the impact of different starch powders from different botanical origins (tapioca and corn) and treatments (native or pregelatinized) on the properties of gelatin–starch foams produced by mechanical foaming. The study successfully produced foams with densities of approximately 45–50 kg/m3 and compression properties comparable to EPS (expanded polystyrene) foams. The starch type and pre-treatment significantly influenced the properties of the foam. Pregelatinized starches exhibited slightly higher densities due to lower foamability caused by higher viscosity. Using starch exhibiting total loss of birefringence led to denser foams with greater compression properties than those with starch with a certain degree of crystallinity remaining. Therefore, selecting the appropriate starch type is crucial when developing starch-based materials to ensure optimal material and processing properties align with application requirements.
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Affiliation(s)
- Virginia Martin Torrejon
- Media and Communication School, Shenzhen Polytechnic, Shenzhen 518055, China
- School of Innovation and Entrepreneurship, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, China
- Centre for Food Policy, Myddelton Street Building, City University of London, London EC1R 1UW, UK
| | - Hang Song
- School of Innovation and Entrepreneurship, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, China
| | - Bingjie Wu
- School of Innovation and Entrepreneurship, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, China
| | - Guidong Luo
- School of Innovation and Entrepreneurship, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, China
| | - Jim Song
- School of Innovation and Entrepreneurship, Southern University of Science and Technology, 1088 Xueyuan Avenue, Shenzhen 518055, China
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Effect of Cultivar Difference and Root Growth Stage on the Thermal, Rheological, and In Vitro Digestibility Properties of Cassava Starch. STARCH-STARKE 2020. [DOI: 10.1002/star.202000157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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