Preparation and Characterization of UV-cured Film Made with Double-modified (Esterified-grafted) Corn Starch

LIANG Fengmin; TIAN Chao; GUO Xiulan; FENG Enqi; ZHANG Weide; YUAN Teng

doi:10.19554/j.cnki.1001-3563.2025.17.010

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (17) : 89-95. DOI: 10.19554/j.cnki.1001-3563.2025.17.010

Advanced Materials

Preparation and Characterization of UV-cured Film Made with Double-modified (Esterified-grafted) Corn Starch

LIANG Fengmin, TIAN Chao, GUO Xiulan, FENG Enqi, ZHANG Weide, YUAN Teng^*

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Abstract

The work aims to focus on the field of biomass materials, and prepare high-performance biomass materials by itaconic acid esterification and acrylic acid grafting chemical modification techniques with corn starch, itaconic acid, and acrylic acid as raw materials, so as to deal with the challenges associated with existing starch-based materials, such as difficulty in plasticisation processing, low strength, and low biomass content. A starch photopolymerisation film was prepared with esterified starch as the polymer backbone and acrylic acid (AA) as the graft monomer. The effect of acrylic acid content on the performance of the starch photopolymerisation film was discussed. The performance of the starch photopolymerisation film was studied by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), dynamic mechanical analysis, thermogravimetric analysis (TGA), and tensile testing. The results indicated that after esterification grafting, the crystallinity of corn starch was significantly reduced, and its structural integrity was disrupted. Under optimal conditions, the starch photopolymerisation film exhibited high tensile strength (11.75 MPa), attributed to the formation of abundant hydrogen bonds between starch molecular chains and acrylic acid, thereby enhancing the cross-linking density of the starch photopolymerisation film. DMA results also corroborated this phenomenon. In conclusion, this study not only provides a novel and effective method for the preparation of fully bio-based photopolymerisable films but also significantly enhances the mechanical strength of starch photopolymerisable films, demonstrating great application potential in the field of expandable elastic materials.

Key words

corn starch / light curing / biomass materials

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LIANG Fengmin, TIAN Chao, GUO Xiulan, FENG Enqi, ZHANG Weide, YUAN Teng. Preparation and Characterization of UV-cured Film Made with Double-modified (Esterified-grafted) Corn Starch[J]. Packaging Engineering. 2025, 46(17): 89-95 https://doi.org/10.19554/j.cnki.1001-3563.2025.17.010

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