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Functional Pectin Film Modified by Chestnut Burr Polyphenols/Cinnamaldehyde Nano Emulsion via Microfluidization for
Haonan Guo1, Yinfei Xu2, Miao Tian1
1School of Chemistry and Materials Science, Shandong Agricultural University, No. 61 Daizong Street, Taian 271000, P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 17, 2026
Summary
Biodegradable pectin films were enhanced with polyphenol-cinnamaldehyde nanoemulsion (PCNE) for improved fruit packaging. The new composite films offer better mechanical strength, UV protection, and antioxidant properties, extending strawberry shelf life.
Area of Science:
- Materials Science
- Food Science
- Polymer Science
Background:
- Pectin-based films are limited in fruit packaging by brittleness, low bioactivity, and high hygroscopicity.
- Developing advanced biodegradable packaging is crucial for reducing plastic waste and improving food preservation.
Purpose of the Study:
- To enhance the physical properties and functionality of pectin films for fruit packaging.
- To develop a novel biodegradable packaging material using polyphenol-cinnamaldehyde nanoemulsion (PCNE) and pectin.
Main Methods:
- Polyphenols were isolated from chestnut burrs and combined with cinnamaldehyde to form PCNE using microfluidic technology.
- Pectin films were modified with PCNE, and their physical, mechanical, barrier, UV-blocking, antioxidant, and antibacterial properties were evaluated.
- The performance of the composite film was assessed in extending the shelf life of strawberries.
Main Results:
- Pectin-PCNE composite films exhibited improved water contact angle, tensile strength, and elongation at break compared to pure pectin films.
- The composite films showed significantly reduced water vapor and oxygen permeability.
- Enhanced UV-blocking (UVC, UVB, and 95% UVA), antioxidant (95.6% DPPH inhibition), and antibacterial properties were observed.
- A marked extension in strawberry shelf life was achieved using the pectin-PCNE composite film.
Conclusions:
- PCNE is an effective additive for improving the bioactivity, mechanical properties, and hydrophobicity of pectin films.
- The pectin-PCNE composite film demonstrates significant potential as a sustainable alternative to petrochemical plastics in fruit packaging.
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