Design and Preparation of Multiple Function-Integrated Lignin/Tannin/ZnONP Composite Coatings for Paper-Based Green Packaging
| Autor: | Shiyu Fu, Huihui Xie, Yunsi Liu, Xinxin Liu, Hui Zhang, Shenglong Tian |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Composite number Bioengineering 02 engineering and technology Permeance engineering.material 010402 general chemistry medicine.disease_cause Lignin 01 natural sciences Biomaterials chemistry.chemical_compound Coating Tensile Strength Mold Ultimate tensile strength Product Packaging Materials Chemistry medicine Cellulose Coated paper 021001 nanoscience & nanotechnology Anti-Bacterial Agents 0104 chemical sciences chemistry Chemical engineering engineering 0210 nano-technology Antibacterial activity Tannins |
| Zdroj: | Biomacromolecules. 22:3251-3263 |
| ISSN: | 1526-4602 1525-7797 |
| DOI: | 10.1021/acs.biomac.1c00340 |
| Popis: | Lignin/tannin/ZnONP composite coatings were designed for paper-based green packaging. Multiple functions, such as high strength, moisture resistance, low air permeance, heat endurance, UV aging resistance, and antibacterial/mold properties, were successfully integrated into one biobased coating. Prepolymerization improved the physical properties of coatings at high lignin contents. The best ingredient ratio was: 40% lignin, 15% tannin, and 10% ZnONPs (based on tannin weight), and the as-prepared biocoating was labeled LTZn-10. After coated with LTZn-10, the tensile strength and bursting strength of the packaging were efficiently enhanced by more than 3 times and were dramatically increased by 51.6 and 5.6 times at the wet state, respectively, which reveals that the packaging has favorable moisture resistance and it can be used in high humidity environments. Scanning electron microscopy (SEM) proved that most of the pores on the paper were blocked by the coatings, which helped to decrease the air permeance by 10.3 times. Meanwhile, ZnONPs were evenly spread on the coatings, which endowed the packaging with excellent antibacterial/mold performance. No colony or mycelium was found in the test against Gram-negative/positive bacteria and eight common molds. Besides, antibacterial activity is only available while the bacteria come in contact with the coating and no active substances were released into the culture medium, which is a good property that can keep the cargo from contamination of antibacterial agents. In addition, the coated paper presented an improved Tg and thermal degradation temperature, indicating that the coated package has favorable thermostability and can maintain its outstanding physical properties in a wider temperature range. Lignin and tannin promoted the UV stability and service life of the coated paper, as a rare physical decrease was observed after UV aging for 72 h. The function-integrated biobased coating with favorable sustainability is a good candidate to be widely used in paper-based green packaging fields. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|