**4. Conclusions**

In this work, the HNTs were etched and then loaded with CIN, and the food functional packaging film with continuous release and antibacterial activity were prepared by solvent volatilization. It was confirmed that the cavities of HNTs were etched and their specific surface area increased significantly after sulfuric acid treatment. CIN was first loaded by T-HNTs and then added to SA matrix, which greatly improved the mechanical properties of the film and the barrier property of water vapor. In addition, the combined effect of T-HNTs and CIN could increase the UV shielding effect while losing less transparency. In the release experiment, the SA/T-HNTs-CIN film could be released continuously in the fatty food simulation solution for 216 h, which was 144 h longer than that of SA/CIN film. The antibacterial activity of SA/T-HNTs-CIN film against *S. aureus* and *E. coli* was longer by five days and four days than that of SA/CIN film without T-HNTs.

**Author Contributions:** Conceptualization, R.C. and Y.Q.; methodology, M.Y. (Mingwei Yuan) and M.Y. (Minglong Yuan); formal analysis, R.C. and B.Z.; investigation, R.C. and J.Y.; resources, G.C.; data curation, M.Y. (Mingwei Yuan); writing—original draft preparation, R.C. and Y.Q.; writing— review and editing, R.C. and B.Z. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the National Natural Science Foundation of China (No. 32060569 and 21576126), Yunnan Province "Thousand Talents Program" project training project (YNQR-CYRC-2018-012) and Major Science and Technology Project of Yunnan Province, China (2019ZF010).

**Conflicts of Interest:** The authors declare no competing financial interest.
