Project's information
| Project's title | Research and manufacture environmentally friendly materials to replace non-biodegradable packaging |
| Project’s code | CT0000.06/21-22 |
| Research hosting institution | Institute of Chemistry |
| Project leader’s name | Assoc. Prof. Dr. Ngo Trinh Tung |
| Project duration | 01/01/2021 - 31/12/2022 |
| Project’s budget | 2,600 million VND |
| Classify | Grade B |
| Goal and objectives of the project | Establishing technological process for manufacture environmentally friendly hydrophobic kraft paper packaging to replace non-biodegradable plastic packaging |
| Main results | Theoretical results:
- Cellulose microfibers were prepared using two different methods: Mechanical grinding method, TEMPO oxidation using TEMPO/NaBr/NaClO oxidation system. By TEMPO oxidation method, nanocellulose has a diameter of 10-20 nm and a length of 40-60 nm. Cellulose microfibers made by mechanical methods have high purity, can be manufactured in large quantities and cheaper than chemical methods
- Research has successfully modified cellulose microfibers with silane agents APTMS and ODA to convert the hydrophilic properties of cellulose microfibers into hydrophobic properties of cellulose microfibers. When modified with APTMS, the water droplet contact angle of the cellulose microfiber coating reached 120º. Similarly, modified with ODA, the water droplet contact angle of the cellulose microfiber coating reached 106º.
- Successfully researched and produced a hydrophobic coating solution based on cellulose microfibers using PVA and starch adhesives for kraft paper. When using PVA adhesive at 0.5% content, ODA modified cellulose content is 0.15%, dipping 3 times, the contact angle reaches 102º. When using the binder as regular starch at a content of 0.8%, the ODA modified cellulose content is 1.2%, the number of dipping times is 3 times, the contact angle reaches 127º
- Preliminary assessment of the biodegradability of kraft paper under composting conditions over a period of 6 months resulted in a weight loss of 60-80%.
- After coating, kraft paper has high hydrophobic properties (> 90º), tear strength index increases from 7.58 to 10.77 mNm2/g, elongation at break increases from 1.72% to 4.71%, tensile strength decreases slightly from 25.4 Mpa to 21.07 Mpa.
- A set of basic standards (TCCS) for hydrophobic kraft paper has been developed, applicable to Kraft paper with paper weight: 150 grams/m2, Humidity: 5-7%, Hydrophobicity with water droplet contact angle > 90o. Biodegradability: 60-80% weight loss under composting conditions over a period of 6 months. |
| Novelty and actuality and scientific meaningfulness of the results | The result has given the process of preperation environmentally friendly hydrophobic coating solution from cellulose microfibres and kraft paper bags to replace non-biodegradable plastic packing. |
| Products of the project | - Technology process: 03
+ 01 Technology process to produce microfibers cellulose from paper pulp
+ 01 Technology process to produce hydrophobic coating solution from cellulose microfibres
+ 01 Technology process to produce hydrophobic coating on kraft paper by modified cellulose microfibers at laboratory
- Scientific papers in referred journals (list): 03
+ International Journal: 02 papers
• Tran Thi Y Nhi, Trinh Duc Cong, Tran Thi Thanh Hop, Luong Nhu Hai, Nguyen The Huu, Ngo Trinh Tung, Surface modification of cellulose microfibrils with silane agent for eco-friendly hydrophobic coatings, Russian Journal of Applied Chemistry, vol 95(3), 379-386, 2022.
• Tran Thi Thanh Hop, Dang Thi Mai, Trinh Duc Cong, Tran Thi Y Nhi, Vu Duc Loi, Nguyen Thi Mai Huong, Ngo Trinh Tung, A comprehensive study on preparation of nanocellulose from bleached wood pulps by TEMPO-mediated oxidation, Results in Chemistry, vol4, 1-6, 2022
+ Domestic Journal: 01 paper
• Nguyen Thi Thuc, Trinh Đuc Cong, Tran Thi Y Nhi,Tran Thanh Hop, Ngo Trinh Tung, Nguyen The Huu, Study on using starch as binder in making hydrophobic coating film for kraft paper based on cellulose microfibers, Journal of chemistry and application, 3(62)/9-2022
- Useful solution
01 useful solution According to Decision No. 22186W/QD-SHTT dated December 31, 2021 of the National Office of Intellectual Property: Process of manufacturing waterproof coatings for paper and waterproof coating preparations obtained from this process
- Technological products (describe in details: technical characteristics, place):
 - Support for training 03 bachelors of Hanoi University of Industry. All science products have completed and exceeded the target compared to the registration description. |
| Images of project |  |