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| Preparation of High-strength Barrier Packaging Paper from Guanidine Salt-modified Nanocellulose |
| Received:April 28, 2024 |
| DOI：10.11980/j.issn.0254-508X.2024.11.012 |
| Key Words:dialdehyde oxidation guanidium salt antimicrobial nanocellulose coating |
| Fund Project:浙江省自然科学基金“基于纳米纤维素/木素复合体系流变特性的Pickering乳液结构调控及油水界面协同乳化机制研究”（LQ23C160002）。 |
| Author Name | Affiliation | Postcode | | WU Junyi | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | JIANG Ye | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | YANG Gang | Winbon Schoeller New Materials Co., Ltd., Quzhou, Zhejiang Province, 324400 | 324400 | | YUAN Tianzhong* | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | MAO Xibing | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | XIE Qihang | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | SHA Lizheng | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | ZHAO Huifang | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 | | SUN Qianyu | School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou, Zhejiang Province, 310023 | 310023 |
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| Abstract:Nanocellulose was oxidated by sodium periodate to introduce dialdehyde groups， followed by grafting the guanidium salt to obtain the modified nanocellulose. Then the guanidinium-grafted nanocellulose was utilized as coating material for surface coating and combined with zein， to produce the double layer coated paper with guanidinium-grafted nanocellulose as the inner layer and zein as the outer layer. The results showed that the guanidium salt was successfully grafted onto the surface of dialdehyde nanocellulose， as well as giving antibacterial properties to nanocellulose. The double layer coating method effectively improved the oil and water resistance， tensile strength， and burst strength of paper. The oil resistance grade reached 9， the Cobb60 value decreased to 46.1 g/m2. The tensile strength and burst strength reached 6.30 kN/m and 267 kPa， respectively， and the prepared packaging paper exhibited excellent oil-water barrier properties and mechanical strength. |
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