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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 NameAffiliationPostcode
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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