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Study on the Application of Environmental Friendly PLA/CNF in Paper Barrier Coating
Received:December 16, 2021  
DOI：10.11981/j.issn.1000-6842.2022.03.86
Key Words:degradable;polylactic acid;modified cellulose nanofibrils;preservative paper with barrier property
Fund Project:国家大学生创新创业项目（202011488034）；浙江省大学生科技创新活动（新苗人才）计划（2020R471011）；浙江大学衢州研究院科技计划项目（IZQ2019-KJ-028）；浙江省重点研发计划项目（2021C02031）；衢州市重点研发计划项目（2021Z01）；衢江区科技计划项目（QJ2019J001、QJ2020012、QJ2020022、QJ2021038）。
Author NameAffiliationPostcode
JING Xing* College of Chemistry and Material Engineering, Quzhou University, Quzhou, Zhejiang Province, 324000 324000
HUANG Haiyang College of Chemistry and Material Engineering, Quzhou University, Quzhou, Zhejiang Province, 324000 324000
LUO Huaying Xianhe Corp., Quzhou, Zhejiang Province, 324000 324000
ZHANG Min College of Chemistry and Material Engineering, Quzhou University, Quzhou, Zhejiang Province, 324000 324000
DONG Yunyuan College of Chemistry and Material Engineering, Quzhou University, Quzhou, Zhejiang Province, 324000 324000
CHEN Xiaobin College of Chemistry and Material Engineering, Quzhou University, Quzhou, Zhejiang Province, 324000 324000
CHEN Xinzhi Quzhou Research Institute, Zhejiang University, Quzhou, Zhejiang Province, 324000 324000
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Abstract:
      Polylactic acid （PLA） as matrix and acetylated modified cellulose nanofibril （m-CNF） as reinforcing material were used to prepare composite coating which was coated on the surface of A4 paper to prepare PLA/m-CNF barrier paper， and effects of additive amount of m-CNF in composite coating on barrier property， hydrophobicity， and strength of the barrier paper were discussed. Compared with base paper， when the additive amount of m-CNF is 3%， the tensile index， burst index， and hydrophobicity of the PLA/m-CNF3% barrier paper increase by 30.6%， 40.1%， and 24.8%， respectively， while the air permeability decreases by 36.6%. The water vapor transmission of base paper is 1815 g/（m2·d） whereas PLA/CNF barrier paper significantly improves the barrier performance on oxygen and water vapor with water vapor transmission of PLA/CNF3% barrier paper of 443 g/（m2·d） and oxygen transmission of 45 cm3/（m2·d·（0.1 MPa）‍）. Compared with PLA/CNF3% barrier paper， the water vapor （385 g/（m2·d）） and oxygen （35 cm3/（m2·d·（0.1 MPa））） transmission of PLA/m-CNF3% barrier paper decreases by 13.1% and 22.2%， respectively， indicating the excellent barrier and preservative performance of the as-prepared PLA/m-CNF barrier paper.
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