PVA/CNF/MBP涂布对纸张疏水防油性能研究

Study on PVA/CNF/MBP Coating on the Hydrophobic and Oil-proof Performance of Paper

关键词:  防油  疏水  抗张强度  纳米微纤丝  微纳化竹粉

Key Words:oil-proof  hydrophobicity  tensile strength  micro-nano fibril  micro-nano bamboo powder

摘要:在聚乙烯醇（PVA）中，添加纤维素纳米纤丝（CNF）和微纳化竹粉（MBP），制备了防油性能更高的PVA/CNF/MBP复合涂布液，探究了不同涂布体系、不同CNF与MBP质量比对涂布纸张疏水防油性和抗张强度的影响。结果表明，当涂布量为2.0 g/m²、CNF与MBP的总添加量为PVA的3.0%，CNF∶MBP质量比为4∶6时，PVA/CNF/MBP涂布纸性能最好，防油等级为12级，Cobb值为21.29 g/m²，接触角为73.56°，纵、横向抗张指数分别为68.6 N∙m/g和41.7 N∙m/g。

Abstract:Cellulose nanofibril （CNF） and micro-nano bamboo powder （MBP） were added into polyvinyl alcohol （PVA） to prepare a PVA/CNF/MBP composite coating solution with higher oil resistance. The effects of different coating systems and different mass ratios of CNF and MBP on the hydrophobicity， oil repellency and tensile strength of coated paper were investigated. The results showed that the performance of PVA/CNF/MBP coated paper was the best， when the coating amount was 2.0 g/m²， the total addition amount of CNF and MBP was 3.0% of polyvinyl alcohol， and the mass ratio of CNF∶MBP was 4∶6. At this time， the oil repellency grade of the prepared coated paper was 12， the Cobb value was 21.29 g/m²， the contact angle was 73.56°， and the vertical and horizontal tensile indexes were 68.6 N∙m/g and 41.7 N∙m/g， respectively.