异丙基三油酸酰氧基钛酸酯改性 纳米纤维素阻隔涂层的制备及性能.

In this paper, isopropyl triolein titanate is used as the modifier to modify the cellulose nanofiber (CNF), then the modified cellulose nanofiber is coated on the surface of A4 paper, and cured to obtain isopropyl triolein titanate (KR-TTS) modified nanocellulose paper-based barrier coating. The hydrophobicity and mechanical property of blank paper, nanocellulose paper-based coating (CNF coating), isopropyl triolein titanate modified nanocellulose paper-based coating with different KR-TTS/CNF mass ratios (K-CNF coating) are characterized by video optical contact measuring instrument and electronic tensile machine. The results show that the K-CNF coating sample with a KR-TTS/CNF mass ratio of 151 has the largest water contact angle, which is 113.4° and 98.4° higher than that of CNF coating and has better hydrophobicity. Compared with the CNF coating, the tensile strength, elastic modulus and toughness of the coating sample are increased by 156.73%, 101.69% and 430.41 %, respectively. The sample exhibits better mechanical properties. The barrier performance test of the coating shows that the air permeability of the modified coating sample with a mass ratio of KR-TTS/CNF of 1:1 is 25234 s/25 cm", which is 46.65 times lower than that of the CNF coating. Water vapor transmission rate is 1 203.67 g/mJ • 24 h, which is 73.47% lower than the CNF coating, and the barrier performance is well. In addition, the SEM images of the modified coating samples show that the tightly wound 3T) network structure fills the paper pores that the CNF coating fails to fill, forming a denser coating and giving it better barrier properties and toughness. [ABSTRACT FROM AUTHOR]