阳离子化纸浆/改性氮化硼纳米片复合纸的制备和导热性能研究

Preparation and Thermal Conductivity Study of Cationized Pulp/Modified Boron Nitride Nanosheet Composite Paper

关键词:  阳离子化纸浆  3-氯-2-羟丙基三甲基氯化铵  氮化硼纳米片  复合纸

Key Words:cationized pulp  3-chloro-2-hydroxypropyl trimethylammonium chloride  boron nitride nanosheets  composite paper

摘要:利用3-氯-2-羟丙基三甲基氯化铵和针叶木纤维反应制备阳离子化纸浆（CMCF），壳寡糖辅助六方氮化硼球磨制备壳寡糖改性氮化硼纳米片（COSBNNSs）。结果表明，COSBNNSs通过静电吸附、氢键等作用留着在CMCF中，COSBNNSs的加入利于导热通路的形成。当COSBNNSs含量达30%时，所获得导热复合纸CMCF/COSBNNSs的热导率最高可达2.07 W/(m·K)，最大应力达33.66 MPa，机械强度和热导率均较高，具有作为热管理基材的潜力。

Abstract:Cationized pulp （CMCF） was prepared by reacting softwood fibers with 3-chloro-2-hydroxypropyl trimethylammonium chloride， while chitosan oligosaccharide-modified boron nitride nanosheets （COSBNNSs） were obtained via ball milling of hexagonal boron nitride with chitosan oligosaccharide as an auxiliary agent. The results showed that COSBNNSs were retained in the CMCF matrix through electrostatic adsorption， hydrogen bond， and other interactions. The introduction of COSBNNSs facilitated the formation of thermal conduction pathways. When the COSBNNSs content reached 30%， the resulting thermal conducting composite paper CMCF/COSBNNSs exhibited a maximum thermal conductivity of 2.07 W/(m·K) and a max strain of 33.66 MPa， demonstrating both high mechanical strength and thermal conductivity， making it a promising candidate for thermal management applications.