摘要
目的季铵铜(ACQ)防腐剂中的铜离子易流失,会对环境和人类健康造成威胁,通过生物改性技术来改善ACQ的抗流失性及综合性能。方法采用离子交联法制备纳米壳聚糖溶液,并对ACQ防腐木进行改性,考察纳米壳聚糖−ACQ复合处理后防腐木的抗流失性及物理特性。结果当壳聚糖与三聚磷酸钠溶液的质量比为51∶时,壳聚糖纳米粒子的平均粒径为376 nm;纳米壳聚糖与铜离子优良的螯合性使铜离子的固着率从87.89%提升至95.35%;热重结果表明,纳米壳聚糖−ACQ复合处理后木材在600℃时的炭残留率为22.03%,处理后木材表面的水接触角达到69.5°。结论采用纳米壳聚糖−ACQ复合处理木材后,铜的抗流失性、热稳定性和疏水性能均得到显著提升。
Copper ions in Alkaline Copper Quaternary(ACQ)preservatives are easy to lose,which threaten the envi-ronment and human health.In this paper,the anti-loss and comprehensive performance of ACQ are improved through bi-ological modification technology.Chitosan was used as the research object and the nano-chitosan solution was pre-pared by ion cross-linking method.ACQ anticorrosive wood was modified by nano-chitosan and the anti-loss and physical properties were investigated.The results show that when the mass ratio of chitosan solution to sodium tripolyphosphate is 5∶1,the diameter of nano-chitosan particles is 376 nm;the fixation rate of copper ions is increased from 87.89%to 95.35%.The residual rate of nano-chitosan modified ACQ anticorrosive wood at 600℃is 22.03%,and the water contact angle is 69.5°.Meanwhile,the anti-loss,thermal stability and hydrophobic properties of nano-chitosan modified ACQ an-ticorrosive wood have been significantly improved.
作者
云虹
韩一琳
刘于莜
沈哲源
YUN Hong;HAN Yi-lin;LIU Yu-you;SHEN Zhe-yuan(College of Materials and Energy,South China Agricultural University,Guangzhou 510642,China)
出处
《包装工程》
CAS
北大核心
2022年第13期61-65,共5页
Packaging Engineering
基金
广东省林业科技创新项目(2022KJCX016)
广东省林学会科技计划(2020-GDFS-KJ-04)。
