环氧大豆油丙烯酸酯浸渍改性速生木材的性能及改性机理  

Performance and Mechanism of Acrylated Epoxidized Soybean Oil Impregnation Modified Fast-Growing Wood

作　　者：李志斌 应俏 袁新兵 唐辉[1] 罗大伟 Zhibin Li;Qiao Ying;Xinbing Yuan;Hui Tang;Dawei Luo(Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650504,China;College of Agriculture and Biological Engineering,Taizhou Vocational College of Science&Technology,Taizhou 318020,China;Ochemate Advanced Material Technology,Huzhou 313000,China;Natural Science Office,Louangnamtha Teacher Training College,Louangnamtha 03000,Laos)

机构地区：[1]昆明理工大学化学工程学院,云南昆明650504 [2]台州科技职业学院农业与生物工程学院,浙江台州318020 [3]欧美新材料有限公司,浙江湖州313000 [4]老挝南塔师范学院自然科学部,南塔南塔03000

出　　处：《高分子材料科学与工程》2022年第11期49-57,共9页Polymer Materials Science & Engineering

基　　金：国家自然科学基金地区基金资助项目(51167008);校企合作科技基金资助项目(kkk0201705038)。

摘　　要：为提高速生木材的综合使用性能,以杉木、樟子松和杨木为研究对象,采用经活性单体稀释的环氧大豆油丙烯酸酯(AESO)对其进行化学浸渍改性,比对不同工艺条件对改性木材综合性能的提升效果。通过傅里叶变换红外光谱对合成的AESO进行结构表征,利用X射线光电子能谱仪(XPS)和扫描电子显微镜(SEM)分析AESO浸渍改性木材的微观机理。结果表明,以苯乙烯(St)为稀释剂,按m(AESO):m(St)=3:1配制的混合体系浸渍速生材并在70℃固化6 h,3种木材的综合性能均获得明显提升。改性杉木的性能提升最为显著,浸渍率为166.1%,固化增重率为157.0%,7 d抗吸水率达到了86.1%,顺纹抗压强度增加了87.2%。XPS分析结果表明,AESO浸渍体系成功渗透到木材内部,渗透方式以横向渗透为主。SEM观察到的微观形貌变化说明,改性后木材的微观结构未遭到破坏,浸渍体系填充、黏附到木材结构组织的细胞壁上并交联固化,细胞壁上的纹孔口被闭塞,极大地提高了速生材的抗吸水性和力学强度。At present,the limitation of bio-based modifiers is that they can only improve some single aspects of the properties for fast-growing wood.To improve the comprehensive applied performance of fast growing wood,Chinese fir,pinus sylvestris,and poplar were modified with acrylated epoxidized soybean oil(AESO)diluted by active monomer,and the comprehensive performance of modified wood under different processing conditions were compared.The synthesized AESO was characterized by FT-IR.Moreover,the surface composition and microstructure of AESO impregnated modified wood were investigated by X-ray photoelectron spectroscopy(XPS)and SEM,and the modification mechanism was further analyzed.The results show that the comprehensive properties of the three kinds of wood are improved by impregnating the fast growing wood and curing it at 70℃ for 6 h using a mixed system with m(AESO):m(St)=3:1,styrene(St)as diluent.The properties of modified Chinese fir are improved most significantly,the impregnation yield is 166.1%,the curing mass gain percent is 157.0%,the anti-water absorption rate of 7 d is 86.1%,and the compressive strength is increased by 87.2%.XPS analysis show that the AESO impregnation system successfully penetrates into the interior of the wood,mainly through transverse penetration.The changes of micromorphology observed by SEM indicate that the microscopic structure of the wood after modification has not been destroyed,and the impregnation system filled and adhered to the cell walls of various structural tissues of wood and cured.Pits on the cell wall are blocked,which greatly improve the anti-water absorption resistance and mechanical strength of fast-growing wood.

关 键 词：速生木材 环氧大豆油丙烯酸酯 浸渍改性 抗吸水性 

分 类 号：TS652[轻工技术与工程]