文献类型：期刊文献

中文题名：有机杂化硅石改性材的制备及性能

英文题名：Preparation and Properties of Organic Hybridization of Wood Silica Modifier

作者：杜浩佳[1] 吕文华[1] 石媛[1] 刘强强[1]

第一作者：杜浩佳

机构：[1]中国林业科学研究院木材工业研究所(中国林业科学研究院林业新技术研究所),北京100091

年份：2022

卷号：50

期号：1

起止页码：111-115

中文期刊名：东北林业大学学报

外文期刊名：Journal of Northeast Forestry University

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2018SZ013)。

语种：中文

中文关键词：人工林杨木;木材物理力学性能;硅石溶液;有机杂化;浸渍改性

外文关键词：Plantation poplar wood;Physical and mechanical properties of wood;Silica solution;Organic hybridization;Impregnation modification

分类号：S781.7

摘要：为了增强无机改性组分与木材组分间的联结作用,分别在硅石溶液化过程中或硅石溶液中加入硅油,制得硅油同步杂化复合硅改性剂(SC、硅油分步杂化复合硅改性剂(SC_(2));分别用有机偶联剂对模数1.0的硅酸钠溶液和模数2.4的硅石溶液进行杂化,制得偶联剂杂化硅酸钠溶液改性剂(HS、偶联剂杂化复合硅改性剂(HS_(2));测试分析改性剂溶液性能及浸渍改性杨木的物理力学性能。结果表明:①硅石溶液化过程中加入硅油同步杂化,不影响二氧化硅转化率,溶液更稳定,模数较小的HS_(1),pH值更大、黏度更小、储存期更长;②有机杂化可进一步提升改性材密度10%以上,复合硅改性杨木的吸药量均达250%以上,质量增加率、密度均提高45%以上;③有机杂化能有效降低硅石溶液改性材的吸湿性,4种复合硅改性材中,SC_(2)改性材的吸湿性最小,HS_(1)比HS_(2)改性材的吸湿性更大,说明改性剂中二氧化硅模数越大,改性材吸湿性越小;④与素材相比,硅石溶液改性材、硅油同步杂化复合硅改性材、硅油分步杂化复合硅改性材、偶联剂杂化的硅酸钠溶液改性材、硅石溶液改性材,抗弯弹性模量分别提高了59.6%、81.0%、79.8%、115.4%、94.6%,抗弯强度分别提高了42.3%、64.2%、68.0%、111.5%、121.5%,顺纹抗压强度分别提高了96.6%、107.0%、99.2%、178.2%、122.6%。说明复合硅改性剂能明显改善杨木的物理力学性能,有机偶联剂比硅油更有效地提升木材性能。
In order to enhance the connection between the inorganic modified component and the wood component,silicone oil was added in the silica solution process or in the silica solution to prepare silicone oil synchronous hybrid composite silicon modifier(SC_(1)),silicone oil step-by-step hybrid composite silicon modifier(SC_(2)).Hybridize the sodium silicate solution with a modulus of 1.0 and a silica solution with a modulus of 2.4 with an organic coupling agent to prepare coupling agent hybrid sodium silicate solution modifier(HS_(1)),coupling agent hybrid composite silicon modifier(HS_(2)).Test and analyze the properties of the modifier solution and the physical and mechanical properties of impregnated modified poplar wood.The results showed:(1)In the process of silica solubilization,adding silicone oil for simultaneous hybridization can not affect the conversion rate of silica,and the solution is more stable,HS_(1) with smaller modulus has higher pH value,lower viscosity and longer storage period;(2)Organic hybridization can further increase the density of modified wood by more than 10%,and the drug absorption of composite silicon modified poplar wood can reach more than 250%,and the percent mass penalty and density can be increased by more than 45%;(3)Organic hybridization can effectively reduce the hygroscopicity of silica solution modified wood.Among the four composite silicon modified wood,SC_(2) modified wood have the lowest hygroscopicity,and HS_(1) is more hygroscopic than HS_(2),indicating in the modification the greater the modulus of silica in the agentis,the less hygroscopicity of the modified materialis;(4)Compared with untreated wood,the MOE of the silica solution modified wood,silicone oil synchronous hybrid composite silicon modified wood,silicone oil stepwise hybrid composite silicon modified wood,coupling agent hybrid sodium silicate solution modified wood and silica solution modified wood increased by 59.6%,81.0%,79.8%,115.4%and 94.6%,the MOR increased by 42.3%,64.2%,68.0%,111.5%,and 121.5%,respectively,and the compression strength parallel to grain increased by 96.6%,107.0%,99.2%,178.2%and 122.6%,respectively.Therefore,the compound silicon modifier can significantly improve the physical and mechanical properties of poplar wood,and the organic coupling agent can enhance the wood properties more effectively than silicone oil.