文献类型：期刊文献

中文题名：CaCO_(3)矿化装饰薄木的制备及其阻燃性能

英文题名：Preparation and flame-retardant properties of CaCO_(3)-mineralized decorative veneers

作者：何叶[1] 卢钰鑫[1] 刘琼瑶[1] 屈熙[1] 方露[1] 唐启恒[2]

第一作者：何叶

机构：[1]南京林业大学家居与工业设计学院,南京210037;[2]中国林业科学研究院木材工业研究所,北京100091

年份：2024

卷号：9

期号：2

起止页码：47-54

中文期刊名：林业工程学报

外文期刊名：Journal of Forestry Engineering

收录：CSTPCD;;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD_E2023_2024】；

基金：浙江省博士后科研项目择优资助(ZJ2022139)。

语种：中文

中文关键词：装饰薄木;阻燃改性;原位生成法;矿化木材

外文关键词：decorative veneer;flame retardant modification;in situ generation method;mineralized wood

分类号：TS653.2

摘要：装饰薄木的易燃性限制了其在家具饰面、室内装饰等领域的应用。为了提升装饰薄木的阻燃性能,采用仿生呼吸法将氯化钙(CaCl_(2))溶液与碳酸氢钠(NaHCO_(3))溶液分段浸渍于薄木中以制备矿化装饰薄木。通过傅里叶变换红外光谱(FT-IR)和环境扫描电镜(ESEM)对矿化产物进行了分析,并且采用宏观燃烧试验、热重分析法(TG)与锥形量热仪(CONE),对改性处理后薄木的阻燃性能进行评价。结果表明:矿化处理后薄木表面与内部均原位生成了方解石型CaCO_(3),且CaCO_(3)的生成量随着浸渍溶液浓度增大而增加。附着于薄木表面的CaCO3具有防火屏障功能,当浸渍溶液浓度由0.2 mol/L增加到1.0 mol/L及以上时,矿化薄木的着火时间得到明显延长。CaCO_(3)能催化纤维素热解,有利于产生稳定焦炭,TG结果显示,当浸渍溶液浓度为1.8 mol/L时,矿化薄木残炭率为28.05%,与未处理薄木相比提升了81.55%,阻燃效果最佳。CONE测试结果显示:与未处理薄木相比矿化薄木的热释放速率、有效燃烧热大幅降低,阻燃性能显著提升;但是矿化薄木的横向抗拉强度随浸渍溶液浓度增大而减小,对后续使用存在影响。综合考虑认为采用1.0 mol/L浓度的浸渍溶液对薄木进行矿化处理,可以使其获得良好的阻燃性能,同时保持一定的横向抗拉强度。
The flammability of decorative veneer restricts its application in furniture,interior decoration,and other fields.To enhance the flame retardancy of decorative veneer,this study implemented a biomimetic mineralization approach by sequentially impregnating veneer with calcium chloride(CaCl_(2))and sodium bicarbonate(NaHCO_(3))solutions to in situ generate calcium carbonate(CaCO_(3)).The flame retardancy of the modified veneer was characterized by the macro combustion testing,thermogravimetric analysis(TG)coupled with cone calorimetry(CONE),with the mineralization products analyzed via the Fourier transform infrared spectroscopy(FT-IR)and environmental scanning electron microscopy(ESEM).The results revealed that CaCl_(2) and NaHCO_(3) solutions produced calcite CaCO_(3) on the surface and interior of veneer,and the amount of CaCO_(3) produced increased with the increase of impregnation solution concentrations.The surface CaCO_(3) layer acted as a physical barrier against fire.As the concentration increased from 0.2 mol/L to 1.0 mol/L and above,the combustion time of the mineralized veneer was markedly prolonged.The CaCO_(3) also catalyzed pyrolysis of cellulose to favor char formation.TG results indicated that,at 1.8 mol/L concentration,the residual char of mineralized veneer reached 28.05%,counting an 81.55%improvement compared to the untreated veneer.This optimal concentration achieved the greatest flame retardancy,demonstrating the efficacy of biomimetic mineralization for enhancing veneer fire safety.However,the transverse tensile strength of the mineralized veneer declined with the increase in impregnation solution concentration,which could compromise subsequent utility.An optimal concentration of 1.0 mol/L was determined to impart adequate flame retardance whilst preserving reasonable transverse tensile performance of the mineralized veneer.The CONE test results demonstrated that the mineralized veneer exhibited remarkably decreased heat release rate and effective heat of combustion compared to untreated veneer,indicating significantly enhanced flame retardancy.However,the transverse tensile strength of mineralized veneer was adversely affected,as evidenced by its gradual decline with increasing concentration of the impregnation solution,which could compromise subsequent serviceability.This study thereby recommends mineralizing veneer using an optimal concentration of 1.0 mol/L for the impregnation solution to attain adequate flame retardance whilst preserving transverse tensile performance to a certain extent.