漆酶-ABTS介体体系活化木质素磺酸铵制备环保型纤维板及其性能表征  

Performances of Eco-friendly Fiberboard Prepared by Laccase-mediator System Modified Ammonium Lignosulfonate

作　　者：杜文鑫[1] 张永明[1] 郭明辉[1] 

机构地区：[1]生物质材料科学与技术教育部重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2017年第2期75-80,84,共7页Journal of Northeast Forestry University

基　　金：林业公益性行业科研专项资助(201504501-1)

摘　　要：以木纤维为基体,漆酶-ABTS介体体系活化后的木质素磺酸铵(Lac+ABTS/ML)为黏结剂制备环保型纤维板(Lac+ABTS/MLF),利用傅里叶变换红外光谱(FT-IR)、紫外可见分光光度计(UV)、X射线衍射仪(XRD)和热重分析仪(TGA)分别分析材料的化学组分、酚羟基质量分数、结晶度和热稳定性;并通过单因素试验对漆酶用量、介体用量和活化时间3个工艺参数进行优化。结果表明,最佳的工艺参数为漆酶添加量为20 U/g、介体添加量为0.3%和活化时间为60 min,在此工艺下制备的纤维板的物理力学性能均已达到GB/T 11718—2009中干燥状态下使用的普通型中密度纤维板性能要求。The ecofriendly fiberboard was manufactured by wood fiber as raw material and the ammonium lignosulfonate modifiedby laccaseABTS mediator system （ Lac＋ABTS / ML）as wood adhesives. The Lac＋ABTS / ML,MDF and the fractures inthe bonded joints were analyzed via Fourier transform infrared spectroscopy （ FTIR） ,Xray diffraction （ XRD） ,UVVisspectrophotometer （ UV）and thermal gravimetric analyzer （ TGA） ,and the optimal modifying parameters were measuredby orthogonal test. The optimal modifying parameters were 20 U/ g of laccase dosage,0.3% of mediator dosage,60 min ofactivation time,and the performance of MDF using Lac＋ABTS/ ML as adhesives improved significantly than that of MDF usingammonium lignosulfonate modified by laccase （ Lac＋ABTS / MLF）only as adhesives.

关 键 词：漆酶介体体系 木质素磺酸铵 环保型纤维板 工艺参数 物理力学性能 

分 类 号：TS653.6[轻工技术与工程]