花生壳苯酚液化产物-尿素-甲醛树脂胶黏剂的研究  

Research on Phenol Liquefied Products of Peanut Shell-urea-formaldehyde Resin Adhesive

作　　者：候兴爱 孙丰文 刘龙龙 糜玲 HOU Xing ai;SUN Fengwen;LIU Longlong;MI Ling(College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南京林业大学材料科学与工程学院,江苏南京210037

出　　处：《生物质化学工程》2018年第6期31-37,共7页Biomass Chemical Engineering

基　　金：苏北科技富民强县支撑项目(BN2012090);公益性行业科研专项(201304507);江苏省产学研联合创新基金(BY20111013)

摘　　要：以花生壳苯酚液化产物为原料,制备花生壳苯酚液化产物-尿素-甲醛(PLPUF)树脂胶黏剂。采用正交试验探讨了制备PLPUF树脂胶黏剂的最优配比,以提高其综合性能,结果表明:第一批尿素(U_1)/第二批尿素(U_2)物质的量比、液化产物(PL)/尿素(U_总)物质的量比以及液化产物和尿素总用量(PL+U总)与甲醛(F)物质的量比为3∶1、1∶1.5和1∶1是PLPUF树脂胶黏剂制备的最佳配比;此配比下胶合强度达到了0.83 MPa,含固体量为47.11%,游离甲醛的量为0.05%,以酚醛树脂胶黏剂为标准,PLPUF树脂胶黏剂能满足木材工业树脂的使用要求。PLPUF树脂在贮存过程中黏度逐渐上升,贮存5～15 d胶合强度为0.87～1.15 MPa,22 d后胶合强度降低至0.74 MPa,仍可满足使用条件。PLPUF树脂的FT-IR图中出现酰胺CO和C—N等伸缩振动峰,表明尿素参与反应、改性树脂,而加入固化剂前后树脂的FT-IR吸收峰相同,结合DSC曲线表明固化剂的加入不改变树脂结构,但可以改善PLPUF树脂的固化过程,降低固化温度和固化反应热。The phenol liquefied product of peanut shell was used as raw material to prepare the phenol liquefied product of peanut shell-urea-formaldehyde(PLPUF)resin adhesive.The optimal ratio of PLPUF resin adhesive was studied by orthogonal test,and its comprehensive performance was improved.The results showed that the substance ratios of first batch of urea(U 1)/the second batch of urea(U 2),liquefaction products(PL)/urea(U总),and the total amount of liquefied product and urea(PL+U总)to the amount of formaldehyde(F)were 3∶1,1∶1.5 and 1∶1,respectively,which were the best ratio of PLPUF resin adhesive preparation.Under these conditions,the ratio of the bonding strength reached 0.83 MPa,the solid content was 47.11%,and the free formaldehyde content was 0.05%.With the phenolic resin adhesive as the standard,the PLPUF resin adhesive could meet the requirements of the wood industry resin.The viscosity of PLPUF resin gradually increased as time went on.When the resin was stored for 5 15 days,the bonding strengths were 0.87 1.15 MPa.After 22 days,the bonding strength reduced to 0.74 MPa.Therefore,the conditions of use be met within 22 days.In the FT-IR spectra of PLPUF resin,the stretching vibration peaks such as amide C O and C-N appeared,indicating that urea participated in the reaction and modified resin,and the FT-IR absorption peaks of the resin before and after the addition of the curing agent were the same.Combined with the DSC curve,the addition of the curing agent did not change the structure of PLPUF resin,but could improve the curing process of the PLPUF resin and decrease the curing temperature and reaction heat.

关 键 词：苯酚液化 花生壳 尿素 胶黏剂 

分 类 号：TQ35[化学工程]