热压初始水分对重载纤维模塑材料性能的影响  

Effects of Initial Moisture Contents on Properties of Overloaded Molded Fiber Materials under Hot Pressing Conditions

作　　者：王全亮[1] 岳金权[2] 肖生苓[1] 陆新宗 WANG Quan-liang;YUE Jin-quan;XIAO Sheng-ling;LU Xin-zong(College of Engineering and Technology, Northeast Forestry University, Harbin 150040, China;College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China)

机构地区：[1]东北林业大学工程技术学院,黑龙江哈尔滨150040 [2]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《高校化学工程学报》2017年第4期951-959,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：中央高校基本科研业务费专项资金(2572016AB69);国家林业公益性行业科研专项(201304506)

摘　　要：分别以杨木高得率浆(HYP)、杨木化学浆(CP)、废纸板浆(WPP)为原料,研究热压初始水分含量(IMC)对重载纤维模塑材料性能的影响。依照Herzberg染色法和造纸原料化学分析的标准比较了纤维原料纤维种类和化学成分的异同,采用XPS、XRD和SEM表征手段系统比较了IMC对重载纤维模塑材料的化学组分、聚集态结构以及微观形貌的影响,同时考察了IMC对重载纤维模塑材料物理力学性能的影响。实验结果表明,零压干燥时,IMC增加导致WPP模塑材料密度与力学强度降低。在热压条件下,IMC的提高,促进胶黏性聚合物的生成,有助于改善HYP和CP模塑材料的结晶指数,利于纤维细胞腔压实和纤维间的紧密交织;IMC的提高,能够显著提高HYP、CP和WPP纤维模塑材料的密度和力学强度,IMC由10%增加到60%时,HYP、CP和WPP模塑材料的密度提高18.6%、23.8%和8.0%,拉伸强度提高119.74%、173.2%和168.3%,弯曲强度提高134.9%、140.2%和125.0%。Poplar high yield pulp(HYP),poplar chemical pulp(CP)and waste paperboard pulp(WPP)wereused to study the effects of initial moisture contents(IMC)on properties of overloaded molded fiber materialsunder hot pressing conditions.Fiber types and chemical compositions were compared according to the Herzbergdyeing method and chemical analysis standards for papermaking raw materials.Effects of IMC on chemicalcomposition,aggregation structure and microstructure of the overloaded molded fiber material under hotpressing were analyzed by XPS,XRD and SEM,and the physical and mechanical properties of the overloadedmolded fiber material prepared at different levels of IMC were also investigated.The results show that theincrease of IMC leads to the decrease of density and mechanical strength of molded WPP materials driedwithout applying mechanical pressure.Under hot-pressing conditions,the increase of IMC promotes theformation of adhesive polymer,which is helpful for the improvement of molded HYP and molded CP materialcrystal indexes,as well as the compaction and intertwining of fibers.The increase of IMC can significantlyimprove the density and mechanical strength of molded HYP,CP and WPP materials.When IMC is increasedfrom10%to60%,the densities of molded HYP,CP and WPP materials increase by18.6%,23.8%and8.0%,thetensile strength increases by119.74%,173.2%and168.3%,and the bending strength increases by134.9%140.2%,125.0%,respectively.

关 键 词：初始水分 纤维模塑 热压 物理力学性能 

分 类 号：TB484.1[一般工业技术—包装工程]