【摘要】 研究了旧瓦楞纸箱(OCC)浆料多次回用过程中纤维物理强度的变化,并借助扫描电镜(SEM)和傅里叶红外光谱(FT-IR)表面分析手段对回用纤维的表面性能进行了分析。研究表明,回用过程中纸张物理强度性能呈下降趋势。与原纸的裂断长、耐折度、撕裂指数、环压指数和耐破指数相比,2次回用纸分别减少了34.0%、80.0%、42.2%、45.5%、49.6%;而从2次回用纸到5次回用纸时裂断长、撕裂指数、环压指数和耐破指数分别减少了27.3%、37.1%、23.9%、35.3%。在回用过程中OCC浆料纤维的保水值也呈下降趋势,原浆到2次回用浆时减少了12.5%;而从2次回用浆到5次回用浆时减少了20.6%。SEM分析结果显示,随着回用次数的增加,纤维表面变得越来越粗糙,当回用次数达到3次时纤维有裂开的痕迹。FT-IR分析表明,随着OCC浆料回用次数的增加,氢键特征吸收频率发生偏移,表明纤维-纤维间不可逆氢键增加。更多还原

【Abstract】 In this paper,the change of physical strength of recycled OCC fibers was studied,and the surface properties of recycled fiber samples were characterized by SEM and FT-IR techniques.It was shown that the physical strength of recycled fibers dropped sharply with the increase of recycling time.After recycling for the first 2 times,the breaking length,folding strength,tear index,ring crush index and burst index of the recycled fibers was reduced by 34.0%,80.0%,42.2%,45.5%,49.6%,respectively.Up to the fifth-time recycling,a significant change in the physical strength of the recycled fibers happened,correspondingly.Moreover,the water retention value decreased by 12.5% after the first 2 times recycling,also decreased by 20.6% from the second to the fifth-time recycling of OCC fibers.It was observed by SEM that the surface of the recycled fibers seemed to exhibit rougher and rougher,even appeared the trace of crack,which was probably due to the fiber’s hornification in the recycling process.According to the spectra of FT-IR,it was inferred that with the recycling time increasing,the hydrogen bond of fiber-fiber increased which promoted the decay of fiber surface strength.更多还原