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研究OCC废纸浆和其造纸沉渣的表面化学性能。结果表明:OCC废纸造纸沉渣样品经预处理后,其细小纤维组分远远高于废纸浆;废纸浆中纤维的数均长度为0.51mm,沉渣中纤维的数均长度为0.39mm;废纸浆纤维Zeta电位为-70.3mV,造纸沉渣纤维Zeta电位为-77.4mV;废纸浆戊聚糖含量为13.81%,造纸沉渣戊聚糖含量为11.55%;废纸浆比造纸沉渣有更大的保水值。将废纸浆与造纸沉渣分别抄片,检测其成纸的物理性能,结果表明:与废纸浆相比,造纸沉渣所抄造出的纸页挺度下降44%,耐破强度下降36.73%,伸长率下降25.56%,裂断长下降50%,撕裂指数下降9.3%。
The surface chemical properties of OCC waste paper and its papermaking sludge were studied. The results showed that the fine fiber fraction of OCC wastepaper was much higher than that of waste paper after pretreatment. The average length of fiber in waste paper was 0.51mm and the average length of fiber in sediment was 0.39mm. The Zeta potential of pulp fiber is -70.3mV, the Zeta potential of papermaking sediment fiber is -77.4mV; the content of pentosan in waste pulp is 13.81%, the content of pentosan in papermaking sludge is 11.55%; the waste paper pulp has greater water retention value than the papermaking sediment . The waste paper pulp and papermaking sediment were copied and the physical properties of the paper were tested. The results showed that compared with the waste paper pulp, papermaking papermaking stiffness decreased by 44%, bursting strength decreased by 36.73%, elongation 25.56% drop in rate, 50% decrease in breaking length, and 9.3% drop in tear index.