The poplar alkaline hydrogen peroxide mechanical pulp (APMP) with the lignin content of 24.63 % was used as raw material, which with lignin content of 10.04 %, 6.33 %, 3.82 %, and 1.14 % were obtained by the acid sodium chlorite method for 1–4 hours respectively. Then, different lignin content APMP were micro-nano processing treated with acidolysis (6.5 M, 9.8 M) or ultra-granular grinding respectively. Afterwards, poplar bleached chemical pulp (BCP) was prepared micro-nano cellulose under the same conditions as the APMP. Then, compared the data of the particle size, specific surface area, fiber morphology and zeta potential of suspensions between micro-nano cellulose products. The results show that the presence of a small amount of lignin (1–4 %) in APMP does not affect the preparation of different scales nano cellulose under different acid concentration conditions. When the lignin content is reduced to below 2 %, the acidolysis is more uniform, stable, and well-dispersed compared to BCP products; when the APMP is processed by the ultra-granular grinding, the higher lignin content, the more obvious cutting effect in the fiber length direction. The characteristics and feasibility of the preparation of micro-nano cellulose by the acidolysis and ultra-granular grinding using APMP with varying degrees of delignification are compared.

中文翻译：

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木质素含量和酸浓度对碱性过氧化氢机械浆制备含木质素纳米纤维的影响

以木质素含量为24.63％的杨木碱性过氧化氢机械浆（APMP）为原料，通过亚氯酸钠法制得的木质素含量分别为10.04％，6.33％，3.82％和1.14％。分别为–4小时。然后，分别对不同木质素含量的APMP进行酸解（6.5 M，9.8 M）或超细颗粒研磨，进行微纳处理。然后，在与APMP相同的条件下，制备了杨木漂白化学纸浆（BCP）。然后，比较了微纳米纤维素产物之间的悬浮液的粒度，比表面积，纤维形态和ζ电势的数据。结果表明，APMP中少量木质素（1-4％）的存在不会影响在不同酸浓度条件下制备不同规模的纳米纤维素。当木质素含量降低到2％以下时，与BCP产品相比，酸解作用更加均匀，稳定和分散。当APMP通过超细颗粒研磨加工时，木质素含量越高，在纤维长度方向上的切割效果越明显。比较了采用不同去木质度的APMP进行酸解和超细磨制备微纳米纤维素的特性和可行性。当APMP通过超细颗粒研磨加工时，木质素含量越高，在纤维长度方向上的切割效果越明显。比较了采用不同去木质度的APMP进行酸解和超细磨制备微纳米纤维素的特性和可行性。当APMP通过超细颗粒研磨加工时，木质素含量越高，在纤维长度方向上的切割效果越明显。比较了采用不同去木质度的APMP进行酸解和超细磨制备微纳米纤维素的特性和可行性。