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首页> 外文期刊>Cellulose Chemistry and Technology: International Journal for Physics, Chemistry and Technology of Cellulose and Lignin >EFFECT OF RECYCLING ON FUNDAMENTAL PROPERTIES OF HARDWOOD AND WHEAT STRAW PULP FIBERS, AND OF HANDSHEETS MADE THEREOF
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EFFECT OF RECYCLING ON FUNDAMENTAL PROPERTIES OF HARDWOOD AND WHEAT STRAW PULP FIBERS, AND OF HANDSHEETS MADE THEREOF

机译：回收对硬木和小麦秸秆浆纤维的基本性质的影响及其制成的手抄纸

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摘要

The effect of recycling on the fundamental properties of hardwood and wheat straw pulp fibers and of the handsheets made thereof was investigated. Recycling tended to decrease the tensile strength and burst strength of both types of paper sheets, while increasing their tear strength. It clearly had no impact on the fiber length and fiber strength (zero -span tensile strength) of either wheat straw or hardwood pulps, however, the content of fines gradually decreased. The content of fines of hardwood pulp was larger than that of wheat straw pulp both initially and after recycling. The degree of polymerization (DP) of wheat straw and hardwood pulps significantly decreased at early recycling stages. Recycling also led to a decrease of the water retention value (WRV) and loss of hemicelluloses, which resulted in the decrease of recycled paper strength. Consequently, the strength loss of papers made from wheat straw and hardwood pulps depended on the decrease in fiber swelling (hornification) and in hemicelluloses content during recycling.
机译：研究了回收利用对阔叶木、麦草浆纤维及其手抄纸基本性能的影响。回收往往会降低这两种纸张的抗拉强度和耐破强度，同时增加其撕裂强度。显然，它对麦草或阔叶木浆的纤维长度和纤维强度（零跨度拉伸强度）没有影响，但细料含量逐渐减少。阔叶木浆的细粉含量在回收初期和回收后均大于麦草浆。麦草和阔叶木浆的聚合度（DP）在早期回收阶段显著降低。回收还导致保水值（WRV）降低和半纤维素损失，导致再生纸强度降低。因此，由麦草和硬木纸浆制成的纸张的强度损失取决于回收过程中纤维膨胀（角化）和半纤维素含量的减少。

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