METHOD TO PRODUCE COMPOSITE-ENHANCED MARKET PULP AND PAPER

An improved market pulp and process for making the same by adding a composite material are described. The composite material includes cellulose nanocrystals， cellulose nanofibers， or another high aspect ratio， high surface area cellulose material (or a starch， or both) and a crosslinking compound that crosslinks a portion of the surface hydroxyl groups to form a 3-D matrix. Adding the composite material to market pulp has been shown to improve the strength of twice-dried paper products， made from such an enhanced market pulp. By crosslinking a portion of the surface hydroxyl groups in the market pulp to form a 3-D matrix， a first drying step may be accomplished without loss of benefits afforded when the market pulp is later re-pulped to make a paper product. An improved market pulp and process for making the same by adding a composite material are described. The composite material includes cellulose nanocrystals， cellulose nanofibers， or another high aspect ratio， high surface area cellulose material (or a starch， or both) and a crosslinking compound that crosslinks a portion of the surface hydroxyl groups to form a 3-D matrix. Adding the composite material to market pulp has been shown to improve the strength of twice-dried paper products， made from such an enhanced market pulp. By crosslinking a portion of the surface hydroxyl groups in the market pulp to form a 3-D matrix， a first drying step may be accomplished without loss of benefits afforded when the market pulp is later re-pulped to make a paper product.

本发明公开了一种改良的商品浆（market pulp）及其制备方法，该方法通过向其中添加复合材料实现。所述复合材料包含纤维素纳米晶（cellulose nanocrystals）、纤维素纳米纤维（cellulose nanofibers），或其他具备高长径比、高比表面积的纤维素材料（或淀粉，或二者兼具），以及可对部分表面羟基进行交联以形成三维基质的交联化合物。已有研究证实，将该复合材料添加至商品浆中，可有效提升由该增强型商品浆制备的二次干燥纸制品的强度。通过对商品浆中的部分表面羟基进行交联以形成三维基质，即便执行首次干燥步骤，后续将该商品浆再制浆制备纸制品时，仍不会损失原有的性能增益。本发明公开了一种改良的商品浆（market pulp）及其制备方法，该方法通过向其中添加复合材料实现。所述复合材料包含纤维素纳米晶（cellulose nanocrystals）、纤维素纳米纤维（cellulose nanofibers），或其他具备高长径比、高比表面积的纤维素材料（或淀粉，或二者兼具），以及可对部分表面羟基进行交联以形成三维基质的交联化合物。已有研究证实，将该复合材料添加至商品浆中，可有效提升由该增强型商品浆制备的二次干燥纸制品的强度。通过对商品浆中的部分表面羟基进行交联以形成三维基质，即便执行首次干燥步骤，后续将该商品浆再制浆制备纸制品时，仍不会损失原有的性能增益。