香蕉假茎纤维配抄竹浆纤维制备纸张协同增强机制研究OA

Banana(Musa acuminata)pseudostem fibers were used as the raw material which were prepared through pre-alkali soaking,high-temperature alkaline cooking,and hydrogen peroxide bleaching.Papers were then prepared by blending banana pseudostem fibers with bamboo pulp fibers.The effects of the beating degree and banana pseudostem fibers dosage on the mechanical properties and reinforcement mechanism of paper were investigated.The results demonstrated that the banana pseudostem fibers exhibited good separation.The fiber morphological parameters of banana pseudostem fibers and bamboo pulp fibers were significantly changed with increasing of beating degree(P＜0.05).Their average length ranged from 2.65 to 2.99 mm,average width from 20.6 to 21.4 μm,and average length-to-width ratio from 127.4 to 145.1.Notably,the cellulose content and crystallinity of banana pseudostem fibers were 88.4%and 78.0%,respectively.When banana pseudostem fibers(37 °SR,20%～30%)were mixed with bamboo pulp fibers(40 ° SR),the properties of paper were improved compared with pure bamboo pulp paper.Specifically,the tensile index increased by 3.1%～7.0%,the tear index by 15.4%～30.3%,the burst index by 27.6%～27.8%,and the folding endurance by a factor of 1.3～1.6(P＜0.05).The wettability and air permeability of paper were reduced.The long fibers from banana pseudostem provided flexibility and acted as a skeletal support,while the short fibers from bamboo pulp filled voids and defects to reduce the probability of stress concentration.The"long-short"complementary multi-scale three-dimensional intertwined structure imparted both stiffness and strength to the paper.Furthermore,the overall structure formed by the three-dimensional entanglement of microfibers at the microscopic scale endowed the composite paper with good strength.Banana pseudostem fibers could serve as one of the biomass blending raw materials for high-performance paper,effectively improving the physical strength of bamboo pulp paper,thereby providing a scientific basis for the high-value utilization of agricultural waste resources from banana pseudostems.