摘要
熟宣加工过程中,施胶剂会对宣纸性能产生显著影响。基于传统拖染施胶工艺,以质量分数为0.5%~2.5%的骨胶水作为施胶剂对生宣进行表面施胶,探讨骨胶用量对宣纸外观、施胶程度、结构和力学性能的影响。实验结果显示:熟宣的D65亮度与骨胶质量分数呈线性负相关,表明骨胶自身呈淡黄色且胶液质量分数的梯度递增是影响熟宣光学性能及外观的主导因素。宣纸施胶前后总色差(ΔE)随骨胶质量分数升高而增加,胶液质量分数≥1.5%时即产生轻微可视色差。骨胶水施胶可有效抑制生宣的吸水性以满足熟宣的实用需求,骨胶质量分数>1.5%后熟宣的疏水特性显著增强。熟宣的厚度和定量随骨胶质量分数升高明显增加,紧度值有所降低,反映了施胶的有效性,其中骨胶的附着是改变宣纸厚度和定量的直接原因,此外纸张在施胶过程中被胶液浸润-自由干燥过程以及骨胶分子吸水膨胀-干燥收缩等多种应力共同参与了宣纸立体结构和尺寸的改变。当骨胶质量分数≤2.0%时,骨胶对宣纸纤维孔隙具有明显填充作用,熟宣随骨胶质量分数增加表现出更高的强度、弹性和柔韧性,这一作用来源于宣纸内部纤维-骨胶体系带来的更多有效结合及更高的键合强度,继续提高骨胶质量分数,宣纸内部孔隙结构的有效填充已达到饱和,施胶对宣纸机械性能的提升作用开始减弱。因此,在熟宣实际加工过程中,骨胶质量分数不宜超过2.0%,即可实现对熟宣纸页物理性能的有效提升和改变。
In the production process of PiMade Xuan paper,the sizing agent had a significant impact on the performance of Xuan paper.Based on the traditional drag-dye sizing technology,the bone glue with the mass fractions of 0.5%-2.5%was used as agent for surface sizing of raw Xuan paper,and the effects of sizing agent dosage on the appearance,sizing degree,structure and mechanical properties of Xuan paper were investigated.The experimental results showed that the D65 brightness of the PiMade Xuan paper was negatively correlated with the mass fraction of bone glue.This indicated that the yellowish color of the bone glue and the increasing gradient of the bone glue mass fraction were the dominant factors affecting the optical properties and appearance of the PiMade Xuan paper.The total color difference(ΔE)of the Xuan paper before and after surface sizing increased with the bone glue mass fraction increase,and a slight visible color difference was produced when the mass fraction of bone glue wa s≥1.5%.Bone glue sizing could effectively inhibit the water absorption of raw Xuan paper to meet the practical needs of PiMade Xuan paper,and the hydrophobic property of PiMade Xuan paper was greatly enhanced after the mass fraction of bone glue>1.5%.The significant increase in thickness and grammage of PiMade Xuan paper was observed with the increase of bone glue mass fraction,and the decrease of its tightness decreased showed the effectiveness of the sizing,which indicated that the coverage of the bone glue directly led to the changes in the thickness and the grammage of Xuan paper.In addition,various stresses such as the immersion of the paper in the bone glue water,free drying,the water absorption expansion and drying contraction of the bone glue molecules also influenced the three-dimensional structure and size of Xuan paper during the sizing process.When the mass fraction of bone glue was less than 2.0%,the bone glue could fill the fiber pores of Xuan paper,in which the PiMade Xuan paper exhibited higher strength,elasticity and flexibility when the mass fraction of bone glue increased.This effect came from the more effective bonding and higher bond strength brought by the fiber-bone glue system within Xuan paper.Continuing to increase the mass fraction of bone glue,the effective filling of the internal pore structure of Xuan paper had reached saturation,and the improvement effect of sizing on the mechanical properties of Xuan paper weakened.Therefore,the mass fraction of bone glue should not exceed 2.0%in the actual processing of PiMade rice paper,which could achieve effective enhancement and change of the physical properties of Xuan paper.
作者
卢郁静
谭静
付小航
黄晶
丁延伟
陈彪
LU Yujing;TAN Jing;FU Xiaohang;HUANG Jing;DING Yanwei;CHEN Biao(Department of History of Science and Scientific Archaeology,University of Science and Technology of China,Hefei 230026,China;Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China)
出处
《林产化学与工业》
CAS
CSCD
北大核心
2023年第3期61-69,共9页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(31200455)
安徽省高等学校省级质量工程项目(2019jyxm0014,2018jyy13)。
关键词
宣纸
骨胶水
色差
施胶度
孔隙结构
抗张性能
Xuan paper
bone glue
color difference
sizing value
porosity structure
tensile properties
