Preparation of Quaternary Ammonium Guar Gum and Its Application in the Reinforcement of Paper Documents [季铵型瓜尔胶的制备及在纸质文献加固中的应用]

作者：Fan H.; Zhang K.; Zhou Z.; Li F.; Mou H.; Liu J.^*

来源：China Pulp and Paper, 2022, 41(7): 54-59.

DOI：10.11980/j.issn.0254-508X.2022.07.008

• natural polymers
• paper documents
• paper reinforcement
• quaternary ammonium guar gum

Paper documents are the treasures of human civilization，and a large number of fragile paper documents need to be reinforced and protected. Therefore，it is urgent to explore a material with good compatibility with paper fibers，easy operation and significant reinforcement ef? fect. In this study，the natural polymer guar gum was modified by quaternization to obtain quaternary ammonium guar gum with a degree of sub? stitution of 0. 137. The product had better solubility and stability，and was applied to the reinforcement of paper documents. The results showed that，compared with untreated paper，the tensile strength of the strengthened paper increased from 2. 64 kN/m to 3. 16 kN/m，folding times from 7 times to 13 times，tearing strength from 161. 5 mN to 193. 5 mN and zero distance tensile strength from 65. 0 kN/m to 72. 8 kN/m，in? creased by 19. 7%，85. 7%，19. 8%，12. 0%，respectively. The chromatic aberration was 1. 31 after aging，which did not negatively affect the color of paper and handwriting，demonstrating that quaternary ammonium guar gum had a certain application prospect in the reinforcement of paper documents.

• 单位
  华南理工大学; 制浆造纸工程国家重点实验室