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| Preparation of Quaternary Ammonium Guar Gum and Its Application in the Reinforcement of Paper Documents |
| Received:April 21, 2022 |
| DOI：10.11980/j.issn.0254-508X.2022.07.008 |
| Key Words:natural polymers quaternary ammonium guar gum paper documents paper reinforcement |
| Fund Project:广州市科技计划项目（项目编号GZDD201808）；广州市岭南文献保护研究中心（202103260039）；华南理工大学制浆造纸国家重点实验室（2020ZR03）。 |
| Author Name | Affiliation | Postcode | | FAN Huiming* | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,Guangdong Province,510641
Guangzhou Lingnan Literature Preservation Research Center, Guangzhou,Guangdong Province,510641 | 510641 | | ZHANG Ke | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,Guangdong Province,510641
Guangzhou Lingnan Literature Preservation Research Center, Guangzhou,Guangdong Province,510641 | 510641 | | ZHOU Ziyin | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,Guangdong Province,510641
Guangzhou Lingnan Literature Preservation Research Center, Guangzhou,Guangdong Province,510641 | 510641 | | LI Fengyu | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,Guangdong Province,510641
Guangzhou Lingnan Literature Preservation Research Center, Guangzhou,Guangdong Province,510641 | 510641 | | MOU Hongyan | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,Guangdong Province,510641
Guangzhou Lingnan Literature Preservation Research Center, Guangzhou,Guangdong Province,510641 | 510641 | | LIU Jianan | State Key Lab of Pulp and Paper Engineering, South China University of Technology, Guangzhou,Guangdong Province,510641
Guangzhou Lingnan Literature Preservation Research Center, Guangzhou,Guangdong Province,510641 | 510641 |
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| Abstract: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 effect. In this study， the natural polymer guar gum was modified by quaternization to obtain quaternary ammonium guar gum with a degree of substitution 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， increased 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. |
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