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| Effects of NaOH treatment on degradation of Camellia oleifera seed protein and its adhesive properties |
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| DOI： |
| KeyWord:Camellia oleifera seed protein NaOH hydrolysis degree viscosity reactivity bonding performance |
| FundProject:贵州省科技厅项目（黔科合支撑\[2019\]2325，黔科合基础-ZK\[2021\]一般162）；国家自然科学基金项目（32160348）；贵州大学培育项目（\[2019\]37）；凯里学院“博士教授服务团”专项（BJFWT201906）；贵州省油茶工程技术研究中心（\[2018\]5252） |
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| Abstract: |
| In order to promote the development of Camellia oleifera industry and develop a new protein based adhesive, Camellia oleifera seed protein (protein content 36%, fiber content 15%) was degraded by NaOH, and then mixed with cross-linking agent and applied to hot pressing of plywood as adhesive. The effects of the amount of NaOH on the hydrolysis degree of Camellia oleifera seed protein, the viscosity and reaction ability with formaldehyde of the degradation solution and the bonding performance of the adhesive were investigated. The Camellia oleifera seed protein before and after degradation was characterized by in frared spectroscopy. The results showed that NaOH could effectively degrade Camellia oleifera seed protein and produce active groups and active sites. With the increase of NaOH amount, the hydrolysis degree and the reaction ability with formaldehyde increased rapidly at first and then increased slowly, and the viscosity increased rapidly at first and then decreased sharply and then decreased slowly, and the wet bonding strength of Camellia oleifera seed protein-based adhesive increased first and then decreased. When the amount of NaOH was 7%, the degradation solution of Camellia oleifera seed protein had higher reactivity, higher cohesive strength, better operation property, and better bonding performance. |
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