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| Preparation of Cationic Soy Protein Isolate and Its Application as Wet End Additive in Papermaking |
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| DOI：10.11981/j.issn.1000-6842.2016.02.18 |
| Key Words:soy protein isolate； cationic modification； papermaking wet end system； sheet properties |
| Fund Project:“十二五”国家科技支撑计划重点项目(2013BAC01B03)。 |
| Author Name | Affiliation | | 袁明昆1 | 1.大连工业大学轻工与化学工程学院,辽宁大连,116034 | | 丁子栋2 | 2.大连市供水有限公司,辽宁大连,116021 | | 周景辉1，* | 1.大连工业大学轻工与化学工程学院,辽宁大连,116034 | | 郭延柱1 | 1.大连工业大学轻工与化学工程学院,辽宁大连,116034 | | 韩 颖1 | 1.大连工业大学轻工与化学工程学院,辽宁大连,116034 |
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| Abstract: |
| The optimum conditions for synthesis of cationic soy protein isolate (CSPI) were studied and they were found as follows: reaction temperature 70℃, reaction time 4 h, reaction system pH value 10.0, molar ratio of soy protein isolate (SPI) and cationic reagent (EPTA) 1∶1.1. The chemical structure and physical property of CSPI were analyzed by FT-IR and TGA, respectively. The results revealed that EPTA was successfully grafted onto the amino groups of SPI. The good thermal stability of CSPI enabled it to be used as papermaking additive. The pulp drainage, fines retention and sheet strength were improved significantly when CSPI was used as wet end additive. The microstructure of the sheet was analyzed by SEM. It was found that the fiber bonding was more tightly. |
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