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| Study on the Reaction of CMC with Metal Ions and Application of Their Products in Flame Retardant Materials |
| Received:June 06, 2019 |
| DOI：10.11980/j.issn.0254-508X.2019.10.005 |
| Key Words:CMC metal ions chelate flame ratardant |
| Fund Project:广东省援疆科技（特派员）项目 x2qs/B8180070广东省援疆科技（特派员）项目（x2qs/B8180070）。 |
| Author Name | Affiliation | Postcode | | WEI Shipeng | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | TIAN Yingzi | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | PAN Siyuan | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | LU Ran | School of Light Industry and Engineering, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | YUE Huihui | College of Life and Geographic Sciences, Kashgar University, Kashgar, Xinjiang Uygur Autonomous Region, 844006） （*E-mail: yztian@scut.edu.cn | 844006 |
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| Abstract:The CMC was mixed with Cu2+ and Ca2+ to carry out chelation reaction, and using the UV spectrophotometer to determine the absorbance of the products, the best chelation ratio was found. The results showed that the λmax of the chelate created by Cu2+ and CMC was at 205 nm. Because of the reactivity of —COO- was stronger than —OH, —COO- participated the reaction with Cu2+ , but —OH did not. It was speculated that the best chelation ratio was 1. When c(—COO-)/c(Ca2+) was less than 1, the chelate had double absorption peaks. λmax were at 192 nm and 228 nm. It also showed that —COO- and —OH were both involved in the chelating reaction. When c(—COO-)/c(Ca2+) was more than 1, the chelate had a single absorption peak, and λmax was at 192 nm. It was speculated that the best chelating ratio was 2. Using the TG to test the stability of the chelates, its flame retardant mechanism was discussed. The qualitative filter paper immersed with the chelating solution was subjected to vertical burning test, and the limiting oxygen index was measured. The results showed that the percentage of residual mass in thermogravimetric analysis of chelates was higher than 10%, but the percentage of residual mass in qualitative filter paper was only 2.87%. It indicated that the chelates had better thermal stability than qualitative filter paper. Adding the chelates to qualitative filter paper, the paper was difficult to burn. And the qualitative filter paper treated by CMC-Ca had the best flame retardant property. Its limit oxygen index could reach 24.9% and the carbonization length was only 68 mm. |
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