Synthesis of CoO@CNTs Hybrid <italic style="font-style: italic">via</italic> Catalytic Carbonization of Waste Ethylene-Vinyl Acetate Copolymer and Its Effect on Flame Retardancy of Polycarbonate

Qi Zhang; Yuan-meng Lou; Zhao-tian Ba; Sai-sai Xu; Jun-jie Ye; Jia-bao Qin; Xin Wen; Jie Liu; Tao Tang

doi:10.11777/j.issn1000-3304.2026.26110

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Synthesis of CoO@CNTs Hybrid via Catalytic Carbonization of Waste Ethylene-Vinyl Acetate Copolymer and Its Effect on Flame Retardancy of Polycarbonate

更新时间：2026-07-02

- Synthesis of CoO@CNTs Hybrid via Catalytic Carbonization of Waste Ethylene-Vinyl Acetate Copolymer and Its Effect on Flame Retardancy of Polycarbonate
- Acta Polymerica Sinica Pages: 1-12(2026)
- 作者机构：
  
  1.青岛科技大学，材料科学与工程学院山东省高性能电缆料重点实验室青岛 266042
  2.青岛科技大学，高性能有机光学聚合物与先进制造技术全国重点实验室青岛 266042
  3.中国科学院长春应用化学研究所，高分子科学与技术全国重点实验室长春 130022
- 作者简介：
  
  Xin Wen, E-mail: hgwenxin@qust.edu.cn
  Tao Tang, E-mail: ttang@ciac.ac.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26110
  CLC：
- CSTR：32057.14.GFZXB.2026.7615
- Received：07 April 2026，
  
  Accepted：30 April 2026，
  
  Online First：28 June 2026，
- 稿件说明：
移动端阅览
张琦, 娄元猛, 巴昭天, 胥赛赛, 叶俊杰, 秦嘉保, 闻新, 刘杰, 唐涛. 催化碳化废弃乙烯-醋酸乙烯共聚物合成CoO@CNTs杂化物及其阻燃聚碳酸酯. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26110.

Zhang, Q.; Lou, Y. M.; Ba, Z. T.; Xu, S. S.; Ye, J. J.; Qin, J. B.; Wen, X.; Liu, J.; Tang, T. Synthesis of CoO@CNTs hybrid via catalytic carbonization of waste ethylene-vinyl acetate copolymer and its effect on flame retardancy of polycarbonate. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26110.
张琦, 娄元猛, 巴昭天, 胥赛赛, 叶俊杰, 秦嘉保, 闻新, 刘杰, 唐涛. 催化碳化废弃乙烯-醋酸乙烯共聚物合成CoO@CNTs杂化物及其阻燃聚碳酸酯. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26110. DOI： CSTR： 32057.14.GFZXB.2026.7615.

Zhang, Q.; Lou, Y. M.; Ba, Z. T.; Xu, S. S.; Ye, J. J.; Qin, J. B.; Wen, X.; Liu, J.; Tang, T. Synthesis of CoO@CNTs hybrid via catalytic carbonization of waste ethylene-vinyl acetate copolymer and its effect on flame retardancy of polycarbonate. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26110. DOI： CSTR： 32057.14.GFZXB.2026.7615.

摘要

为缓解废弃高分子引发的环境污染与生态安全问题，开发绿色高效的回收再利用策略具有重要意义. 本研究以废旧太阳能光伏板中的乙烯-醋酸乙烯共聚物(WEVA)为碳源，单组分氯化钴(CoCl

)为催化剂，通过一步催化碳化法制备出氧化亚钴@碳纳米管杂化物(CoO@CNTs)，并将其作为功能填料应用于聚碳酸酯(PC)的阻燃改性. 研究结果表明，CoCl

可以高效催化WEVA碳化，当催化剂含量为25 g/100g WEVA时，CoO@CNTs的产率可达44.3 g/100g WEVA；同时观察到中空的多壁碳纳米管形貌. 制备的CoO@CNTs在PC复合材料展现出优异的阻燃与抑烟性能，添加量为3 wt%时，其极限氧指数(LOI)达到29.3%，UL-94垂直燃烧达到V0等级，锥形量热仪测试中热释放峰值(PHRR)较纯PC降低52.8%，烟释放峰值(PSPR)和CO产生峰值(PCOP)分别降低66.1%和66.3%. 同时，与商业化的CNTs相比，CoO@CNTs表现出更佳的阻燃效果. 阻燃机理主要归结为CoO和CNTs的协同作用：CoO可催化PC降解产物碳化，增加凝聚相残炭量；CNTs可作为骨架增强炭层的支持强度，从而构筑致密炭层，有效阻隔抑制热量传递、氧气扩散和可燃气体释放. 本研究为废弃高分子的高值化回收提供了绿色经济的新思路，也为功能高分子复合材料的制备提供了新型高效杂化阻燃剂.

Abstract

To alleviate the environmental pollution and ecological safety issues caused by waste polymers

it is of great importance to develop green and efficient recycling and reuse strategies. In this work

cobalt monoxide@carbon nanotube hybrids (CoO@CNTs) were synthesized

via

a one-step catalytic carbonization method. The carbon source was waste ethylene-vinyl acetate copolymer (WEVA) recovered from decommissioned solar photovoltaic panels

and single-component cobalt chloride (CoCl

) was employed as the catalyst. The as-synthesized hybrids were then applied as functional fillers to prepare flame-retardant polycarbonate (PC) composites. The results showed that CoCl

could efficiently catalyze the carbonization of WEVA. When the catalyst loading was 25 g/100g WEVA

the yield of CoO@CNTs reached 44.3 g/100g WEVA

and a hollow multi-walled carbon nanotube morphology was clearly observed. Moreover

the CoO@CNTs endowed PC composites with excellent flame retardancy and smoke-suppression properties. With 3 wt% filler loading

the limiting oxygen index (LOI) of PC composite reached 29.3%

and it achieved V0 rating in UL-94 vertical burning test. In cone calorimeter tests

the peak heat release rate (PHRR) was reduced by 52.8% compared with that of neat PC

while the peak smoke production rate (PSPR) and peak CO production (PCOP) were decreased by 66.1% and 66.3%

respectively. Meanwhile

CoO@CNTs

exhibited better flame-retardant efficiency than commercial CNTs. The flame-retardant mechanism was mainly attributed to the synergistic effect of CoO and CNTs: on one hand

CoO could catalyze the carbonization of PC degradation products to increase residual char amount in condensed phase; on the other hand

CNTs acted as a framework to strengthen the strength of char layer

thereby constructing a compact barrier that could effectively inhibit heat transfer

oxygen diffusion and flammable gas release. This work provided a green and economical route for the high-value recycling of waste polymers

and also offered a novel and highly efficient flame-retardant hybrid for preparing functional polymer composites.

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references

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Synthesis of CoO@CNTs Hybrid via Catalytic Carbonization of Waste Ethylene-Vinyl Acetate Copolymer and Its Effect on Flame Retardancy of Polycarbonate

DOI：10.11777/j.issn1000-3304.2026.26110

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