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首页> 外文期刊>Journal of Dispersion Science and Technology >Study of Surface Modification of Nanosize Si _3N _4 with Macromolecular Coupling Agent LMPB-g-GMA in Different Solvents
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Study of Surface Modification of Nanosize Si _3N _4 with Macromolecular Coupling Agent LMPB-g-GMA in Different Solvents

机译：高分子偶联剂LMPB-g-GMA在不同溶剂中对纳米Si _3N _4的表面改性研究

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摘要

A new macromolecular coupling agent, low-molecular-weight polybutadiene liquid rubber (LMPB)-glycidyl methacrylate (GMA), was synthesized using solution polymerization initiated by benzoyl peroxide (BPO). The molecular structure was confirmed by FTIR and NMR. This macromolecular LMPB-GMA was used for surface modification of silicon nitride (Si _3N _4) nanopowder in n-heptane, chloroform, ethyl acetate, and DMF, respectively. LMPB-GMA and modified nano-Si _3N _4 were systematically investigated by FTIR, NMR, TGA, and TEM. The results showed that LMPB-GMA bonded and formed an organic coating layer onto the surface of nanosized Si _3N _4 particles. The polarity of the solvents plays an important role in this process. Strong or weak polar both affect the results. The dosage loading of LMPB-GMA is 12 wt% of nanosized Si _3N _4. Nanosized Si _3N _4 modified in ethyl acetate has better dispersibility and stability than that modified in n-heptane or DMF. TEM pictures also reveal that modified nano-Si _3N _4 possesses good dispersibility.
机译：利用过氧化苯甲酰（BPO）引发的溶液聚合反应合成了一种新的大分子偶联剂，低分子量聚丁二烯液态橡胶（LMPB）-甲基丙烯酸缩水甘油酯（GMA）。分子结构通过FTIR和NMR确认。该大分子LMPB-GMA用于分别在正庚烷，氯仿，乙酸乙酯和DMF中对氮化硅（Si _3N _4）纳米粉进行表面改性。通过FTIR，NMR，TGA和TEM对LMPB-GMA和修饰的纳米Si _3N _4进行了系统研究。结果表明，LMPB-GMA在纳米Si _3N _4纳米粒子的表面上结合并形成有机涂层。溶剂的极性在此过程中起重要作用。强极性或弱极性都会影响结果。 LMPB-GMA的剂量负载为纳米Si _3N _4的12 wt％。乙酸乙酯中改性的纳米Si_3N_4比正庚烷或DMF改性的硅具有更好的分散性和稳定性。 TEM照片还表明，改性的纳米Si _3N _4具有良好的分散性。

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