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N-羟甲基丙烯酰胺聚合体系注凝成型纳米氮化硅陶瓷 被引量:15

GELCASTING OF SILICON NITRIDE CERAMICS WITH LOW-TOXICITY N-METHYLOL ACRYL AMIDE SYSTEM
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摘要 注凝成型工艺中通常使用的单体丙烯酰胺是一种神经毒素,它阻止了注凝成型工艺的进一步发展,为此,通过实验研究了一种廉价、低毒N-羟甲基丙烯酰胺单体注凝成型体系及该体系形成凝胶时的用量、温度、预混液的pH值等对凝胶时间和凝胶强度的影响。结果表明:N-羟甲基丙烯酰胺聚合体系在无交联剂时仍能形成凝胶;在固相体积分数为40%纳米氮化硅陶瓷粉体的料浆中仅需质量分数的3%的N-羟甲基丙烯酰胺单体即可通过注凝成型得到可用于机械加工的坯体,完全可以代替丙烯酰胺应用于注凝成型工艺中。 The process of gelcasting based on the aerylamide (AM) system is limited to some extent due to AM being a neurotoxin monomer. A low-toxicity gelcasting system based on N-methylol acrylamide (NMAM) was investigated. The effect of the content of monomers, gelcasting temperature and the pH values of pre-mixtures on idle time and gel strength of AM and the NMAM gelcasting systems were studied. The results indicate that gel is formed in the NMAM system without cross-linking agent. 3% (in mass) NMAM was used as monomer in the gelcasting of nanopowder Si3N4 (40% in volume). Under the condition above, the homogeneous green body with machinable strength was obtained, which suggested that NMAM can substitute AM in the gelcasting process.
出处 《硅酸盐学报》 EI CAS CSCD 北大核心 2006年第2期147-151,共5页 Journal of The Chinese Ceramic Society
关键词 N-羟甲基丙烯酰胺 注凝成型 低毒 N-methylol acrylamide gelcasting low-toxicity
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