Abstract: Lanthanum ricinoleate was obtained by the reaction of lanthanum nitrate and ricinoleic acid, and used as a catalyst on the preparation of water-blown integral skin polyurethane foams (ISFs). The effect of lanthanum ricinoleate on the performance of water-blown integral skin polyurethane foams was investigated by Fourier transform infrared spectrometry (FT-IR), ultraviolet–visible spectroscopy, biomicroscope and electronic universal testing machine. The results indicated that lanthanum ricinoleate could change the foam structure, reduce the foamrelease time, improve the foam strength and surface hardness of the bubbles. The foam showed ideal cell structure with the addition of 0.3 pbw and 0.6 pbw lanthanum ricinoleate.

Key words: lanthanum ricinoleate, catalyst, blend, water-blown foam, foams, gels, abscess

摘要： 采用硝酸镧、蓖麻油酸为原料, 利用复分解法制备了蓖麻油酸镧。以蓖麻油酸镧作为催化剂, 作用于全水发泡聚氨酯自结皮泡沫材料, 考察了蓖麻油酸镧对全水发泡聚氨酯自结皮泡沫材料性能的影响。采用傅里叶红外光谱仪、紫外可见分光光度计、生物显微镜、电子万能试验机等进行表征, 结果表明蓖麻油酸镧对全水发泡聚氨酯自结皮泡沫材料的影响作用明显, 稀土元素的加入使泡沫材料的体系结构发生变化。加入蓖麻油酸镧后可明显缩短泡沫的脱模时间, 改善了泡沫强度和表皮硬度, 对形成稳定良好的泡孔结构有一定的促进作用, 添加0.3份和0.6份的蓖麻油酸镧制取的泡沫泡孔形态较好。

关键词: 蓖麻油酸镧, 催化剂, 混合, 全水发泡, 泡沫, 凝胶, 泡孔