Yongwei ZHU
,
Xiangqian SHEN
,
Zhijing FENG
,
Xiangyang XU
,
Baichun WANG
材料科学技术（英文）
Several factors affecting the ζ-potential of nanodiamonds were studied. The Chemical Mechanical Modification (CMM) of surface, different surfactants and its dosage, and inorganic ions on the ζ-potential of nanodiamond sample L were studied using ZETASIZER3000HS and Nexus470. Results show that the ζ-potential changes with its parameters of detonation synthesis and purification. Results also suggest that CMM and subsequent treatments employed can alter apparently the ζ-potential and that some anionic surfactants increase the absolute value of the ζ-potential in the alkaline surrounding.
关键词:
Nanodiamond
,
null
,
null
,
null
陈清
,
陈照峰
,
李承东
,
陈兴开
,
周介明
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2014.02.006
研究了切棉方式、玻璃纤维长度、分散剂种类和含量对玻璃纤维浆料分散性的影响.结果表明:切棉后的浆料分散程度明显高于未切棉的;浆料中所含纤维成团所占面积百分数由72.6％降到2.4％.长方形棉块经打浆后形成的浆料纤维较正方形的更为分散.玻璃纤维越长则越难分散,适宜的纤维分散长度为10～12 mm.浆料所含纤维为0.2wt％时,羟乙基纤维素、羟丙基甲基纤维素、六偏磷酸钠的最佳加入量分别为0.008wt％、0.012wt％和0.04wt％,所对应的浆料吸光度分别为0.344、0.703和0.663 A.沉降实验显示添加六偏磷酸钠的浆料分散性最好,浆料沉降高度最低、沉降速率最慢,羟丙基甲基纤维素次之,羟乙基纤维素最差.
关键词:
分散剂
,
切棉
,
玻璃纤维
,
浆料
,
分散性
徐洪敏
,
郑威
,
王小兵
,
齐燕燕
,
王宝春
宇航材料工艺
doi:10.3969/j.issn.1007-2330.2015.03.010
根据真空辅助RTM工艺性特点,确定粉体填料改性树脂基复合材料工艺方法.将粉体填料分散于乙酸乙酯溶液中,并添加分散剂、黏结剂,并确定粉体填料与分散剂的质量比为1∶0.5,制备一种分散效果较好的粉体填料悬浮液,将粉体填料定量喷涂增强纤维,并观察粉体填料喷涂量与喷涂速度之间成正比例关系.观察改性纤维SEM图,粉体填料能较好的黏附在增强纤维表面,且分布较均匀;改性后纤维由于粉体填料的涂覆效果,纤维丝断裂强力较无喷涂纤维丝下降10％,在一定条件下并不影响纤维增强复合材料性能.
关键词:
粉体填料
,
悬浮液
,
喷涂
,
增强纤维
