共查询到20条相似文献,搜索用时 78 毫秒
1.
对当前化学法在制备空心玻璃微珠的应用进行了综述,分析了国内外空心玻璃微珠的生产现状以及我国当前空心玻璃微珠的研制技术水平;介绍了空心玻璃微珠的特性,并介绍了空心玻璃微珠的一些实际应用,并对空心玻璃微珠制备方法的发展作了预测:干凝胶法是今后的主流方法之一。 相似文献
2.
3.
采用小粒径玻璃微珠(GB)与HDPE熔融共混,研究了玻璃微珠用量及表面处理对复合材料拉伸性能及介电性能的影响。研究结果表明,无论玻璃微珠表面处理与否,GB/HDPE复合材料的拉伸强度和拉伸弹性模量均随着玻璃微珠用量的增加而增大;经过偶联剂KH550和EB151处理的玻璃微珠与HDPE复合后,拉伸强度和拉伸弹性模量有一定的提高。复合材料的介电常数随玻璃微珠用量增加呈现增大的趋势,经过改性的复合材料的介电常数比未经改性的有所增加,而玻璃微珠的添加和界面改性对介电损耗的影响不大。 相似文献
4.
粉煤灰空心玻璃微珠填充高密度聚乙烯的性能 总被引:1,自引:0,他引:1
采用从粉煤灰中提取的空心玻璃微珠,制备不同空心玻璃微珠含量的高密度聚乙烯复合材料,研究空心玻璃微珠对复合材料力学性能和结晶性能的影响.结果表明:随着空心玻璃微珠含量的增加,复合材料的拉伸强度逐步增大,弯曲强度和冲击强度先增大后减小,当空心玻璃微珠质量含量为5%时,弯曲强度和冲击强度达到最大.适量空心玻璃微珠的加入对复合材料的结晶性能有一定程度的改善. 相似文献
5.
6.
通过对比分析国内外研究者在玻璃微珠改性高聚物方面的最新进展,简要概括了玻璃微珠改性高聚物的新方法,展望了玻璃微珠的应用前景。 相似文献
7.
8.
9.
10.
采用化学沉积法使TiO2以纳米粒子的形式包覆于空心玻璃微珠表面,成功制备了TiO2纳米晶/空心玻璃微珠复合填料,并以改性微珠及空心玻璃微珠作为填料制备隔热涂料,对其光反射性能、隔热效果、隔热效果的影响因素进行了研究。结果表明,TiO2在空心玻璃微珠表面包覆效果良好,且经过热处理后空心玻璃微珠破损率很低。以改性微珠作为填料制备的涂料,涂膜对太阳光主要能量波段的光反射性能得到显著提高,其隔热效果较普通外墙涂料和空心玻璃微珠涂料相比有了明显的提高,且改性微珠添加量的多少对隔热温差的影响要大于厚度和白度对隔热温差的影响。 相似文献
11.
Two tougheners, glass beads and carboxyl terminated butadiene acrylonitrile copolymer (CTBN), are used to toughen and stiffen an epoxy thermoset. Rubber‐encapsulated glass beads are used and the hybrid particulate composites containing them are compared with those containing non‐encapsulated glass beads. Within a certain range of composition, the rubber encapsulation is found to change the interactions between glass beads and CTBN particles, resulting in an increase in fracture toughness. The toughening effect is explained by the fact that the cavities of CTBN particles are larger in encapsulation systems than in non‐encapsulation systems. As more CTBN particles are incorporated into glass bead filled epoxies, the cavitation/shear yielding mechanism of CTBN particles replaces the micro‐shear banding mechanism of glass beads as the major micro‐mechanical deformation. Rubber encapsulation seems to enable this transition of major micro‐mechanical deformation to occur at a lower volume fraction of CTBN. 相似文献
12.
介绍了目前校准筛分器具所采用的玻璃微珠粉尘的性能特点,并对玻璃微珠试验粉尘的处理方法进行了着重阐述,主要通过对玻璃微珠试验粉尘处理过程中清洗、浮选、干燥等环节的处理方法进行了详细的论述。 相似文献
13.
杨立宝;陆晓中;陆庆章;孙晓民 《中国塑料》2010,24(4):30-33
考察了玻璃微珠/碳黑用量比对三元乙丙橡胶(EPDM)硫化特性的影响。结果表明,玻璃微珠/炭黑用量比增大时,EPDM胶料的焦烧时间略有延长,最小扭矩和最大扭矩均呈逐步减小的趋势。180 ℃时硫化胶的力学性能优于200 ℃时硫化胶。添加玻璃微珠后,胶料在180 ℃下的正硫化时间缩短近2倍,但200℃下的正硫化时间几乎没有受到任何明显的影响。玻璃微珠会明显减小胶料的硫化温度系数,即添加玻璃微珠后硫化温度对EPDM胶料硫化速度的影响程度将有所减小。 相似文献
14.
新型环氧树脂、固化剂、复合材料及纳米技术进展 总被引:4,自引:2,他引:2
介绍了新型庶糖环氧树脂、液晶环氧树脂、耐温耐湿环氧树脂及其组成物、改性物 ,新型固化剂如多芳环胺类固化剂、潜伏固化促进剂 ,新型复合材料 ,即碳纤维、玻璃微珠、硅充填、石墨环氧复合材料及纳米复合材料最新进展 相似文献
15.
16.
The adhesion phenomena of monodispersed barium sulfate (BaSO4) particles on gelatin-coated glass beads were evaluated using the packed column technique and compared with the same system in the absence of the protein.
Multilayer deposition was observed with the uncoated glass beads at pH 4, 5 and 6, while at pH 9, which is above the isoelectric point (pH ∼ 6) of BaSO4 particles, monolayer deposition took place, even though the BaSO4 particles and glass beads bore the same sign of charge. At pH = 10, no uptake was observed on the glass beads, but the addition of 10-4 mol dm-3 BaCl2 induced multilayer deposition due to the adsorption of the Ba2+ cation on BaSO4 particles, which causes a reversal of their charge to positive.
The formation of multilayers was found to occur over a much wider pH range on the gelatin coated glass beads.
BaSO4 particles deposited in multilayers could not be removed from either glass beads or gelatin-coated glass beads by rinsing the loaded column with solutions of pH 11.5, but could be detached from monolayers on glass beads only. 相似文献
Multilayer deposition was observed with the uncoated glass beads at pH 4, 5 and 6, while at pH 9, which is above the isoelectric point (pH ∼ 6) of BaSO4 particles, monolayer deposition took place, even though the BaSO4 particles and glass beads bore the same sign of charge. At pH = 10, no uptake was observed on the glass beads, but the addition of 10-4 mol dm-3 BaCl2 induced multilayer deposition due to the adsorption of the Ba2+ cation on BaSO4 particles, which causes a reversal of their charge to positive.
The formation of multilayers was found to occur over a much wider pH range on the gelatin coated glass beads.
BaSO4 particles deposited in multilayers could not be removed from either glass beads or gelatin-coated glass beads by rinsing the loaded column with solutions of pH 11.5, but could be detached from monolayers on glass beads only. 相似文献
17.
18.
19.
The adhesion phenomena of monodispersed barium sulfate (BaSO4) particles on gelatin-coated glass beads were evaluated using the packed column technique and compared with the same system in the absence of the protein. Multilayer deposition was observed with the uncoated glass beads at pH 4, 5 and 6, while at pH 9, which is above the isoelectric point (pH ~ 6) of BaSO4 particles, monolayer deposition took place, even though the BaSO4 particles and glass beads bore the same sign of charge. At pH = 10, no uptake was observed on the glass beads, but the addition of 10?4 mol dm?3 BaCl2 induced multilayer deposition due to the adsorption of the Ba2+ cation on BaSO4 particles, which causes a reversal of their charge to positive. The formation of multilayers was found to occur over a much wider pH range on the gelatin coated glass beads. BaSO4 particles deposited in multilayers could not be removed from either glass beads or gelatin-coated glass beads by rinsing the loaded column with solutions of pH 11.5, but could be detached from monolayers on glass beads only. 相似文献