共查询到18条相似文献,搜索用时 93 毫秒
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聚氨酯微球的合成及其表征 总被引:5,自引:0,他引:5
采用反相悬浮聚合法,以甲苯二异氰酸酯、聚醚及三乙醇胺为原料,进行缩聚交联反应,合成了聚氨酯弹性体微球。用扫描电子显微镜等方法表征了微球的形态及溶胀性能,通过BET法测定了微球的比表面积。并通过微球对模型药物异烟肼的释放实验,讨论了微球的化学组成对药物释放性能的影响。 相似文献
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聚合物微球的应用及制备方法的研究 总被引:2,自引:0,他引:2
简述了聚合物微球在分离技术方面的应用概况,分析不同聚合物微球制备方法,如悬浮聚合法、乳液聚合法、分散聚合法、种子聚合法.着重提出反应诱导相分离法制备热固性树脂微球的工艺路线和优缺点。 相似文献
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采用1,4-二氨基蒽醌作为发色体,与异佛尔酮二异氰酸酯反应生成紫色预聚物,与聚乙二醇600通过界面聚合法制备了氨基蒽醌紫色聚氨酯微球。考察了乳化剂种类、用量、乳化速度、发色体用量对微球粒径的影响。结果表明,与聚氧乙烯辛基苯酚醚-10、失水山梨醇单油酸酯聚氧乙烯醚(Tween80)和失水山梨糖醇单油酸酯(Span80)相比,十二烷基苯磺酸钠(SDBS)乳化剂更适合用于聚氨酯球的制备。SDBS质量分数3.5%(以油相为基准)的粒径分布最窄,微球粒径在350 nm左右。微球平均粒径随乳化速度增大而减小,在8000 r/min时粒径分布最集中。发色体在壳层体系中加入量为1 mmol时粒径分布系数最小,平均粒径500 nm。通过SEM和TEM表征,结果显示,聚氨酯微球粒径在500 nm左右,呈表面光滑的球形,内部呈空心结构。氨基蒽醌聚氨酯紫色微球印花织物颜色性能优异,且具有较高色牢度。 相似文献
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以PEA/TDI-100/MOCA作为聚合体系,采用预聚物法合成聚氨酯弹性体,考察了空心微球填充份数与粒径、偶联剂种类与用量等对聚氨酯弹性体性能的影响。结果表明,加入未经改性空心微球的聚氨酯弹性体性能下降,经偶联剂改性空心微球填充聚氨酯能明显提高试样的硬度、撕裂强度力学性能,合成工艺对改性空心微球填充聚氨酯弹性体力学性能影响较大。 相似文献
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采用1,4-二氨基蒽醌作为发色体,与异佛尔酮二异氰酸酯反应生成紫色预聚物,与聚乙二醇600通过界面聚合法制备了氨基蒽醌紫色聚氨酯微球。考察了乳化剂种类、用量、乳化速度、发色体用量对微球粒径的影响。结果表明:与聚氧乙烯辛基苯酚醚-10、失水山梨醇单油酸酯聚氧乙烯醚(Tween80)和失水山梨糖醇单油酸酯(Span80)相比,十二烷基苯磺酸钠(SDBS)乳化剂更适合用于聚氨酯球的制备。SDBS质量分数3.5%(以油相为基准)的粒径分布最窄,微球粒径在350nm左右。微球平均粒径随乳化速度增大而减小,在8000r/min粒径分布最集中。发色体在壳层体系中加入量为1mmol时粒径分布系数最小,平均粒径在500nm。通过SEM和TEM表征,结果显示:聚氨酯微球粒径在500nm左右,表面光滑的球形,内部呈空心结构。氨基蒽醌聚氨酯紫色微球印花织物颜色性能优异,且具有较高色牢度。 相似文献
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综述了功能化高分子微球的合成方法和应用领域。用于功能化高分子微球的一般制备方法可以分为直接制备合成带有功能基团的微球及在现有微球上引人功能基团两种,前者包括乳液聚合、悬浮聚合和分散聚合等,而后者有种子聚合法和微球功能化等方法。并对上述方法的特点进行了总结和比较。此外还对各种微球在化工、生物制药等方面的应用作了介绍. 相似文献
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金属离子印迹聚合物微球的制备研究进展 总被引:4,自引:0,他引:4
对金属离子印迹的原理、发展现状等进行了概述,尤其对印迹聚合物微球制备方法中的种子乳液溶胀聚合、乳液聚合和悬浮聚合、W/O/W多相乳液聚合等方法进行了较详细的介绍。 相似文献
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Copolymers of isobutyl 4,4′‐diphenylmethane dimethacrylate and divinylbenzene in the form of microspheres were obtained. For their preparation, the following techniques of heterogeneous polymerization were used: suspension polymerization, suspension–emulsion polymerization, and precipitation polymerization. Among the obtained microspheres, those synthesized by suspenson–emulsion polymerization were of a size suitable for high‐performance liquid chromatography, whereas the product of suspension polymerization could be used as a packing material for gas chromatography. Their porous structure was studied in details. The influence of the polymerization technique on the particle size and morphology was examined. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 863–870, 2005 相似文献
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Sheng-cai Tian Jian-xin Cao Gui-ming Xie Ming-wei Wang Yong-yong Shi Yun Yi Chun-liang Yang Yi-han Xiao Xian-liang Wei Bei-ming Tian Zi-han Ma 《应用聚合物科学杂志》2021,138(9):49927
Thermally expandable microspheres were synthesized by the suspension polymerization of methyl methacrylate (MMA) and styrene (St) in the presence of paraffin blowing agents. The effect of the monomer composition, the initiator, the blowing agent, the polymerization temperature on the morphology and structure of microspheres were studied. The results showed that AIBN initiated the water phase polymerization of MMA to form secondary polymer particles adsorbed on the surface of the microspheres. MMA diffused from the oil phase to the water phase, which accelerated the phase separation and facilitated the formation of core-shell microspheres. However, LPO could not initiate the water phase polymerization, the phase separation was slow and there was an intermediate state with a porous surface. When the boiling point of the blowing agent was lower than the polymerization temperature, the microspheres were porous and there were a large number of holes on the surface. 相似文献
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Macroporous poly(styrene-divinyl benzene) microspheres with pore size of about 500 nm were prepared by a new method, surfactant reverse micelles swelling method. The macroporous microspheres were prepared by convenient suspension polymerization. The difference from conventional suspension polymerization was that a higher concentration of surfactant was added in the oil phase. The effects of the amount and type of surfactants on the morphology of microspheres were investigated, and the formation mechanism was also discussed. Macropores were formed when the concentration of surfactant was much higher than critical micelle concentration (cmc). It was proposed that a large amount of reverse micelles formed by adding a large amount of surfactant in the oil droplet phase, and the reverse micelles could absorb water from the external aqueous phase. The water in the oil phase formed macropores after polymerization. The method developed in this study was convenient to prepare microspheres with larger pore size than the conventional method such as agglomeration method of nanoparticles. 相似文献