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林柳兰 《武汉理工大学学报(材料科学英文版)》2009,24(2):174-180
A novel method of designing and preparing bone tissue engineering scaffolds with controllable porous structure of both macro
channels and micro pores was proposed. The CAD software UG NX3.0 was used to design the macro channels’ shape, size and distribution.
By integrating rapid prototyping and traditional porogen technique, the macro channels and micro pores were formed respectively.
The size, shape and quantity of micro pores were controlled by porogen particulates. The sintered β-TCP porous scaffolds possessed connective macro channels of approximately 500 μm and micro pores of 200–400 μm. The porosity
and connectivity of micro pores became higher with the increase of porogen ratio, while the mechanical properties weakened.
The average porosity and compressive strength of β-TCP scaffolds prepared with porogen ratio of 60wt% were 78.12% and 0.2983 MPa, respectively. The cells’ adhesion ratio of
scaffolds was 67.43%. The ALP activity, OCN content and cells micro morphology indicated that cells grew and proliferated
well on the scaffolds.
Funded by the Postdoctor Science Fund of China (No. 20070410715) and Shanghai Excellent Youth Special Fund (No. 17014) 相似文献
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苯乙烯-丙烯酸丁酯超浓乳液聚合的研究 总被引:11,自引:0,他引:11
用一种新的乳液聚合方法-超浓乳液聚合物备了苯乙烯(St)-丙烯酸丁酯(BA)的复合聚合物研究了引发剂的含量,单体体积分数及乳化剂的复配等因素对聚全速率及胶乳粒径的影响,结果表明,超浓乳滞较之本体聚合可得到较高的聚合速率和更大的分子量,且可更容易控制所制备的乳胶粒径。 相似文献
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Microstructure of Selective Laser Sintered Polyamide 总被引:5,自引:0,他引:5
林柳兰 《武汉理工大学学报(材料科学英文版)》2003,18(3):60-63
1 IntroductionSelectivelasersintering (SLS)isanadvancedrapidprototypingtechnologythatcanshortenthedesignandmanufacturingcycle ,hencereducetheproductioncostandincreasethecompetitivenessofnewproducts[1] .SLSisathermalprocess ,creatinglayersbyascanninginfraredla serbeammeltingpowder[2 -4] .Eachlayerisdrawnonthepartcylinderusingthelasertosinterthematerial.Thenthepartbedisloweredandpowder feedingcartridgeraised .Anewcoveringofpowderisnextspreadbyaroll er.Thesinteredmaterialformsthepartwhiletheu… 相似文献
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