WANG H N, LI Y B, ZUO Y, et al. Biocompatibility and osteogenesis of biomimetic nano-hydroxyapatite/polyamide composite scaffolds for bone tissue engineering [J]. Biomaterials, 2007, 28(22): 3338-3348. [2] LANDI E, VALENTINI F, TAMPIERI A. Porous hydroxyapatite/ gelatine scaffolds with ice-designed channel-like porosity for biomedical applications [J]. Acta Biomater, 2008, 4(6): 1620-1626. [3] HORNEZ J C, CHAI F, MONCHAU F, et al. Biological and physico- chemical assessment of hydroxyapatite (HA) with different porosity [J]. Biomol Eng, 2007, 24(5): 505-509. [4] DESCAMPS M, HORNEZ J C, LERICHE A. Manufacture of hydroxyapatite beads for medical applications [J]. J Eur Ceram Soc, 2009, 29(3): 369-375. [5] HE L H, STANDARD O C, HUANG T T Y, et al. Mechanical behaviour of porous hydroxyapatite [J]. Acta Biomater, 2008, 4(3): 577-586. [6] ETIENNE M, EDUARDO S, ANTONI P T. Architectural control of freeze-cast ceramics through additives and templating [J]. J Am Ceram Soc, 2009, 92(7): 1534-1539. [7] HE Feng, LIU Changsheng. Preparation of porous glass-ceramic with controlled pore size and porosity by adding porosifier [J]. J Inorg Mater (in Chinese), 2004, 19(6): 1267-1276. [8] LEE E J, KOH Y H, YOON B H, et al. Highly porous hydroxyapatite bioceramics with interconnected pore channels using camphene-based freeze casting [J]. Mater Lett, 2007, 61(11): 2270-2273. [9] LIM Y M, GWON H J, SHIN J W, et al. Preparation of porous poly(-caprolactone) scaffolds by gas foaming process and in vitro/in vivo degradation behavior using γ-ray irradiation [J]. J Ind Eng Chem, 2008, 14(4): 436-441. [10] JUN I, KOH Y, SONG J, et al. Improved compressive strength of reticulated porous zirconia using carbon coated polymeric sponge as novel template [J]. Mater Lett, 2006, 60(20): 2507-2510. [11] QI Xiaopeng, YE Jiandong, WANG Xiupeng, et al. Preparation and characterization of macroporous calcium phosphate cement scaffold with oriented pore structure [J]. J Chin Ceram Soc, 2007, 35(12): 1577-1581. [12] YOON B H, PARK C S, KIM H E, et al. In-situ fabrication of porous hydroxyapatite (HA) scaffolds with dense shells by freezing HA/ camphene slurry [J]. Mater Lett, 2008, 62(10): 1700-1703. [13] YUNOKI T, IKOMA S, MONKAWA A, et al. Control of pore structure and mechanical property in hydroxyapatite/collagen composite using unidirectional ice growth [J]. Mater Lett, 2006, 60(8): 999-1002. [14] BRIENA F J O, HARLEYB B A, YANNASB I V, et al. Influence of freezing rate on pore structure in freeze-dried collagen-GAG scaffolds [J]. Biomaterials, 2004, 25(6): 1077-1086. [15] DEVILLE S, SAIZ E, NALLA R K, et al. Freezing as a path to build complex composites [J]. Science, 2006, 311(3): 515-518. [16] ZHAO Kang, WEI Junqi, LUO Defu, et al. Fabrication of hydroxyapatite porous scaffolds by freeze drying [J]. J Chin Ceram Soc (in Chinese), 2009, 37(3): 432-435. [17] TANG Y F, ZHAO K, WEI J Q, et al. Fabrication of aligned lamellar porous alumina using directional solidification of aqueous slurries with an applied electrostatic field [J]. J Eur Ceram Soc, 2010, 30(9): 1963-1965. [18] ZHENG Xiaodong. Freeze-drying Technology and Freeze Dryer [M](in Chinese). Beijing: Chemical Industry Press, 2005: 6-7. [19] PETERSEN A, RAU G, GLASMACHER B. Reduction of primary freeze-drying time by electric field induced ice nucleus formation [J]. Heat Mass Transf, 2006, 42(10): 929-938.
