王英波
,
鲁雄
,
冯波
,
屈树新
,
翁杰
无机材料学报
doi:10.3724/SP.J.1077.2011.00061
采用脉冲电化学沉积法制备磷酸钙/明胶(CaP/Gelatin)复合涂层,对其进行表征及性能测试,旨在得到综合性能好的生物医用复合涂层.研究中讨论了不同脉冲电位、明胶浓度、沉积温度、电解液pH值等对复合涂层性能的影响.研究发现脉冲电位下涂层质量优于恒电位.XRD和FTIR分析表明复合涂层的成分为羟基磷灰石和明胶.SEM观察发现复合涂层是结构均匀的多孔网状或花瓣状微纳结构.复合涂层形貌及成分随脉冲电位、明胶浓度等实验条件的变换而变化.低电位利于复合涂层的结晶和沉积.改变明胶在钙磷电解液中的浓度,发现明胶浓度在0.1～1.0 g/L范围内不影响涂层形貌,但影响明胶在复合涂层中的含量.沉积温度为50℃,电解液pH值在明胶等电点以下保证了复合涂层具有较好的结晶性、均匀性.Alamar Blue检测表明复合涂层具有较好的生物相容性.
关键词:
脉冲电沉积
,
羟基磷灰石
,
Gelatin
,
复合涂层
,
生物相容性
Pan Ting
,
Song Wenjing
,
Cao Xiaodong
,
Wang Yingjun
材料科学技术（英文）
doi:10.1016/j.jmst.2016.01.007
Gelatin/Alginate hydrogels were engineered for bioplotting in tissue engineering. One major drawback of hydrogel scaffolds is the lack of adequate mechanical properties. In this study, using a bioplotter, we constructed the scaffolds with different pore architectures by deposition of gelatin/alginate hydrogels layer-by-layer. The scaffolds with different crosslinking degree were obtained by post-crosslinking methods. Their physicochemical properties, as well as cell viability, were assessed. Different crosslinking methods had little influence on scaffold architecture, porosity, pore size and distribution. By contrast, the water absorption ability, degradation rate and mechanical properties of the scaffolds were dramatically affected by treatment with various concentrations of crosslinking agent (glutaraldehyde). The crosslinking process using glutaraldehyde markedly improved the stability and mechanical strength of the hydrogel scaffolds. Besides the post-processing methods, the pore architecture can also evidently affect the mechanical properties of the scaffolds. The crosslinked gelatin/alginate scaffolds showed a good potential to encapsulate cells or drugs.
关键词:
Bioplotting
,
Tissue engineering
,
Scaffolds
,
Gelatin
,
Alginate
Fan Changjiang
,
Wang Dong-An
材料科学技术（英文）
doi:10.1016/j.jmst.2016.04.009
In this study, we develop the gelatin-dopamine (Gel-Dopa) nano-gels (GDNGs) and explore their potential as drug delivery vehicles. The Gel-Dopa precursor is synthesized using EDC/NHS coupling reaction, in which the catechols can coordinate with transition metal ions such as Fe3+. These novel GDNGs exhibit excellent cytocompatibility. The model drug, doxorubicin (Dox), is readily conjugated into catechol of GDNGs by the coordination cross-link of Fe3+ ion. The morphology and size distribution of the nano-gels are characterized via field emission scanning electron microscopy and particle size analyzer, respectively. The GDNGs loaded with Dox (GDNGs-Dox) is capable of efficiently penetrating cell membrane and enter the HeLa cells. The endocytosed GDNGs-Dox release Dox molecules and subsequently kill the tumor cells.
关键词:
Gelatin
,
Dopamine
,
Doxorubicin
,
Coordination interaction
,
Drug delivery
张玲
,
董伟
,
李文翠
新型炭材料
采用生物高分子明胶为氮源,与间苯二酚和甲醛共聚,由共聚物热解制得三维网状含氮多孔炭,并考察其作为超级电容器电极材料的电化学性能。结果表明,明胶通过共聚反应连接到酚醛树脂骨架中,由于其能降低反应体系的界面能,改变了聚合物的形貌,所得炭材料具有由较小颗粒交联而成的三维网状结构；改变明胶掺入量,多孔炭的氮含量可从1.04%增加至2.03%；由于氮掺杂作用,将其用作超级电容器电极材料,其电容值较单纯酚醛聚合体系得到的炭样品增加一倍,由76 F·g-1增至149 F·g-1,且电容值随着氮含量的增加而增加；当氮含量增至2.03%时,受其比表面积限制,其电容值不再增加,经水活化,材料比表面积达1174 m2·g-1,氮含量为1.51%,其电容值达228 F·g-1。
关键词:
明胶
,
含氮多孔炭
,
超级电容器
