共查询到18条相似文献,搜索用时 78 毫秒
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用溶胶凝胶法制备不同比例纳米TiO2改性再生蚕丝丝素蛋白复合膜.SEM与动态光散射纳米粒度分析仪测试结果表明,该丝素膜中纳米TiO2均匀分散在丝素中,TiO2粒径在100nm以下,同时纳米TiO2在丝素中粒径大小主要决定于凝胶过程,成膜过程对粒径大小影响不大;该丝素膜的二级结构用FTIR、XRD、Raman进行表征.测试结果表明,纯丝素膜中存在SilkⅠ向SilkⅡ两种结晶结构,随着纳米TiO2的生成,可使复合丝素膜的结晶结构从SilkⅠ向SilkⅡ转化,但当纳米TiO2的加入超过一定量时,又破坏复合丝素膜的结晶结构. 相似文献
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主要研究了纳米TiO2的加入对内墙涂料性能的影响。结果表明,加入2%纳米TiO2能极大地提高涂料降解甲醛的能力,但加入4%纳米TiO2反而使涂料的性能变差。涂料的常规性能研究也表明,加入少于2%的纳米TiO2对涂料的常规性能会有极大的提高。 相似文献
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Zhen-ding She Wei-qiang Liu Qing-ling Feng 《Frontiers of Materials Science in China》2009,3(3):241-247
One challenge in soft tissue engineering is to find an applicable scaffold, not only having suitable mechanical properties,
porous structures, and biodegradable properties, but also being abundant in active groups and having good biocompatibility.
In this study, a three-dimensional silk fibroin/chitosan (SFCS) scaffold was successfully prepared with interconnected porous
structure, excellent hydrophilicity, and proper mechanical properties. Compared with polylactic glycolic acid (PLGA) scaffold,
the SFCS scaffold further facilitated the growth of HepG2 cells (human hepatoma cell line). Keeping the good cytocompatibility
and combining the advantages of both fibroin and chitosan, the SFCS scaffold should be a prominent candidate for soft tissue
engineering, for example, liver. 相似文献
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One challenge in soft tissue engineering is to find an applicable scaffold, not only having suitable mechanical properties, porous structures, and biodegradable properties, but also being abundant in active groups and having good biocompatibility. In this study, a three-dimensional silk fibroin/chitosan (SFCS) scaffold was successfully prepared with interconnected porous structure, excellent hydrophilicity, and proper mechanical properties. Compared with polylactic glycolic acid (PLGA) scaffold, the SFCS scaffold further facilitated the growth of HepG2 cells (human hepatoma cell line). Keeping the good cytocompatibility and combining the advantages of both fibroin and chitosan, the SFCS scaffold should be a prominent candidate for soft tissue engineering, for example, liver. 相似文献
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Sandeep Kumar 《Particulate Science and Technology》2017,35(3):304-313
The present investigation aims to study the effect of degumming time on the structural property of silk fiber obtained by silk cocoons of Bombyx mori, followed by preparation of the regenerated silk fibroin (RSF) solution which can be subsequently molded into silk nanoparticles. Silk fibers degummed with different media at different time intervals were investigated for the degumming loss and were characterized using Ffourier transform infrared (FTIR), differential scanning calorimetry (DSC), x-ray diffraction (XRD), and scanning electron microscopy (SEM). Maximum degumming was observed when the fibers were treated with sodium carbonate for 60 min. SEM and atomic force microscopy (AFM) images of RSF solution showed aggregation of silk globules resulting in formation of solvated macrochains and giving it an appearance of island-like morphology. Blank silk nanoparticles prepared from the RSF solution showed a smooth and spherical surface devoid of any adhesion using SEM, AFM, and transmission electron microscopy (TEM). The prepared silk nanoparticles may further be explored for loading drug entities and targeting. 相似文献
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丝素蛋白对胶原膜性能改善的研究 总被引:4,自引:1,他引:4
天然高分子由于其良好的生物相容性而受到广泛的关注。本研究用酶法自制了具有一定水溶性的猪皮胶原。尝试利用丝素和胶原蛋白各自的优点。用简单的溶液浇铸法制备了胶原-丝素共混膜。并通过FTIR、TGA、SEM等手段对其结构进行了表征。结果表明。由于共混膜中俩组份间存在的分子间作用力,加入小于50%的丝素的胶原膜经乙醇处理后与纯胶原膜相比。其力学性能及热稳定性有所的改善。通过改变丝素比例可以调整共混膜的吸水性。由于两组分良好的生物相容性,预料该共混膜可用作生物材料。 相似文献
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针对传统高分子过滤膜使用有机溶剂易造成环境污染的问题,以氯化锌水溶液为溶剂,丝朊均相接枝聚丙烯腈,加入纳米TiO2得到铸模液,以水为凝固浴,制备TiO2共混的丝朊接枝聚丙烯腈(SF-g-PAN/TiO2)过滤膜。通过扫描电子显微镜,红外光谱等方法对膜进行表征,研究不同TiO2含量的SF-g-PAN过滤膜的亲水性、抗污染性能、力学性能以及SF-g-PAN/TiO2膜对不同分子量染料的截留。结果表明:随着TiO2含量的增加,膜的力学强度先增大后减小。TiO2含量为1%(质量分数)时,膜的力学和抗污染性能最好;在0.10 MPa下,SF-g-PAN/TiO2膜对于分子量大于660的染料截留率为96%以上,通量达到80 L/(m^2·h)。 相似文献
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模仿蚕丝的成分、结构和成丝方法,通过同轴干法纺丝初步制备了以添加有金属钙离子(Ca2+)并调节了pH值的再生丝素蛋白(RSF)为芯层、丝胶蛋白(SS)为皮层的RSF/SS纤维。采用荧光显微镜、扫描电镜、拉曼光谱和材料试验机研究了所得纤维的微观形貌、二级结构和力学性能,并与纯RSF纤维和蚕丝进行了对比。研究结果表明同轴干法纺RSF/SS纤维具有清晰的皮-芯层结构,直径较粗且表面略有皱痕;与纯RSF纤维相比,该初生纤维具有更多的β-折叠构象,力学性能也相对较好,但与天然蚕丝相比尚有较大差距。 相似文献