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由华南理工大学申请的专利(公开号CN104721875B,公开日期2017-03-01)"一种亲水型硅橡胶医用敷料及其制备方法",涉及的亲水型硅橡胶医用敷料由基体(硅橡胶材料,包括室温硫化硅橡胶或者热硫化硅橡胶)和表层接枝物(亲水性物质,包括纤维素衍生物、壳聚糖及其衍生物、硫酸软骨素类材料、聚氨基酸、合成多肽或胶原蛋白)组成。该硅橡胶薄膜表面的水浸润性较好,具有良好的生物相容性。 相似文献
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《现代塑料加工应用》2020,(3)
利用废弃资源稻壳灰(RHA)作为增强填料,与聚丁二酸丁二醇酯(PBS)进行熔融共混制备RHA/PBS生物可降解复合材料。使用硅烷偶联剂KH-560对RHA进行表面处理。采用力学性能测试、扫描电子显微镜和热重分析仪等对复合材料力学性能、界面相容性及热稳定性进行研究。结果表明:硅烷偶联剂改性后的RHA(RHA-KH)与基体PBS界面相容性更好,并且能够在一定程度上提升复合材料的力学性能和热稳定性;RHA-KH/PBS复合材料的综合性能得到了提高。 相似文献
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在生物医用材料血液相容性的影响因素中,材料表面与水的相互作用极其关键。以医用聚氨酯材料为聚合物模型,综述了医用聚氨酯表面亲水性功能化的研究进展:探讨水在抗血液蛋白非特异吸附以及抗血栓功能中所起的作用;讨论亲水性乙烯类单体、聚乙二醇及其衍生物、肝素及两性离子化合物等改性聚氨酯界面上的水分子行为及其对血液相容性的影响。理解水和水化层在材料和血液接触过程中所起的关键作用,将为聚合物生物材料的表面设计和应用提供重要的依据。 相似文献
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以纳米碳酸钙(CaCO3)为原料,采用溶胶沉积法制备出具有核/壳结构的纳米CaCO3/SiO2复合粒子,并将其原位有机杂化。用纳米CaCO3/SiO2复合粒子替代部分气相法白炭黑作为硅橡胶的补强填料,采用扫描电子显微镜、拉力试验机、热失重仪等对改性硅橡胶的力学性能和热稳定性能进行表征。结果表明:有机杂化剂的种类不同,纳为CaCO3/SiO2复合粒子对硅橡胶的补强效果不同;与用未杂化的纳米CaCO3/SiO2复合粒子取代部分气相法白炭黑的硅橡胶相比,用经A-151杂化的复合粒子取代部分气相法白炭黑的硅橡胶,其拉伸强度、断裂伸长率得到明显改善,耐热性也得到提高;但撕裂强度大大降低。同时还发现,硅橡胶的力学性能及耐热性能在很大程度上也与复合粒子的取代量有关;即使是经KH-570杂化的复合粒子,当取代量小于10%时,其硅橡胶的性能也优于全部用气相法白炭黑补强的硅橡胶。 相似文献
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Sugata Chakraborty Rajatendu Sengupta Saikat Dasgupta Rabindra Mukhopadhyay Samar Bandyopadhyay Mangala Joshi Suresh C. Ameta 《Polymer Engineering and Science》2009,49(7):1279-1290
In the present study, naturally occurring unfractionated bentonite clay was used to prepare styrene butadiene rubber/bentonite clay nanocomposite by latex stage blending. The bentonite clay was organo‐modified by in situ resol formation by the reaction of resorcinol and formaldehyde. The latex clay mixture was co‐coagulated with acid. The resulting clay masterbatch was compounded and evaluated by Fourier Transform Infrared spectroscopy, X‐ray diffraction (XRD), Transmission Electron Microscopy (TEM), Energy Dispersive X‐ray spectroscopy (EDS), Scanning Electron Microscopy, Thermogravimetric analysis, and Differential Scanning Calorimetry. XRD showed that the interplanar distance of the in situ resol‐modified bentonite clay increased from 1.23 to 1.41 nm for the unmodified bentonite. TEM analysis indicated partial exfoliation and/or intercalation. EDS (Si and Al mapping) of the clay revealed the nature of the dispersion in the nanocomposites vis‐à‐vis the conventional styrene‐butadiene rubber (SBR)/bentonite clay composite. Thermogravimetric analysis was used to compare the decomposition trends of the SBR/clay nanocomposites with the SBR/clay composite. The glass transition temperature of SBR/clay nanocomposites increased as compared with that of neat SBR. Substantial improvement in most of the other mechanical properties was also observed in case of the nanocomposites. POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers 相似文献
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采用原位填充白炭黑与甲基丙烯酸(酯)改性相结合的方法制备了室温硫化(RTV)硅橡胶胶黏剂,用红外光谱与凝胶渗透色谱表征了RTV硅橡胶的结构及其胶黏剂的相对分子质量,用扫描电子显微镜分析了白炭黑的分散性,并考察了胶黏剂对金属铝黏接性能的影响因素。结果表明,RTV硅橡胶、甲基丙烯酸(酯)与白炭黑形成了共聚物;随着白炭黑含量的增加,胶黏剂的相对分子质量分布变宽;当偶联剂γ-氨丙基三乙氧基硅烷/正钛酸四丁酯(质量比3)质量分数为1.5%,白炭黑质量分数为1.5%,交联剂原硅酸四乙酯及催化剂二月桂酸二丁基锡的质量分数分别为1.0%,0.1%时,胶黏剂粘接铝的最大剪切强度可达到5.64MPa。 相似文献
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硅橡胶/水凝胶半互穿网络膜的制备研究 总被引:1,自引:0,他引:1
通过交联的聚甲基乙烯基硅橡胶膜含浸甲基丙烯酸β 羟乙酯单体溶液,然后以原位聚合的方法制得硅橡胶—水凝胶半互穿网络膜。用扫描电镜观察膜的横断面,并以X射线光电子能谱研究膜的表面组成。测试膜在水中的溶胀性能及膜对小分子药物的渗透性。 相似文献
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Shen Diao Shengyou Zhang Zhizhou Yang Shengyu Feng Changqiao Zhang Zhaohua Wang Guogang Wang 《应用聚合物科学杂志》2011,120(4):2440-2447
Two kinds of treated fumed silica were prepared by treatment with either tetraphenylphenyltriethoxysilane (TPHTS) or both tetraphenylphenyltriethoxysilane and hexamethyldisilazane (TPHMTS), and were used as reinforcing filler for silicone rubber. The resistance to irradiation of the silicone rubber obtained was investigated by gamma ray of dose 500 kGy in air. The mechanical properties and the average molecular weight between crosslinking points (Mc) of the silicone rubber were determined before and after irradiation. The results show that the fumed silica treated by tetraphenylphenyltriethoxysilane (TPHPHS) can effectively improve the radiation resistance of silicone rubber while the fumed silica treated by both tetraphenylphenyltriethoxysilane and hexamethyldisilazane (MMN) cannot only effectively improve the radiation resistance of silicone rubber but also has excellent reinforcing effect on silicone rubber. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献