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纳米羟基磷灰石/天然胶乳复合乳胶膜的制备及性能表征 总被引:2,自引:0,他引:2
对比研究了纳米羟基磷灰石(n-HA)经硅烷偶联剂(KH-570)表面改性前后的性能变化,实验结果表明,n-HA经改性后,疏水性得到提高,其表面与KH-570发生了偶联作用(FT-IR);将改性的n-HA与天然胶乳复合制备复合乳胶膜,力学性能测定结果表明,复合乳胶膜的力学强度与未经处理的相比有一定提高;另外n-HA还能够有效的抑制复合乳胶膜中水溶性蛋白的析出,利用考马斯亮蓝法测定复合材料中的水溶性蛋白,随着n-HA的添加量的增加,复合乳胶膜中的水溶性蛋白被屏蔽,溶出量逐渐降低。 相似文献
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我国乳胶制品门类齐全、价格适中、质量较高,具有一定的国际竞争力。2008年下半年,金融危机使我国乳胶制品出口严重受阻。我国乳胶企业积极应对,坚持自主创新,加强技术进步,调整产品结构,开展节能减排,取得了较好成效。我国乳胶制品2009年消费天然胶乳18万t,工业总产值60多亿元。预计国内外乳胶制品总体需求仍稳步增长,金融危机过后,我国乳胶行业将继续平稳较快发展。 相似文献
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天然胶乳因其高强度、高弹性、高柔软性和成膜性能好,以及较低的成本价格,使其在乳胶弹性制品市场占据重要位置。除更好的物理和化学性能以外,医用乳胶制品比普通乳胶制品的要求更高。本文针对医用仿生助产仪配套用高品质乳胶球囊产品,通过产品外形设计、配方和工艺设计优化,在保证乳胶球囊在高膨胀率、高充盈状态下物理性能的前提下,降低亚硝胺含量和蛋白质含量,从而提高产品整体质量,满足同类产品的国内市场需求。 相似文献
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1前言传统的布面胶鞋生产,都是使用以溶剂、汽油等有机溶剂溶解混炼胶片制成的汽油胶浆,虽然粘合效果好,但由于大量使用易挥发的有机溶剂,生产和使用极不方便,既危害工人健康,污染环境,又造成安全隐患,需要完善的通风、防火措施;而且制备工艺复杂,流程长,能耗高。国内外的胶粘剂行业正大力发展各种水基粘合剂来取代现在广泛使用的有机粘合剂。天然乳胶在市面胶鞋中的应用正顺应了这一发展方向。2配方设计21原理可用传统的“促进剂、硫磺”的形式使胶乳硫化,使其具备使用性能;配入适当的防老剂,以保证使用寿命。由于天然乳胶容… 相似文献
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The degradability under various conditions of five kinds of radiation-vulcanized natural rubber latex (RVNRL) films was studied. The treatments were leaching in methanol, leaching in 1% ammonia solution, mixing with tris(nonylated phenyl)phosphite (TNP) antioxidant, blending with poly(methyl methacrylate) (PMMA), and grafting with PMMA, Comparisons were made with sulfur-vulcanized natural rubber latex (SVNRL) film. RVNRL films SVNRL film can be kept for a long time when indirectly exposed to sunlight at room temperature. However, the former degraded much more rapidly than did the latter. TNP was found to be very suitable as an antioxidant to prolong the life of RVNRL films under dry conditions. PMMA, either blended or grafted with RVNRL, was ineffective in the prevention of deterioration of RVNRL films. The rapid degradation of RVNRL products could be an advantage over SVNRL products in environmental and wildlife conservation. © 1994 John Wiley & Sons, Inc. 相似文献
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讲述了无粉天然胶乳制品的生产方法及用其制造的无粉天然胶乳手套。该手套的可抽出蛋白质含量非常低,无需经卤化处理。这种方法是:在将天然胶乳制品从模型上剥离下来的前后,采用漂洗溶液处理。由于漂洗溶液含有离子形式的离解金属盐,可降低胶乳中的蛋白质含量。当制品从模型上剥离下来后,漂洗溶液也可除掉制品上的残留粉末,生产出无粉末的天然胶乳制品。无氯处理的制品具有良好的抓着性能,并且贮存期也比同类经氯化处理的制品要高。 相似文献
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Hydrogenation is an important method of chemical modification, which improves the physical, chemical, and thermal properties of diene‐based elastomers. Natural rubber latex (NRL) could be hydrogenated to a strictly alternating ethylene–propylene copolymer using diimide generated in an in situ system. The diimide generated using the in situ technique for hydrogenation of NRL was accomplished by thermolysis of p‐toluenesulfonyl hydrazide (TSH). A molar ratio of TSH to double bonds equal to 2 : 1 was found to be the optimum ratio to provide a high percentage of hydrogenation. 95% Degree of saturation of NRL was achieved in o‐xylene. Hydrogenated products are characterized by FTIR and NMR spectroscopy. The thermal stability of hydrogenated rubber was improved as shown from the results of thermogravimetric analysis. From the differential scanning calorimetry measurement, the glass transition temperature of the hydrogenated product did not appear to change. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2885–2895, 2007 相似文献
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Hydrogenation is one important method of chemical modification, which improves the physical, chemical and thermal properties of diene‐based elastomers. Natural rubber latex (NRL) could be hydrogenated to a strictly alternating ethylene‐propylene copolymer using a diimide reduction system. The diimide reduction technique of NRL was accomplished by using hydrazine hydrate/hydrogen peroxide and Cu2+ as catalyst. The hydrogenated products are characterized by FTIR and NMR spectroscopy. It has been found that cupric acetate is a highly active catalyst for the reaction and the addition of a controlled amount of gelatin demonstrated a beneficial effect on the degree of hydrogenation, whereas, sodium dodecyl sulfate (SDS) acted as a stabilizer of the latex particle in the reaction system and reduced the degree of hydrogenation. In the presence of SDS, a longer reaction time and a higher amount of hydrazine hydrate was required for hydrogenation of NRL. Gel formation during hydrogenation does not significantly affect the degree of hydrogenation. Gel inhibitors such as hydroquinone also decrease the degree of hydrogenation. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007 相似文献
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