分别采用5%海藻酸钠、2%甲基纤维素、复合防腐剂 ST 和3%海藻酸钠、2%甲基纤维素、复合防腐剂 ST 制作人工种子种皮下壳和上壳,用营养小颗粒(由1.5%海藻酸钠、5.5%蔗糖、适当的无机元素和激素、保水吸附物质 C、0.1%活性炭制成)和琼脂...分别采用5%海藻酸钠、2%甲基纤维素、复合防腐剂 ST 和3%海藻酸钠、2%甲基纤维素、复合防腐剂 ST 制作人工种子种皮下壳和上壳,用营养小颗粒(由1.5%海藻酸钠、5.5%蔗糖、适当的无机元素和激素、保水吸附物质 C、0.1%活性炭制成)和琼脂作为胚乳材料,用制模法制成香蕉人工种子。制成的人工种子在不再供给外来营养和有菌条件下放置,便可萌发成株,成苗率达100%。展开更多
A hybrimer based on epoxy resin and phenyl-siloxane was prepared by polymerization and a solgel condensation reaction in which Eporite-904 (807 g/eq) bisphenol-A-type epoxy resin, 3-isocyanatopropyltriethoxysilane (IP...A hybrimer based on epoxy resin and phenyl-siloxane was prepared by polymerization and a solgel condensation reaction in which Eporite-904 (807 g/eq) bisphenol-A-type epoxy resin, 3-isocyanatopropyltriethoxysilane (IPTES) and phenyltriethoxysilane (PTEOS) acted as precursors. The thermal and optical properties of the epoxy/siloxane hybrimer were studied. The thermogravimetric analysis (TGA) results implied that the hybrimer could increase the crosslink density and enhance the thermal properties. The optical properties were measured after thermal and UV aging. The refractive indexes of the epoxy/siloxane hybrimers were 1.66 - 1.70, and the transmittances of the cured hybrimers were above 90% in the visible wavelength. After a 120°C/24-h thermal aging test, the decreases in the refractive index and transmittance were less than 5% and 20% respectively. The epoxy/siloxane hybrimers also showed low discoloration upon thermal aging at 120°C for 24 h under an air atmosphere.展开更多
文摘分别采用5%海藻酸钠、2%甲基纤维素、复合防腐剂 ST 和3%海藻酸钠、2%甲基纤维素、复合防腐剂 ST 制作人工种子种皮下壳和上壳,用营养小颗粒(由1.5%海藻酸钠、5.5%蔗糖、适当的无机元素和激素、保水吸附物质 C、0.1%活性炭制成)和琼脂作为胚乳材料,用制模法制成香蕉人工种子。制成的人工种子在不再供给外来营养和有菌条件下放置,便可萌发成株,成苗率达100%。
文摘A hybrimer based on epoxy resin and phenyl-siloxane was prepared by polymerization and a solgel condensation reaction in which Eporite-904 (807 g/eq) bisphenol-A-type epoxy resin, 3-isocyanatopropyltriethoxysilane (IPTES) and phenyltriethoxysilane (PTEOS) acted as precursors. The thermal and optical properties of the epoxy/siloxane hybrimer were studied. The thermogravimetric analysis (TGA) results implied that the hybrimer could increase the crosslink density and enhance the thermal properties. The optical properties were measured after thermal and UV aging. The refractive indexes of the epoxy/siloxane hybrimers were 1.66 - 1.70, and the transmittances of the cured hybrimers were above 90% in the visible wavelength. After a 120°C/24-h thermal aging test, the decreases in the refractive index and transmittance were less than 5% and 20% respectively. The epoxy/siloxane hybrimers also showed low discoloration upon thermal aging at 120°C for 24 h under an air atmosphere.
