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硅膠管的優(yōu)點(diǎn)有哪些
有機(jī)硅是眾多產(chǎn)品的商業(yè)名稱(chēng)，但大多數(shù)由聚二甲基硅氧烷（PDMS）制成。這些聚合物的特點(diǎn)是共價(jià)鍵強(qiáng)度高，抗均裂斷鏈（有機(jī)硅具有紫外線（UV）穩(wěn)定性；也具有熱穩(wěn)定性和化學(xué)穩(wěn)定性，所以容易滅菌）。其極性主鏈易發(fā)生異裂斷鏈，但鏈上的甲基基團(tuán)可提供保護(hù)作用。
Organosilicon is the commercial name of many products, but it is mostly made from poly two methylsiloxane (PDMS). These polymers are characterized by high covalent bond strength, anti split chain fracture chain (organosilicon with UV (UV) stability, thermal stability and chemical stability, so it is easy to sterilize). The main chain of its polar chain is liable to undergo cleavage, but the methyl group on the chain can provide protection.
因此，有機(jī)硅具有疏水性，水在聚二甲基硅氧烷（PDMS）模型表面的接觸角較高，為 108°。由于這種疏水性，在缺少表面活性劑的情況下，有機(jī)硅與水介質(zhì)不發(fā)生反應(yīng)，僅在強(qiáng)堿或強(qiáng)酸的環(huán)境中才會(huì)發(fā)生反應(yīng)。
Therefore, silicone has hydrophobicity and water contact angle on the surface of poly two methylsiloxane (PDMS) model is 108 degrees. Because of this hydrophobicity, in the absence of surfactants, the organosilicon does not react with the water medium, only in the environment of strong alkali or strong acid.
軟管在擠出成型后包裝供應(yīng)，一般為 50 英尺線圈型，單獨(dú)裝在雙層密封聚乙烯袋中。值得一提的是，由于硅氧烷具有熱固性，它們不能被再加工如同熱塑性塑料。出于同樣的原因，它們不能熱密封；因此，連接時(shí)，硅膠管套在軟管倒鉤接頭上，并用兩根扎帶從相反方向系牢，固定好軟管。共模壓成型是可行的，有時(shí)用于醫(yī)療器械領(lǐng)域。
The hose is supplied after extrusion, generally 50 feet coil type, and is individually installed in a double sealed polyethylene bag. It is worth mentioning that because siloxane is thermosetting, they can not be reprocessed like thermoplastics. For the same reason, they can't be hot sealed; therefore, the silica gel sleeve is attached to the hose reversal joint and is fastened in the opposite direction with two ligature bands, and the hose is fixed. Co molding is feasible and sometimes used in the field of medical devices.
硅膠管外觀和機(jī)械性能
Appearance and mechanical properties of silica gel tube
與一些有機(jī)熱塑性塑料相比，有機(jī)硅的透明度最好描述為“半透明”。這一結(jié)果是因?yàn)橹谱鬈浌艿挠袡C(jī)硅彈性體由有機(jī)硅聚合物和無(wú)定形二氧化硅組成。由于這兩種材料具有不同的折射率，并且沒(méi)有特定混合法來(lái)使它們相配，因此所有硅膠管都是半透明的。
Compared with some organic thermoplastic, the transparency of silicone is best described as "translucent". The result is that silicone elastomers for making hoses consist of silicone polymers and amorphous silica. Because the two materials have different refractive indices and there is no specific mixing method to match them, all silicone tubes are translucent.
硅膠管固化后，有機(jī)硅彈性體表現(xiàn)出有意義的機(jī)械性能，這包括中等硬度和高斷裂伸長(zhǎng)率，但拉伸強(qiáng)度比聚氨酯（PU）低。與聚四氟乙烯（PTFE）相比，它們具有發(fā)粘的表面和較高的摩擦系數(shù)，但剛性要小得多。由于具有疏水性并且是優(yōu)良的電絕緣體，所以它們會(huì)吸引灰塵。它們的工作溫度范圍比聚氯乙烯（PVC）更大。
After the silicone tube was solidified, the organosilicon elastomer showed significant mechanical properties, which included medium hardness and high elongation at break, but the tensile strength was lower than that of polyurethane (PU). Compared with polytetrafluoroethylene (PTFE), they have visbreaking surfaces and higher friction coefficient, but the rigidity is much smaller. Because they are hydrophobic and are excellent electrical insulators, they attract dust. Their working temperature range is larger than that of PVC (PVC).
