硅胶

Abstract(#br)The effect of addition of small amounts of stearic acid on the adhesive properties of polydimethylsiloxane (PDMS) was investigated. Stearic acid reduced the peel strength of bonded aluminium samples with the joint weakening effect increasing with increased loadings. Surface analysis of the peeled surfaces was carried out using XPS, SSIMS and FTIR. This showed that stearic acid did not form a weak boundary layer at the metal–polymer interface as would traditionally be expected.

Abstract(#br)A silicone microreactor with 500\u003cce:hsp sp=\"0.25\"/\u003eμm-width microchannels coated with a Au/TiO 2 photocatalyst was manufactured and tested for the photocatalytic generation of hydrogen from gaseous water-ethanol mixtures under dynamic conditions. The manufacture of the microreactor included the fabrication of a polylactic acid (PLA) mold with a 3D printer and casting with polydimethylsiloxane (PDMS) prepolymer.

Background: Mechanosensing of cells, particularly the cellular response to substrates with different elastic properties, has been discovered in recent years, but almost exclusively in mammalian cells. Much less attention has been paid to mechanosensing in other cell systems, such as in eukaryotic human pathogens. Results: We report here on the influence of substrate stiffness on the adhesion of the human pathogen Acanthamoebae castellanii (A. castellanii) . By comparing the cell adhesion area of A.

To create a biologically inert material suitable for use in a wide range of temperatures and in corrosive environments, the methods of optical microscopy and NMR-cryometry were used for investigation of emulsification of solutions of human serum albumin and hyaluronic acid in polymethylsiloxane PDMS-1000. Unlike hyaluronic acid, human serum albumin forms persistent emulsions in the silicon matrix, whose size of the droplets varies from 100 to 10 000 nm. The presence of dispersed phase (human serum albumin or hyaluronic acid) increases significantly melting temperature of polydimethylsiloxane.

本文旨在从尺寸精度、力学性能、各向同性和固化后收缩等方面考察数字光加工( DLP )光固化PDMS的印刷性能。采用不同取向、不同尺寸和不同后曝光条件对PDMS进行打印，并通过拉伸试验和显微镜对打印性能进行评价。结果表明，打印件具有较好的精度和较低的收缩率，但在模量、延展性和强度方面具有较高的方向性。尺寸误差小于2 %，收缩率小于0.52 %。相比之下，模数随打印方向的变化在0.87 ~ 0.96 MPa之间，伸长率在34.7 % ~ 66.4 %之间，强度在0.23 ~ 0.49 MPa之间。本文还讨论了PDMS打印对未来推进的挑战。

压痕硬度和划痕试验是工业和实验室常用的测定薄膜力学性能的技术。在这里，我们提出测定由具有弹性性质和自修复效应的聚二甲基硅氧烷和聚硅氧烷混合物组成的薄膜的弹性模量和硬度的相对值。本研究利用显微镜和扫描台设计了一种自制的纳米压痕和纳米划痕测试仪，可对弹性模量较低的透明材料进行测量，并可识别薄膜的自修复效应。

硅栓塞综合征( SES )是硅凝胶和液体硅凝胶注射后的常见并发症。很少有男性使用生理性盐溶液或液体硅胶注入阴囊、阴茎、上生殖器或腹股沟区皮下组织。那些自称“硅人”的男人，想要得到更大的阴茎和阴囊，穿衣服时也是可见的。在上述区域注射液态硅油可导致肺和肝脏液态硅油栓塞，有时会像本例一样，最终导致右心衰死亡。尸检发现生殖器区皮下组织有\"蛙卵\"样空泡，肺和肝脏有液体硅栓塞。此外，毒理学分析也显示了不同液体有机硅。较小的寡聚物被转运到肺和肝脏，较大的寡聚物在注射部位表现为局部富集。检获的聚二甲基硅氧烷( PDMS )在腹部脂肪、血液或尿液中均无法检测到，可能是由于脂肪组织灌注量低、血液和尿液的水相性质或末次注射至死亡之间的时间跨度大。

硅栓塞综合征( SES )是硅凝胶和液体硅凝胶注射后的常见并发症。很少有男性使用生理性盐溶液或液体硅胶注入阴囊、阴茎、上生殖器或腹股沟区皮下组织。那些自称“硅人”的男人，想要得到更大的阴茎和阴囊，穿衣服时也是可见的。在上述区域注射液态硅油可导致肺和肝脏液态硅油栓塞，有时会像本例一样，最终导致右心衰死亡。尸检发现生殖器区皮下组织有\"蛙卵\"样空泡，肺和肝脏有液体硅栓塞。此外，毒理学分析也显示了不同液体有机硅。较小的寡聚物被转运到肺和肝脏，较大的寡聚物在注射部位表现为局部富集。检获的聚二甲基硅氧烷( PDMS )在腹部脂肪、血液或尿液中均无法检测到，可能是由于脂肪组织灌注量低、血液和尿液的水相性质或末次注射至死亡之间的时间跨度大。