PDMS

The emphasis of this paper lies in the fabrication of a three-layer polydimethylsiloxane chip for micro liquid sample operation. In this paper, the microchannels with a rectangular control layer cross section are fabricated based on a dry-film negative photoresist mold, while the microchannels with a rounded liquid layer cross section are fabricated by a positive photoresist reflow mold. The relationships between temperature and the time of reflow and the arc level of the liquid layer mold are discussed.

本研究提出了一种可用于生物医学应用的检测血管内壁压力的先进软、生物相容性换能器。该装置包括由椭球结构的聚二甲基硅氧烷封装的三维电活性聚合物芯元件。器件在其传感机构经历不同压力时产生电压输出，从而在不同方向产生变形。因此，可以用来检测不同刚度值的内壁所受的压力。输出电压是由器件的传感机构所经历的应变引起的，无需外加电源。由离子聚合物-金属复合材料制成的核心元件具有独特的中空设计；这使得导管可以通过，核心元件可以固定在导管上的任意位置。我们还证明，该装置可以与医用经皮血管成形术球囊导管集成，形成智能传感模块。该模块可检测血管模体内壁周围不同程度的脂肪堆积。讨论了利用研制的装置获得的信号来评估容器的堵塞和刚度。

本文提出了一种用于X和Ku波段应用的光学透明、柔性微波吸收器。该吸收剂采用光学透明的ITO涂复PET薄膜来产生欧姆损耗，聚二甲基硅氧烷作为介质基板来实现光学透明和柔性。该结构的新颖之处在于其光学透明性和灵活性，与以往报道的吸收体相比，吸收带宽和最小厚度都有所增加。该吸收剂在8.00 ~ 20.70 GHz的频率范围内具有吸收率( 90 %以上)。吸收体的厚度为0.196λg (其中λg对应于介电常数εr的导波波长)。提出了一种与全波模型吻合较好的等效电路模型。

Abstract(#br)In this paper, we prepare a novel photochromic hydrophobic cotton fabric with high sensitivity after irradiated by ultraviolet light, excellent fatigue resistance, and good hydrophobic properties. Additionally, it can quickly return to the primary color under conditions of green light, heat or dark, respectively. The target photochromic spiropyrane compound was firstly synthesized and prepared into microcapsules as core and chitosan as shell to improve the fatigue resistance.

Abstract(#br)Bio-ethanol, clean and renewable, has proved to be a promising alternative energy resource to replace conventional fossil fuels. In its continuous production via the fermentation–pervaporation process, hydrophobic polymer membranes such as polydimethylsiloxane (PDMS) have been developed to enrich ethanol from dilute fermentation broth. However, the efficiency of current ethanol recovery via pervaporation is not high enough for large-scale bioethanol production.

近年来，压印光刻技术已成为一种很有前途的能够高速、大批量生产的图形化技术。在这项工作中，我们报告了高度重复性的一步印刷金属纳米立方体。一块单晶银立方体的干膜作为抗蚀剂，一块柔软的聚二甲基硅氧烷印章直接印上最终的图案。使用原子光滑和锐利的刻面纳米立方体，有助于在相邻立方体之间面对面排列，印刷高分辨率和定义良好的图案。它还允许数字控制在几平方毫米的面积上的直线、曲线和复杂结等图案的线宽。在垂直方向上，单粒子晶格和三维纳米图案的长径比高达5。高保真的纳米立方体图形结合先前演示的外延过生长，可以使弯曲(单晶)晶体在室温溶液或高效透明导体。

Abstract(#br)Rheology of polymer solutions suffers from lack of universal model of viscosity applicable across wide range of concentrations. Here we build such a model on the basis of measured viscosity of polydimethylosiloxane (PDMS) in ethyl acetate in a wide range of polymer concentrations: from dilute up to highly concentrated solutions.

本研究提出了一种先进的软生物兼容性传感器，可用于检测血管内壁压力，用于生物医学应用。该装置包括由具有椭球结构的聚二甲基硅氧烷封装的三维电活性聚合物芯元件。该器件在其传感机构经历不同压力时产生电压输出，从而产生不同取向的形变。因此，它可以用来检测不同刚度值的内壁所受的压力。输出电压是由器件感应机构所经历的应变引起的，不需要任何外部电源。核心部件是由离子聚合物-金属复合材料制成的，具有独特的中空设计；它允许导管穿过，核心部件可以锚定在导管上的任意位置。我们还证明，所制作的装置可以与医学上使用的经皮血管成形术球囊导管集成，形成智能传感模块。该模块可以检测到血管模体内壁周围不同程度的脂肪堆积。讨论了利用所研制的装置获得的信号来评价容器的堵塞和刚度。

Abstract(#br)Zeta potential of PDMS-liquid interface is an important parameter for generating electroosmotic flow in a PDMS microchannel. In this paper, the zeta potentials of a PDMS slab in contacting with electrolyte solutions were evaluated with an atomic force microscope (AFM). As a colloidal probe of the AFM approaches to the surface of a PDMS slab in an electrolyte solution, a force curve is obtained and used to calculate the zeta potential of the PDMS.

Abstract(#br)Environmental fate, behavior and effects of hazardous organic compounds have recently received great attention in diverse environmental phases, including water, atmosphere, soil and sediment. Considering polydimethylsiloxane (PDMS) fibers were validated for the wide application in the determination of partition behavior in passive sampling, in this work, several in silico models were established to predict PDMS-water ( K PDMS-w ), PDMS-air ( K PDMS-a ) and PDMS-seawater partition coefficients ( K PDMS-sw ) of diverse chemicals.