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生物聚合物国会2018:Electromachanical和蠕变行为的支链淀粉水凝胶:交联剂和电场强度的影响——Kochakorn Saeaeh——朱拉隆功大学

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支链淀粉是一种非离子多糖来自黑酵母的发酵培养基。由于其无毒,non-mutagenic、non-immunogenic non-carcinogenic,和无味的属性,他们一直追究生物医学应用,包括组织工程,有针对性的药物/基因传递和伤口愈合。此外,支链淀粉是一种有趣的材料发展的一个新的聚合物驱动器与改善现有触发属性。在这部作品中,纸浆制备使用钠trimetaphosphate (STMP)作为水凝胶的交联剂形成。交联的影响量和电场强度对机电性能研究。储能模量(G)的交联剂的增加而增加。由于电场强度效应,存储模块在低电场强度下降。另一方面,在高电场强度增加的存储模块。此外,存储模块和损失模块更改为蠕变柔量通过释放光谱和光谱滞后。遵守Pulane水凝胶随数量的增加而降低交联剂。 In the case of electric field strength, the creep compliance initially increased at low electric field strength and decreased at high electric field strength, indicating that two competing mechanisms are involved. An electric field surrounds an electric charge. Electric and magnetic fields are a manifestation of an electromagnetic force, one of the four basic forces (or interactions) of nature. Electric fields are important in many areas of physics and are exploited practically in electrical engineering. The SI unit for electric field is volt per meter (V / m), which corresponds to the Newton equivalent per coulomb (N / C) in the SI system. The basic theory of a new drive concept based on hydrogel core matrix composites (H-FMC) is presented. A key principle that emphasizes the operation of the H-FMC drive is that the three-dimensional swelling of the hydrogel is partially limited to improve the amount of useful work. The partial limitation applies to the hydrogel with a flexible matrix composition (FMC) that reduces the volume expansion of the hydrogel while it swells. This limitation serves to increase the fixed charge density and the consequent osmotic pressure, which is the driving force for activation. In addition, for some FMC fiber orientations, the Poisson ratio of the anisotropic FMC laminate converts previously unused hydrogel swelling in the radial and circumferential directions into useful axial strains. The potential benefit of the H-FMC concept in terms of hydrogel drive performance is demonstrated by comparing force curves - and evaluating improvements in usable actuation work. The model used to achieve these pairs of chemical and electrical components is represented by Nernst Planck and Poisson equations, as well as a linear elastic mechanical material involving bounded geometric nonlinearities. The H-FMC concept has been found to achieve usable drive improvements of 1500% compared to bare hydrogel performance. A parametric study is also performed to determine the influence of different FMC design parameters on the trigger-free load and voltage blocking. A comparison with other drive concepts is also included. (paper). Epidermal pH is a sign of the physiological state of the skin. For example, wound pH can be associated with angiogenesis, protease activity, bacterial infection, and so on. Chronic incurable wounds are known to have an elevated alkaline environment, while the healing process takes place more easily in an acidic environment. Thus, dermal patches that are capable of continuous pH measurement can be used as a care system to monitor skin diseases and the wound healing process. Here, pH-responsive hydrogel fibers are presented that can be used for long-term monitoring of the condition of the epidermis. Dyes that respond to pH are loaded into mesoporous microparticles and incorporated into hydrogel fibers using a microfluidic spinning system. Manufactured microfibers that are responsive to pH are flexible and can create an even contact with the skin. The response of pH-sensitive fibers with different compositions and thicknesses is characteristic. The proposed technique is extensive and can be used to make hydrogel-based wound dressings with clinically relevant dimensions. Images of pH sensing fibers during real-time pH measurement can be captured with a smart camera for convenient on-site reading. With the help of image processing, it is possible to extract a quantitative pH map of hydrogel fibers and underlying tissue. A developed skin dressing can act as an aid to monitor the wound healing process. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Kochakorn Saeaeh

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