It is rare that a biomaterial possess all ideal properties for scaffold fabrication. Synthetic and natural materials are used in the fabrication of scaffolds for tissue engineering and each of these material groups possesses specific advantages and disadvantages. Synthetic materials can be fabricated with a tailored architecture for specific applications, so they exhibit have pivotal properties (e.g., predictable and reproducible mechanical and physical properties such as tensile strength, elastic modulus, and degradation rate) in tissue engineering, but they have drawbacks including the poor biologically activity and cell attachment as well as they are lack cell recognition sites. Unlike synthetic materials, natural materials are biologically active and typically induce excellent cell attachment, migration and proliferation. Furthermore, they are biodegradable by an enzymatic or hydrolytic mechanism and so allow host cells, over time, to eventually secrete their own extracellular matrix and replace the degraded scaffold.
Compression test were carried out for cube and cylinder specimen using steel and Recron 3S fibres. A total of 18 cube specimen using steel fibres were prepared for the testing at the age of 7 and 28 days. Another 18 cube specimen was prepared using Recron 3S fiber. Also 36 cylinder specimens were casted using both fibres for the testing at the age of 7 and 28 days. A cube size of 150 x 150 x 150 mm and cylinder size of 150mm diameter and 300mm length was adopted.
They are mostly water-based. Examples of natural polymers are silk, wool, DNA, cellulose and proteins. Polymerisation Some small molecules join together and make very long molecules called polymers. This process is known as polymerisation. Many polymers are created from chemicals that are obtained from crude oil.
3. Mechanical property testing: The fabricated material is taken in to study for Tensile, Impact and Hardness measurements. Tensile strength was calculated using a universal testing machine. Impact strength is calculated in Impact testing machine and Hardness is calculated in Shore durometer machine. One identical sample was tested for each test and readings were tabulated.
Introduction: The objective for the lab was to determine properties of materials by using a tension test. The properties that were determined was Young’s Modulus, ultimate tensile strength, and yield strength. Three aluminum alloys were tested. The first was the AA 2024 , which is high strength used in aerospace applications. The second specimen was AA 5052, which had low strength, but high ductility.
Resilient flooring: rubber for resilient flooring is from old tires that has been recycled and compressed to form rubber tiles. Wooden flooring: this type of flooring I chose is made from by-product wood. Reusing materials gives us the opportunity to do something that has minimum influence on the environment because we are not extracting new materials and producing more CO2 emissions in fabricating them. All three options equal. 4.
Biodegradable components are applied to replace materials derived from petrochemicals. Polylactic acid (PLA) is one example of biodegradable polymer which applied regularly in the purpose of packaging. The manufacturing of PLA has advantage of the ability to change the physical properties of the polymer through processing methods. PLA is appied for a variation of films, wrappings, and containers (including bottles and cups). Also, BASF markets have a product called Ecovio® (blend of PLA and the company's biodegradable plastic Ecoflex®).
Why use composites? Advantages of Composites The greatest preferred standpoint of present day composite materials is that they are light and also solid. By picking a suitable mix of network and fortification material, another material can be made that precisely meets the necessities of a specific application. Composites likewise give plan adaptability in light of the fact that a large number of them can be formed into complex shapes. The drawback is frequently the cost.
Aramid reinforced polymer composites (ARPCs) 3. Glass fiber reinforcement composites (GFRs) **In each case the fiber is encased in a resin matrix (the continuous phase). **These matrices are usually acrylicepoxyphenolic or polyester resins. Reason for the selection: Because carbon fiber is light and able to increase the strength of the tennis rackets. Reinforcement had impact resistance, stiffness and tensile properties.