difference between muga cocoons and eri cocoons
Answers
Wild silks are often extremely durable and have many advantages over the domesticated silk. In this study, three kinds of wild silks—Indian Antheraea mylitta (Tussar), Antheraea assama (Muga), and Philosamia ricini (Eri) silkworm cocoons were successfully degummed and their thermal properties were studied comparatively with domesticated Chinese mulberry (Bombyx mori) silkworm cocoons and fibers. Advanced thermal analysis methods, such as differential scanning calorimetry (DSC) and temperature-modulated DSC were utilized to identify glass transition temperatures (T g), heat capacity increments at T g, and degradation temperatures of these silk materials. In addition, the bound water contents and the thermal degradation mechanisms of different silk systems were also quantified using thermogravimetric analysis. Compared with the mulberry silk materials, wild silk materials showed higher thermal stabilities, and variable degradation profiles. These comparative methods would offer a new pathway to understand the physical properties of silk-based biomaterials, such as their tunable thermal, mechanical, optical, and electrical properties. And it could provide useful insights for the development of new silk-based medical devices and sutures with controllable biological functions in the future.
Comparative thermal analysis of Eri, Mori, Muga, and Tussar silk cocoons and fibroin fibers
Answer:
Eri cocoons are wrapped loosely in a permeable fabric, submerged for an hour in an alkaline solution made up of 10–12g of soap and 2-4g of soda per litre of water, and then bolied. The cocoons are then cleaned and reboiled for 15 to 30 minutes in new water. Muga cocoons are created with 350-550 m of continuous thread.
Explanation:
Wild silks generally offer a great deal of durability and benefits over cultivated silk. Three different types of wild silk—Indian Antheraea mylitta (Tussar), Antheraea assama (Muga), and Philosamia ricini (Eri) silkworm cocoons—were successfully degummed for this study, and the thermal characteristics of each were compared to those of domesticated Chinese mulberry (Bombyx mori) silkworm cocoons and fibres. These silk materials were studied to determine their glass transition temperatures (T g), heat capacity increases at T g, and degradation temperatures using advanced thermal analysis techniques such differential scanning calorimetry (DSC) and temperature-modulated DSC. Thermogravimetric analysis was also used to quantify the bound water contents and heat degradation processes of several silk systems. Wild silk materials had better thermal stabilities and varied mechanical properties as compared to mulberry silk materials.deterioration patterns. These comparison techniques would present a fresh way to comprehend the tunable thermal, mechanical, optical, and electrical characteristics of silk-based biomaterials. Additionally, it could offer helpful information for the future design of innovative silk-based medical devices and sutures with programmable biological capabilities.
Thermal comparison between fibroin fibres with Eri, Mori, Muga, and Tussar silk cocoons