Studies on effect of temperature on carbonization of silk (Bombyx mori) and its application as proximity sensor

IF 3.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Carbon Trends Pub Date : 2023-11-24 DOI:10.1016/j.cartre.2023.100314

Shubhanth Jain , R.V. Prajwal , V. Vedavyas , S. Vishwas , Govindaraj Achutharao

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Abstract

Silk, a pyroprotein with its unique micro-structural features comprises of soft amorphous

regions containing compact

-sheet crystals resulting in its potent characteristics. Annealing in inert atmosphere causes carbonization followed by graphitization of these stable

-sheet-rich silk fibroins (SFs). Here we carry out systematic studies of annealed silk fibroin (Bombyx mori) in the temperature range of 200-1200 °C by various analytical techniques. Herein the structural changes in SFs at different annealing temperature have been discussed using Raman, FTIR, XPS, XAES, SEM, XRD characterization techniques. Notably XPS and XAES studies were executed to examine the influence of sp²/sp³ ratio and the presence of hetero-atom on D-parameter value in silk

-sheet material on gradual increase in annealing temperature. The mechanical properties of SFs were measured using UTM. The application of carbonized silk fibroins (CSF) as a proximity sensor is also investigated and proposed as a probable active material.

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温度对家蚕炭化的影响及其在接近传感器中的应用研究

蚕丝是一种火蛋白，具有独特的微观结构特征，由含有致密片状晶体的软无定形区域组成，从而具有强大的特性。在惰性气氛中退火会导致这些稳定的富含薄片的丝素(SFs)碳化，然后是石墨化。本文采用多种分析技术，对200-1200℃温度范围内的退火蚕丝蛋白(家蚕)进行了系统的研究。本文采用拉曼光谱、红外光谱、XPS、XAES、SEM、XRD等表征技术研究了不同退火温度下SFs的结构变化。在退火温度逐渐升高的情况下，采用XPS和XAES研究了sp2/sp3比和杂原子的存在对丝片材料d参数值的影响。采用UTM法测定了复合材料的力学性能。研究了碳化丝素(CSF)作为接近传感器的应用，并提出了一种可能的活性材料。

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