Preparation And Application Of Stretchable Modified Silver Nanowires/Polymer Composite Conductive Material

Transparent conductive film has become an indispensable part of human life and technological development.With the development of science and technology,flexible stretchable,and wearable electronic devices are gradually into our daily lives.As a promising material for the preparation of transparent conductive films,silver nanowires attract more and more attention nowadays,due to their flexibility and stretchability.In this dissertation,the synthesis of silver nanowires by polyol method are systematically investigated.The morphologies and sizes can be controlled via the variations of PVP molecular weights,PVP to silver nitrate ratios,reaction time,ferric chloride concentrations,stirring rates and reaction temperaturesHigh-aspect-ratio silver nanowires with a length of nearly 200 ?m,a diameter of 70 to 120 nm and an aspect ratio of more than 2000 were synthesized by low-temperature synthesis.Ultrafine silver nanowires with the maximum length of 40 ?m and the minimum diameter of 20 nm are produced under anaerobic conditions.Silver nanowire/PI transparent and conductive films were fabricated,which can achieve a transmittance of 81.5% at the sheet resistance of 12.6 Ohm/sq.The resistance of the film was slightly increased after 50 bends,and it did not change anymore after 1000 bends.The heating film can reach the high temperature of 96 ? under the voltage of 4 V.Meanwhile,the heating performance of the device is stable.The surface of silver nanowires was modified by n-dodecanethiol.A stretchable silver nanowire / PDMS conductive film was prepared,and the transmittance of the sample is about 55.9% at 550 nm.The electrical properties of the device were stable and the maximum rate of change of resistivity was less than 25% at the stretching range of 5% and 10%.