(PU) Mai Juriya Gajiya, Zafi Mai Tsanani, Mai Warkarwa Da Kai Polyurethane Elastomer: An ƙera shi ta hanyar hanyar sadarwa mai daidaitawa ta Dynamic Covalent bisa ga Ascorbic Acid

Masu bincike sun ƙirƙiro wani sabon elastomer polyurethane wanda aka samo daga ascorbic acid wanda ke da alaƙa da tsarin daidaitawa na covalent (A-CCANs). Ta hanyar amfani da tasirin haɗin gwiwa na keto-enol tautomerism da haɗin carbamate mai ƙarfi, kayan yana samun halaye na musamman: zafin jiki na ruɓewar zafi na 345 °C, matsin karyewa na 0.88 GPa, ƙarfin matsi na 268.3 MPa (shaƙar kuzari na 68.93 MJ·m⁻³), da kuma ragowar nau'in da ke ƙasa da 0.02 bayan zagayowar 20,000. Hakanan yana nuna warkarwa da kansa cikin daƙiƙa kaɗan da ingancin sake amfani da shi har zuwa 90%, yana ba da mafita mai nasara don aikace-aikace a cikin na'urori masu wayo da kayan gini.

Wannan bincike mai zurfi ya gina hanyar sadarwa mai daidaitawa ta covalent (A-CCANs) ta amfani da ascorbic acid a matsayin tubalin ginin asali. Ta hanyar keto-enol tautomerism da aka tsara daidai da haɗin carbamate mai ƙarfi, an ƙirƙiri wani elastomer polyurethane mai ban mamaki. Kayan yana nuna juriyar zafi irin ta polytetrafluoroethylene (PTFE) - tare da zafin jiki na rugujewar zafi har zuwa 345 °C - yayin da yake nuna cikakken daidaito na tauri da sassauci: ainihin damuwa ta karyewa na 0.88 GPa, da ikon kula da damuwa na 268.3 MPa a ƙarƙashin matsin lamba na 99.9% yayin da yake shan kuzari 68.93 MJ·m⁻³. Har ma mafi ban sha'awa, kayan yana nuna ragowar nau'in ƙasa da 0.02% bayan zagayowar injina 20,000, yana warkar da kansa cikin daƙiƙa ɗaya, kuma yana cimma ingantaccen sake amfani da kashi 90%. Wannan dabarar ƙira, wadda ta cimma ma'anar "samun ƙafar kifi da ta beyar," tana samar da mafita mai juyi ga aikace-aikace kamar su kayan sawa masu wayo da kayan sanya matashin kai na sararin samaniya, inda ƙarfin injina da dorewar muhalli suke da matuƙar muhimmanci.