Pakakhala mliri, vuto lamadontho othimbirira m'maso ku ofesi ya dokotala limakhala lalikulu

Ma polima amateteza utsi womwe ungakhale wowopsa mukamacheza ndi mano
Pakakhala mliri, vuto lamadontho othimbirira m'maso ku ofesi ya dokotala limakhala lalikulu
M'nyuzipepala yomwe idasindikizidwa sabata ino mu Physics of Fluids, yolembedwa ndi AIP Publishing, Alexander Yarin ndi anzawo adazindikira kuti mphamvu ya chida chogwedezera kapena chobowolera mano sichikugwirizana ndi ma viscoelastic a ma polima owerengera chakudya, monga polyacrylic acid, yomwe amagwiritsira ntchito ngati chosakanizira chochepa chothirira madzi m'mano.

Zotsatira zawo zinali zodabwitsa. Sikuti kusakanikirana pang'ono kwama polima kumathetseratu kutulutsa mphamvu zamagetsi, koma kunatero mosavutikira, kuwonetsa fizikiya yofunika kwambiri ya polima, monga kusintha kolowera, komwe kunakwaniritsa cholinga chake bwino.

Anayesa ma polima awiri ovomerezeka a FDA. Polyacrylic acid inakhala yothandiza kwambiri kuposa xanthan chingamu, chifukwa kuwonjezera pa kukopa kwake kwakukulu (kutanuka kwambiri pakatambasula), idawulula kukhuthala kotsika, komwe kumapangitsa kupopera mosavuta.

"Chomwe chinali chodabwitsa ndikuti kuyesera koyamba mu labu yanga kudatsimikizira mfundoyi," adatero Yarin. "Zinali zodabwitsa kuti zida izi zimatha kupondereza komanso kupondereza kuwononga mphamvu ndi zida zamano, ndimphamvu zazikulu zopanda mphamvu. Komabe, mphamvu zotanuka zopangidwa ndi zowonjezera zowonjezera polima zinali zamphamvu kwambiri. ”

Kafukufuku wawo adalemba kuphulika kwamphamvu kwamatumba amadzi omwe amaperekedwa kumano ndi m'kamwa komwe chida chamano chimathandizira. Utsi wopopera womwe umatsagana ndi kupita kwa dotolo wamankhwala ndi chifukwa cha madzi omwe akukumana ndi kugwedezeka mwachangu kwa chida kapena mphamvu ya centrifugal yoboola, yomwe imaphulitsa madzi m'madontho ang'onoang'ono ndikuwayendetsa.

Kusakanikirana kwa polima, kugwiritsidwa ntchito kuthirira, kupondereza kuphulika; m'malo mwake, ma macromolecule a polima omwe amatambasula ngati zingwe za labala amaletsa kutulutsa madzi. Pamene nsonga ya chida chogwedezekera kapena choboolera mano chilowa mu njira yothetsera polima, njirayo imalumikiza mu zingwe zonga njoka, zomwe zimakokedwa kumapeto kwa chida, kusintha mphamvu zomwe zimawonedwa ndi madzi oyera m'mano.

“Madontho akafuna kutuluka m'thupi lamadzi, mchira wake umatambasulidwa. Ndipamene mphamvu zotanuka zomwe zimakhudzana ndikusintha kwa ma polima macromolecule zimayamba, "adatero Yarin. Amatsitsa kutalika kwa mchira ndipo amakokera madontho kumbuyo, zomwe zimalepheretsa kuuluka kwamafunde. ”

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Nkhani ya Nkhani:

Zida zoperekedwa ndi American Institute of Physics. Chidziwitso: Zolemba zitha kusinthidwa kalembedwe ndi kutalika