Kodi mungadziwe bwanji kuchuluka kwa phulusa la hydroxypropyl methylcellulose?

Kuchuluka kwa phulusa ndi chizindikiro chofunikira chahydroxypropyl methylcelluloseMakasitomala ambiri nthawi zambiri amafunsa kuti akamvetsetsa hydroxypropyl methylcellulose: kodi phulusa ndi lotani? Hydroxypropyl methylcellulose yokhala ndi phulusa laling'ono imatanthauza kuyera kwambiri; cellulose yokhala ndi phulusa lalikulu imatanthauza kuti pali zinthu zambiri zodetsedwa, zomwe zingakhudze momwe amagwiritsidwira ntchito kapena kuwonjezera kuchuluka kwa zowonjezera. Makasitomala akasankha hydroxypropyl methylcellulose, nthawi zambiri amayatsa cellulose mwachindunji ndi moto ndikuyiwotcha kuti ayesere phulusa la cellulose. Koma njira iyi yodziwira siyogwirizana ndi sayansi, chifukwa opanga ambiri amawonjezera zinthu zoyatsira moto ku cellulose. Pamwamba, cellulose imakhala ndi phulusa lochepa kwambiri ikayaka, koma kwenikweni, kusunga madzi kwa hydroxypropyl methylcellulose sikwabwino kwambiri.

Ndiye kodi tingadziwe bwanji bwino kuchuluka kwa phulusa la hydroxypropyl methylcellulose? Njira yolondola yodziwira ndikugwiritsa ntchito chotenthetsera cha muffle kuti tizindikire.

Kulinganiza bwino kwa zida, ng'anjo yotentha kwambiri, ng'anjo yamagetsi.

Njira yoyesera:

1) Choyamba, ikani chofufumitsa cha porcelain cha 30ml mu ng'anjo yotentha kwambiri ndikuchiwotcha pa (500~600) °C kwa mphindi 30, tsekani chipata cha ng'anjo kuti muchepetse kutentha mu ng'anjo kufika pansi pa 200°C, kenako tulutsani chofufumitsacho ndikuchisunthira ku desiccator kuti chizizire (20~30 min), cholemera.

2) Yesani 1.0 g yahydroxypropyl methylcellulosePa mulingo wowunikira, ikani chitsanzo choyezedwa mu chotenthetsera, kenako ikani chotenthetsera chokhala ndi chitsanzocho pa ng'anjo yamagetsi kuti chiziziritsidwe, chiziziritseni kutentha kwa chipinda, onjezerani sulfuric acid (0.5-1.0) ml, ndikuchiyika pa ng'anjo yamagetsi kuti chiziritsidwe kwathunthu. Kenako pita ku ng'anjo yotenthetsera kwambiri, yatsani pa (500~600) ℃ kwa ola limodzi, zimitsani mphamvu ya ng'anjo yotenthetsera kwambiri, kutentha kwa ng'anjo kukatsika pansi pa 200 ℃, tulutsani ndikuyiyika mu desiccator kuti izizire (20~30 min), kenako muyike pa mulingo wowunikira.

Kuwerengera Zotsalira za kuyatsa zimawerengedwa motsatira fomula (3):

m2-m1

Zotsalira za kuyatsa (%) = ×100……………………(3)

m

Mu fomula: m1 – kulemera kwa chofufumitsa chopanda kanthu, mu g;

m2 - unyinji wa zotsalira ndi zophikira, mu g;

m – kulemera kwa chitsanzo, mu g.