Nzira yekuona sei madota e hydroxypropyl methylcellulose?

Madota emukati chiratidzo chakakosha chehydroxypropyl methylcellulose. Vatengi vazhinji vanowanzobvunza kana vachinzwisisa hydroxypropyl methylcellulose: chii chakakosha madota? Hydroxypropyl methylcellulose ine madota madiki zvinoreva kuchena kwepamusoro; cellulose ine madota makuru zvinoreva kuti kune zvakawanda zvakasvibiswa mairi, izvo zvinokanganisa kushandiswa kwekushandisa kana kuwedzera huwandu hwekuwedzera. Kana vatengi vakasarudza hydroxypropyl methylcellulose, vanowanzo vheneka imwe cellulose nemoto voipisa kuti vaedze madota ari muselulosi. Asi iyi nzira yekuona haina hunyanzvi hwesainzi, nekuti vagadziri vazhinji vanowedzera zvinomhanyisa kupisa kune cellulose. Pamusoro, iyo cellulose ine madota mashoma mushure mekupisa, asi mukuita, kuchengetwa kwemvura yehydroxypropyl methylcellulose hakuna kunaka.

Saka isu tinofanira kuona sei nemadota emukati mehydroxypropyl methylcellulose? Iyo chaiyo yekuona nzira ndeye kushandisa muffle furnace kuona.

Instrument Analytical balance, high tembiricha muffle furnace, electric furnace.

Kuedza maitiro:

1) Chekutanga, isa 30ml porcelain crucible mune yakakwirira-tembiricha muffle furnace uye upise pa (500 ~ 600) °C kwemaminetsi makumi matatu, vhara gedhi rechoto kuti udzikise tembiricha muchoto kusvika pasi pe200 ° C, wozotora crucible uye uifambise kune inotonhorera (200, ~ 30 dhigirii).

2) Kuyera 1.0 g yehydroxypropyl methylcellulosepachiyero chekuongorora, isa sampu yakayerwa mucrucible, wobva waisa crucible ine sample pachoto chemagetsi checarbonization, inotonhorera kusvika kukamuri tembiricha, wedzera sulfuric acid (0.5-1.0) ml, uye woiisa pachoto chemagetsi kuti carbonization izere. Wobva waenda kune yakakwira tembiricha muffle furnace, pisa pa (500 ~ 600) ℃ kweawa imwe, dzima simba rekushisa kwakanyanya muffle furnace, kana tembiricha yechoto ichidonha pasi pe200 ℃, ibudise uye uiise mu desiccator kuti itonhore (20 ~ 30) maminetsi, uye wobva wayera chiyero.

Calculation Ignition residue inoverengerwa zvinoenderana neformula (3):

m2-m1

Ignition residue (%) = ×100…………………………(3)

m

Muchigadziro: m1 - kuwanda kwe crucible isina chinhu, mu g;

m2 - huwandu hwezvasara uye crucible, mu g;

m - kuwanda kwemuenzaniso, mu g.