Mokhoa oa ho lemoha molora oa hydroxypropyl methylcellulose joang?

Likahare tsa molora ke sesupo sa bohlokoa sahydroxypropyl methylcellulose. Hangata bareki ba bangata ba botsa ha ba utloisisa hydroxypropyl methylcellulose: boleng ba molora ke bofe? Hydroxypropyl methylcellulose e nang le molora o monyenyane o bolela bohloeki bo phahameng; cellulose e nang le molora o moholo o bolela hore ho na le litšila tse ngata ho eona, tse tla ama phello ea tšebeliso kapa ho eketsa palo ea ho eketsoa. Ha bareki ba khetha hydroxypropyl methylcellulose, hangata ba bonesa cellulose ka ho toba ka mollo ebe ba e chesa ho lekola molora oa selulose. Empa mokhoa ona oa ho lemoha ha o lumellane le saense haholo, hobane bahlahisi ba bangata ba eketsa li-accelerants tse tukang ho selulose. Ka holim'a selulose e na le molora o fokolang haholo ka mor'a ho chesa, empa ha e le hantle, ho boloka metsi a hydroxypropyl methylcellulose ha ho molemo haholo.

Joale re lokela ho lemoha joang ka nepo litaba tsa molora oa hydroxypropyl methylcellulose? Mokhoa o nepahetseng oa ho lemoha ke ho sebelisa sebōpi sa muffle ho lemoha.

Instrument Analytical balance, mocheso o phahameng oa muffle sebōpi, sebōpi sa motlakase.

Mokhoa oa teko:

1) Ntlha ea pele, kenya 30ml porcelain crucible ka sebōping sa mocheso o phahameng oa mocheso 'me u se chese ho (500 ~ 600) °C ka metsotso e 30, koala heke ea sebōpi ho theola mocheso ka tlas'a 200 ° C, ebe u nka. ntša crucible 'me u e ise ho desiccator ho pholile (20 ~ 30) min, e boima.

2) Boima ba 1.0 g yahydroxypropyl methylcelluloseka tekanyo ea tlhahlobo, beha sampuli e lekantsoeng ka crucible, ebe u beha crucible e nang le sampuli ka sebōping sa motlakase bakeng sa carbonization, e pholileng ho ea mocheso oa kamore, eketsa sulfuric acid (0.5-1.0) ml, 'me ue behe sebōping sa motlakase bakeng sa carbonization e feletseng. Ebe u fallela sebōping sa mocheso o phahameng oa mocheso, chesa ho (500 ~ 600) ℃ bakeng sa 1 hora, tima matla a sebōpi sa mocheso o phahameng oa mocheso, ha mocheso oa sebōpi o theoha ka tlase ho 200 ℃, o ntše 'me u o behe ka har'a desiccator. ho pholisa (20 ~ 30) mets, ebe o lekanngoa ka tekanyo ea tlhahlobo.

Palo Masala a ho besa a baloa ho latela foromo (3):

m2-m1

Masala a ho tima (%) = ×100…………………………(3)

m

Ka mokhoa: m1 - boima ba crucible e se nang letho, ka g;

m2 - boima ba masala le crucible, ka g;

m – boima ba sampole, ka g.