Kedu ka esi achọpụta ọdịnaya ash nke hydroxypropyl methylcellulose?

Ọdịnaya ntu bụ ihe ngosi dị mkpahydroxypropyl methylcellulose. Ọtụtụ ndị ahịa na-ajụkarị mgbe ha ghọtara hydroxypropyl methylcellulose: kedu uru ash bara? Hydroxypropyl methylcellulose nwere obere ntụ ntụ pụtara ịdị ọcha dị elu; cellulose nwere nnukwu ntụ ntụ pụtara na enwere ọtụtụ adịghị ọcha na ya, nke ga-emetụta mmetụta eji eme ihe ma ọ bụ mee ka ọnụọgụ nke mgbakwunye. Mgbe ndị ahịa na-ahọrọ hydroxypropyl methylcellulose, ha na-ejikarị ọkụ na-amụnye ụfọdụ cellulose ozugbo ma gbaa ya ọkụ iji nwalee ọdịnaya ntụ nke cellulose. Mana usoro nchọpụta a abụghị nke sayensị, n'ihi na ọtụtụ ndị na-emepụta ihe na-agbakwunye ihe ọkụ ọkụ na cellulose. N'elu, cellulose nwere ntakịrị ntụ mgbe ọkụ gasịrị, ma na omume, njigide mmiri nke hydroxypropyl methylcellulose adịghị mma.

Yabụ kedu ka anyị ga-esi chọpụta nke ọma ọdịnaya ash nke hydroxypropyl methylcellulose? Ụzọ nchọpụta ziri ezi bụ iji ọkụ muffle chọpụta.

Akụrụngwa Analytical itule, elu okpomọkụ muffle ọkụ, ọkụ ọkụ.

Usoro nnwale:

1) Nke mbụ, tinye 30ml poselin crucible n'ime ọkụ muffle dị elu ma gbaa ya ọkụ na (500 ~ 600) Celsius maka nkeji 30, mechie ọnụ ụzọ ọkụ ahụ iji belata okpomọkụ n'ime ọkụ ahụ n'okpuru 200 ° C, wee were ya. wepụ ihe mkpuchi ahụ ma bugharịa ya na onye na-ekpo ọkụ ka ọ dị jụụ (20 ~ 30) min, na-atụ.

2) Ibu 1.0 g nkehydroxypropyl methylcellulosena ntule nyocha, tinye ihe nlele a tụrụ atụ n'ime ite ọkụ, wee tinye crucible nke nwere ihe nlele ahụ na ọkụ eletrik maka carbonization, dị jụụ n'ime ụlọ, tinye sulfuric acid (0.5-1.0) ml, tinye ya na ọkụ ọkụ maka ọkụ eletrik. carbonization zuru oke. Mgbe ahụ gaa n'ihu ọkụ ọkụ ọkụ dị elu, gbaa ọkụ na (500 ~ 600) ℃ maka awa 1, gbanyụọ ọkụ ọkụ ọkụ ọkụ dị elu, mgbe ọkụ ọkụ na-adaba n'okpuru 200 ℃, wepụ ya ma tinye ya na desiccator. ka ọ dị jụụ (20 ~ 30) nkeji, wee tụọ ya na nguzozi nyocha.

A na-agbakọ ihe fọdụrụ mgbako mgbako dịka usoro (3):

m2-m1

Ihe fọdụrụ mgbanye (%) = ×100………………………………(3)

m

Na usoro: m1 - uka nke crucible efu, na g;

m2 - uka nke fọdụrụ na crucible, na g;

m - oke nke ihe nlele, na g.