Kedu otu esi achọpụta ọdịnaya ntụ nke hydroxypropyl methylcellulose?

Ọdịnaya ntụ bụ ihe dị mkpa na-egosihydroxypropyl methylcelluloseỌtụtụ ndị ahịa na-ajụkarị mgbe ha ghọtara hydroxypropyl methylcellulose: kedu uru ntụ ahụ? Hydroxypropyl methylcellulose nwere obere ntụ pụtara ịdị ọcha dị elu; cellulose nwere nnukwu ntụ pụtara na enwere ọtụtụ ihe na-adịghị ọcha na ya, nke ga-emetụta mmetụta ojiji ma ọ bụ mee ka ọnụọgụ mgbakwunye dịkwuo elu. Mgbe ndị ahịa na-ahọrọ hydroxypropyl methylcellulose, ha na-etinyekarị ụfọdụ cellulose ọkụ ozugbo ma gbaa ya ọkụ iji nwalee ọdịnaya ntụ nke cellulose. Mana usoro nchọpụta a ezighi ezi na sayensị, n'ihi na ọtụtụ ndị nrụpụta na-agbakwụnye ihe na-eme ka ọkụ na cellulose. N'elu elu, cellulose enweghị obere ntụ mgbe ọ gbasịrị ọkụ, mana n'omume, njigide mmiri nke hydroxypropyl methylcellulose adịghị mma.

Kedụ ka anyị ga-esi chọpụta nke ọma ihe dị n'ime ntụ hydroxypropyl methylcellulose? Ụzọ kacha mma isi chọpụta ya bụ iji igwe nkụchi muffle chọpụta ya.

Ngwa nyocha nguzozi, ọkụ muffle dị elu, ọkụ eletrik.

Usoro nnwale:

1) Nke mbụ, tinye ihe mkpuchi porcelain nke dị 30ml n'ime ọkụ muffle dị oke ọkụ ma kpọọ ya ọkụ na (500-600) Celsius ruo nkeji iri atọ, mechie ọnụ ụzọ ọkụ ahụ iji belata okpomọkụ dị n'ime ọkụ ahụ ruo n'okpuru 200°C, wee wepụ ihe mkpuchi ahụ wee bufee ya na ihe na-ekpo ọkụ ka ọ jụọ oyi (20-30) nkeji, na-atụ ya.

2) Ibu 1.0 g nkehydroxypropyl methylcelluloseN'elu nguzozi nyocha, tinye ihe nlele ahụ n'ime ihe mkpuchi, wee tinye ihe mkpuchi ahụ nwere ihe nlele ahụ n'elu ọkụ eletrik maka kabonization, jụọ oyi ruo na okpomọkụ ụlọ, tinye sulfuric acid (0.5-1.0) ml, wee tinye ya na ọkụ eletrik maka kabonization zuru oke. Mgbe ahụ gaa na ọkụ muffle dị elu, gbaa ọkụ na (500~600) ℃ maka otu awa, gbanyụọ ike nke ọkụ muffle dị elu, mgbe okpomọkụ ọkụ ahụ dara n'okpuru 200 ℃, wepụ ya ma tinye ya na desccator ka ọ dị jụụ (20~30) nkeji, wee tụọ ya na nguzozi nyocha.

Ngụkọta A na-agbakọ ihe fọdụrụ n'ọkụ dịka usoro (3) si dị:

m2-m1

Ihe fọdụrụ n'ọkụ (%) = ×100………………………(3)

m

N'ime usoro a: m1 - oke nke ihe mkpofu efu, na g;

m2 - oke nke ihe fọdụrụ na ihe a na-akpọ crucible, na g;

m - oke nke ihe nlele ahụ, na g.