Kedu ihe ndị na-emetụta nnyefe ìhè nke hydroxypropyl methylcellulose?

Isi ihe ndị a na-emetụta nnyefe ìhè nke hydroxypropyl methylcellulose:

1. Ọdịdị nke ihe ndị e ji arụ ọrụ.

Nke abụọ, mmetụta nke alkalizim.

3. Nhazi usoro

4. Oke nke ihe mgbaze

5. Mmetụta nke nnọpụiche

Ụfọdụ ngwaahịa na-acha ígwé ojii dị ka mmiri ara ehi mgbe agbazechara ya, ụfọdụ na-acha ọcha dị ka mmiri ara ehi, ụfọdụ na-acha odo odo, ụfọdụ na-achakwa ọcha ma doo anya… Iji dozie nsogbu ahụ, gbanwee site na isi ihe ndị a. Mgbe ụfọdụ acetic acid nwere ike imetụta nnyefe ọkụ nke ukwuu. Ọ kacha mma iji acetic acid mgbe agbazechara ya. Mmetụta kachasị bụ ma mmeghachi omume ahụ a na-akpali n'otu aka ahụ na ma usoro ahụ ọ kwụsiri ike (ụfọdụ ihe nwere mmiri mmiri na ọdịnaya ahụ adịghị agbanwe agbanwe, dị ka ihe mgbaze eji eme ihe maka imegharị ihe). N'ezie, enwere ọtụtụ ihe na-emetụta. Ọ bụrụ na akụrụngwa ahụ kwụsiri ike ma ndị na-arụ ọrụ ahụ nwere ọzụzụ nke ọma, mmepụta ahụ kwesịrị ịdịgide nke ọma. Mgbasa ọkụ agaghị agafe oke nke ±2%, a ga-ejikwa nhazi nnọchi nke otu ndị nnọchi anya nke ọma. Kama ịdị otu, nnyefe ọkụ ga-adị mma n'ezie.

Ihe Ndị Na-emetụta Viscosity nke Hydroxypropyl Methyl Cellulose

Hydroxypropyl methylcellulose nke nwere oke viscosity enweghị ike imepụta cellulose dị elu naanị site na iji vacuum na nnọchi nitrogen na mmepụta. N'ozuzu, enweghị ike ijikwa mmepụta nke cellulose dị elu na China. Agbanyeghị, ọ bụrụ na enwere ike itinye ngwaọrụ nha oxygen n'ime ketulu ahụ, enwere ike ijikwa mmepụta nke viscosity ya site na aka.

emebere ya. Na mgbakwunye, n'ịtụle ọsọ mgbanwe nke nitrogen, ọ dị mfe imepụta ngwaahịa viscosity dị elu n'agbanyeghị otú sistemụ ahụ si ghara ikuku. N'ezie, oke nke polymerization nke owu a nụchara anụcha dịkwa oke mkpa. Ọ bụrụ na nke ahụ anaghị arụ ọrụ, mee ya na njikọ hydrophobic. E nwere ndị nnọchi anya njikọ na mpaghara a na China. Ụdị onye nnọchi anya njikọ ịhọrọ nwere nnukwu mmetụta na arụmọrụ nke ngwaahịa ikpeazụ. Oxygen fọdụrụ na reactor na-akpata mmebi nke cellulose na mbelata nke ibu molekul, mana oxygen fọdụrụ nwere oke, ma ọ bụrụhaala na molekul ndị gbajiri agbaji ejikọtara, ọ naghị esiri ike ime viscosity dị elu. Agbanyeghị, ọnụego saturation nwere ọtụtụ ihe jikọrọ ya na ọdịnaya nke hydroxypropyl. Ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụahịa, mana ha achọghị ịbawanye ọdịnaya nke hydroxypropyl, yabụ àgwà ahụ enweghị ike iru ọkwa nke ngwaahịa mba ọzọ yiri ya. Ọnụego njigide mmiri nke ngwaahịa ahụ nwere mmekọrịta dị mma na hydroxypropyl, mana maka usoro mmeghachi omume niile, ọ na-ekpebikwa ọnụego njigide mmiri ya, mmetụta alkalization, oke nke methyl chloride na propylene oxide, ntinye alkali na njigide mmiri. Oke ya na owu a nụchara anụcha na-ekpebi arụmọrụ nke ngwaahịa ahụ.