Focus on Cellulose ethers

Ihe na-emetụta Mbufe ọkụ nke Hydroxypropyl Methyl Cellulose

Hydroxypropyl methylcellulose nwere viscosity dị elu enweghị ike imepụta cellulose dị elu naanị site na ikpochapụ na nnọchi nitrogen na mmepụta. N'ozuzu, a pụghị ịchịkwa mmepụta nke cellulose dị elu na China. Otú ọ dị, ọ bụrụ na a pụrụ itinye ihe e ji atụ ihe ikuku oxygen n'ime ketulu, a pụrụ ịchịkwa mmepụta nke viscosity ya nke ọma. Tụkwasị na nke ahụ, n'ịtụle ọsọ ngbanwe nke nitrogen, ọ dị mfe ịmepụta ngwaahịa viscosity dị elu n'agbanyeghị otú ikuku si dị. N'ezie, ogo polymerization nke owu a nụchara anụcha dịkwa oke mkpa. Ọ bụrụ na nke ahụ anaghị arụ ọrụ, mee ya na njikọ hydrophobic. Enwere ndị ọrụ otu na mpaghara a na China. Kedu ụdị onye na-ahụ maka mkpakọrịta ịhọrọ nwere mmetụta dị ukwuu na arụmọrụ nke ngwaahịa ikpeazụ.

Mgbasa ọkụ nke hydroxypropyl methylcellulose na-emetụta isi ihe ndị a:

1. Ogo nke akụrụngwa.

2. Mmetụta nke alkalization.

3. Usoro nhazi.

4. Oke nke ihe mgbaze.

5. Neutralizing mmetụta.

Oxygen fọdụrụnụ dị n'ime ọkụ ọkụ ga-eme ka mmebi nke cellulose na mbelata ịdị arọ nke molekụla, ma ikuku oxygen fọdụrụnụ nwere oke, ma ọ bụrụ na ọ bụ naanị ijikọ ụmụ irighiri ihe mebiri emebi, na-eme ka viscosity dị elu dị mfe. Agbanyeghị, ọkwa mmiri juru eju nwekwara njikọ siri ike na ọkwa hydroxyproline. Ụfọdụ ụlọ ọrụ na-achọ naanị ibelata ọnụ ahịa na ọnụahịa, na ha achọghị ịbawanye ọdịnaya nke hydroxyproline ka àgwà ahụ ghara ịgafe ọkwa ngwaahịa ndị a na-emepụta na mba ọzọ. The nchebe larịị nke ngwaahịa metụtara mmiri phenol, ma n'ozuzu, mmeghachi omume usoro na-ekpebikwa ya ichebe ogo, ruru nke alkali, methyl chloride na propylene oxide, ịta nke alkali na ruru nke mmiri na owu na-ekpebi ya arụmọrụ. .


Oge nzipu: Eprel-23-2023
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