hydroxypropyl cellulose (L-HPC) nke nwere obere ihe nnọchite anya bụ ihe sitere na cellulose, polima eke nke a na-ahụ na mgbidi mkpụrụ osisi. A gbanweela L-HPC iji mee ka ọ gbazee nke ọma na ihe ndị ọzọ, na-eme ka ọ bụrụ ihe dị iche iche nwere ọtụtụ ojiji na ụlọ ọrụ ọgwụ, nri, na ihe ịchọ mma.
Hydroxypropylcellulose dị ala (L-HPC) bụ ihe e ji emepụta cellulose dị ala nke agbanweela nke ọma iji melite ike ya na mmiri na ihe mgbaze ndị ọzọ. Cellulose bụ polysaccharide dị larịị nke mejupụtara glucose units nke jupụtara n'okike ma bụrụkwa akụkụ nhazi nke mgbidi sel osisi. A na-emepụta L-HPC site na ịgbanwe cellulose site na kemịkalụ, na-ewebata otu hydroxypropyl iji mee ka ọ gbazee nke ọma ma na-ejigide ụfọdụ ihe ndị a na-achọsi ike nke cellulose.
Nhazi kemịkalụ nke hydroxypropyl cellulose nke nwere obere mgbanwe
Nhazi kemịkalụ nke L-HPC nwere ọkpụkpụ azụ cellulose na otu hydroxypropyl nke ejikọtara na otu hydroxyl (OH) nke otu glucose. Ogo nke nnọchi (DS) na-ezo aka na ọnụọgụgụ nkezi nke otu hydroxypropyl kwa otu glucose na yinye cellulose. Na L-HPC, a na-eme ka DS dị ala iji kwado mmezi ka mma yana ịnọgide na-enwe njirimara dị n'ime nke cellulose.
Njikọ nke hydroxypropyl cellulose nke nwere obere mgbanwe
Mmepụta nke L-HPC gụnyere mmeghachi omume nke cellulose na propylene oxide n'ihu ihe na-akpali alkaline. Mmeghachi omume a na-eme ka e tinye otu hydroxypropyl n'ime agbụ cellulose. Iji nlezianya achịkwa ọnọdụ mmeghachi omume, gụnyere okpomọkụ, oge mmeghachi omume, na ntinye nke ihe na-akpali akpali, dị oke mkpa iji nweta ọkwa nnọchi achọrọ.
Ihe ndị na-emetụta mmiri mmiri
1. Ọkwa nnọchi (DS):
DS ya na-emetụta ike ịgbaze nke L-HPC. Ka DS na-abawanye, ike mmiri nke otu hydroxypropyl na-apụta ìhè nke ọma, si otú a na-eme ka mmiri na ihe mgbaze polar dịkwuo mma.
2. Ibu molekul:
Ibu molekul nke L-HPC bụ ihe ọzọ dị mkpa. Oke ibu molekul L-HPC nwere ike igosi mbelata ike ịgbaze n'ihi mmụba nke mmekọrịta dị n'etiti molekul na njikọ agbụ.
3. Okpomọkụ:
Mmiri na-agbazekarị na-abawanye ka okpomọkụ dị n'ihi na okpomọkụ dị elu na-enye ike karịa iji mebie ike intermolecular ma kwalite mmekọrịta polymer-solvent.
4. uru pH nke ngwọta:
pH nke ihe ngwọta ahụ na-emetụta ionization nke otu hydroxypropyl. N'ọnọdụ ụfọdụ, ịgbanwe pH nwere ike ime ka L-HPC na-agbaze ngwa ngwa.
5. Ụdị ihe mgbaze:
L-HPC na-egosipụta ezigbo ike ịgbaze n'ime mmiri na ihe mgbaze dị iche iche. Nhọrọ nke ihe mgbaze dabere na ngwa akọwapụtara na ihe onwunwe achọrọ nke ngwaahịa ikpeazụ.
Ojiji nke hydroxypropyl cellulose nke a na-eji obere dochie anya
1. Ọgwụ:
A na-ejikarị L-HPC eme ihe n'ọtụtụ ebe n'ụlọ ọrụ ọgwụ dị ka ihe na-ejikọ ihe, ihe na-agbaze ihe na ihe na-ewepụ ihe n'ime mbadamba. Mmiri ya na-agbaze n'ime mmiri afọ na-eme ka ọ dị mma maka iji ọgwụ eme ihe.
2. Ụlọ ọrụ nri:
N'ụlọ ọrụ nri, a na-eji L-HPC eme ihe dị ka ihe na-eme ka ihe sie ike ma na-eme ka ọ sie ike n'ọtụtụ ngwaahịa. Ike ya ịmepụta jel doro anya na-enweghị mmetụta na uto ma ọ bụ agba nke ngwaahịa nri na-eme ka ọ baa uru n'ụdị nri.
3. Ihe ịchọ mma:
A na-eji L-HPC eme ihe ịchọ mma maka ihe ndị na-eme ka ihe nkiri na ihe ndị na-eme ka ọ sie ike. Ọ na-enyere aka ime ka ịdị mma na udidi nke ihe ịchọ mma dịka ude, ude na gel dịkwuo mma.
4. Ngwa mkpuchi:
Enwere ike iji L-HPC mee ihe dị ka ihe mkpuchi ihe nkiri na ụlọ ọrụ ọgwụ na nri iji nye oyi akwa nchekwa maka mbadamba ma ọ bụ ngwaahịa ihe ọṅụṅụ.
Hydroxypropyl cellulose nke nwere obere mgbanwe bụ polima nwere ọtụtụ ọrụ nwere mmụba na-esi na cellulose eke dị na osisi. Njirimara pụrụ iche ya na-eme ka ọ baa uru n'ọtụtụ ụlọ ọrụ gụnyere ọgwụ, nri na ihe ịchọ mma. Ịghọta ihe ndị na-emetụta ike ya dị oke mkpa iji mee ka ojiji ya ka mma n'ọtụtụ ọrụ. Ka nchọpụta na mmepe sayensị polima na-aga n'ihu, L-HPC na ihe ndị yiri ya nwere ike ịchọta ngwa ọhụrụ na nke ọhụrụ n'ọtụtụ ubi.
Oge ozi: Disemba-26-2023