Hydroxyethyl Cellulose (HEC) na hydroxypropyl cellulose (HPC) bụ ihe abụọ a na-ejikarị cellulose eme ihe. Ha nwere ụfọdụ dị iche iche dị ịrịba ama na nhazi, arụmọrụ na ngwa.
1. Chemical Ọdịdị
Hydroxyethyl cellulose (HEC): Hydroxyethyl cellulose na-etolite site na iwebata otu hydroxyethyl (-CH₂CH₂OH) n'ime molekul cellulose. Otu hydroxyethyl na-enye HEC ezigbo solubility na nkwụsi ike.
Hydroxypropyl Cellulose (HPC): A na-etolite hydroxypropyl cellulose site na iwebata otu hydroxypropyl (-CH₂CHOHCH₃) na molekul cellulose. Iwebata otu hydroxypropyl na-enye HPC dị iche iche solubility na viscosity njirimara.
2. Solubility
HEC: Hydroxyethylcellulose nwere ezigbo solubility na mmiri ma nwee ike ịmepụta ngwọta colloidal transperent. Solubility ya dabere na ogo nnọchi nke otu hydroxyethyl (ya bụ ọnụọgụ nke otu hydroxyethyl kwa nkeji glucose).
HPC: Hydroxypropyl cellulose nwere ụfọdụ solubility na ma mmiri na organic solvents, karịsịa na organic mgbaze dị ka ethanol. Solubility nke HPC na-emetụta nke ukwuu site na okpomọkụ. Ka okpomọkụ na-abawanye, solubility ya na mmiri ga-ebelata.
3. Viscosity na rheology
HEC: Hydroxyethyl cellulose nwere nnukwu viscosity na mmiri ma na-egosipụta njirimara nke mmiri mmiri pseudoplastic, ntụgharị ịcha thinning. Mgbe a na-etinye shear, viscosity ya na-ebelata, na-eme ka ọ dị mfe itinye na iji.
HPC: Hydroxypropyl cellulose nwere viscosity dị ntakịrị ma gosipụta pseudoplasticity yiri ya na ngwọta. Ngwọta HPC nwekwara ike mepụta colloids transperent, mana viscosity ha na-adịkarị ala karịa HEC.
4. Mpaghara ngwa
HEC: A na-eji hydroxyethyl cellulose eme ihe na mkpuchi, ihe ụlọ, ihe ịchọ mma, ihe ncha na ubi ndị ọzọ. Dị ka thickener, stabilizer na suspending gị n'ụlọnga, ọ nwere ike n'ụzọ dị irè ịchịkwa viscosity na rheology nke usoro. Na agba na mkpuchi, HEC na-egbochi nhazi pigmenti ma na-eme ka ọkwa mkpuchi dịkwuo mma.
HPC: Hydroxypropyl cellulose bụ nke a na-ejikarị na ọgwụ, nri, ihe ịchọ mma na ubi ndị ọzọ. Na ụlọ ọrụ na-emepụta ọgwụ, a na-ejikarị HPC eme ihe dị ka onye na-ekekọta ma na-achịkwa maka mbadamba nkume. N'ime ụlọ ọrụ nri, enwere ike iji ya dị ka ihe na-agbapụta na emulsifier. N'ihi solubility ya na organic solvents, HPC na-ejikwa ụfọdụ mkpuchi na akpụkpọ anụ.
5. Nkwụsi ike na ogologo oge
HEC: Hydroxyethyl cellulose nwere ezigbo nkwụsi ike nke kemịkalụ na ịdịte aka, ọ naghị enwe ike ime mgbanwe pH, ma na-adịgide adịgide n'oge nchekwa. HEC ka kwụsiri ike n'okpuru ọnọdụ pH dị elu ma dị ala.
HPC: Hydroxypropyl cellulose na-enwe mmetụta maka mgbanwe na okpomọkụ na pH, ọ na-adịkarịkwa na gelation karịsịa na okpomọkụ dị elu. Nkwụsi ike ya ka mma n'okpuru ọnọdụ acidic, mana nkwụsi ike ya ga-ebelata n'okpuru ọnọdụ alkaline.
6. Environment na biodegradability
HEC: Hydroxyethyl cellulose bụ ihe sitere na cellulose eke, nwere ezigbo biodegradability ma bụrụ enyi na gburugburu ebe obibi.
HPC: Hydroxypropyl cellulose bụkwa ihe na-emebi emebi, mana omume mmebi ya nwere ike ịdị iche n'ihi ike ya na ụdị ngwa dị iche iche.
Hydroxyethyl cellulose na hydroxypropyl cellulose bụ ihe abụọ dị mkpa sitere na cellulose. Ọ bụ ezie na ha abụọ nwere ike ịgbakọ, kwụsie ike na ịmepụta colloid, n'ihi ọdịiche nhazi, ha nwere ọdịiche dị na solubility, viscosity, na ngwa ngwa. Enwere nnukwu ọdịiche dị na nkwụsi ike. Nhọrọ nke mmepụta cellulose ga-eji dabere na mkpa ngwa akọwapụtara yana ihe achọrọ.
Oge nzipu: Ọgọst-08-2024