hydroxyethyl cellulosebụ ihe dị mkpa sitere na cellulose. N'ihi uru dị na akụrụngwa akụrụngwa dị ukwuu, mmeghari ohuru, ihe ndị na-emebi emebi, ihe na-adịghị egbu egbu, ezigbo biocompatibility, na nnukwu mkpụrụ, nnyocha na ojiji ya adọtala ọtụtụ mmasị. . Uru viscosity bụ ihe dị oke mkpa na-egosi arụmọrụ nke hydroxyethyl cellulose. N'akwụkwọ a, hydroxyethyl cellulose nwere uru viscosity karịrị 5 × 104mPa·s na uru ntụ na-erughị 0.3% ka e ji usoro mmepụta mmiri mmiri kwadebe site na usoro alkalization na etherification nke usoro nzọụkwụ abụọ.
Usoro alkalizi bụ usoro nkwadebe nke alkali cellulose. N'akwụkwọ a, a na-eji ụzọ alkalizi abụọ eme ihe. Ụzọ mbụ bụ iji acetone dị ka ihe na-agbaze ihe. A na-etinye ihe ndị dị na cellulose ozugbo na njupụta ụfọdụ nke mmiri sodium hydroxide. Mgbe emechara mmeghachi omume basification, a na-agbakwunye ihe na-eme ka etherifying rụọ ọrụ ozugbo. Ụzọ nke abụọ bụ na a na-etinye ihe ndị dị na cellulose na mmiri sodium hydroxide na urea, a ga-apịakwa alkali cellulose nke usoro a kwadebere iji wepụ ihe karịrị akarị tupu mmeghachi omume etherification. A na-enyocha alkali cellulose nke e ji ụzọ dị iche iche kwadebe site na iji infrared spectroscopy na X-ray diffraction. Dịka njirimara nke ngwaahịa ndị etherification mere si dị, a na-ekpebi usoro nhọrọ.
Iji chọpụta usoro mmepụta etherification kacha mma, e buru ụzọ nyochaa usoro mmeghachi omume nke antioxidant, lye na glacial acetic acid na mmeghachi omume etherification. Mgbe ahụ, mepụta usoro nnwale nke mmeghachi omume otu ihe, chọpụta ihe ndị nwere mmetụta dị ukwuu na arụmọrụ nke hydroxyethyl cellulose akwadoro, ma jiri viscosity nke ngwọta mmiri 2% nke ngwaahịa ahụ dị ka ntụaka ntụaka. Nsonaazụ nnwale ahụ na-egosi na ihe ndị dị ka ọnụọgụ mmiri ahọpụtara, ọnụọgụ ethylene oxide agbakwunyere, oge alkalization, okpomọkụ na oge nke mmeghachi omume mbụ, okpomọkụ na oge nke mmeghachi omume nke abụọ niile nwere nnukwu mmetụta na arụmọrụ nke ngwaahịa ahụ. E mepụtara atụmatụ nnwale orthogonal nwere ihe asaa na ọkwa atọ, usoro mmetụta sitere na nsonaazụ nnwale ahụ nwere ike inyocha ihe ndị bụ isi na nke abụọ na usoro mmetụta nke ihe ọ bụla. Iji kwadebe ngwaahịa nwere uru viscosity dị elu, e mepụtara atụmatụ nnwale kachasị mma, e mechara chọpụta usoro kachasị mma maka ịkwadebe hydroxyethyl cellulose site na nsonaazụ nnwale ahụ.
Njirimara nke oke viscosity akwadorohydroxyethyl celluloseA na-enyocha ma nwalee ya, gụnyere mkpebi nke viscosity, ọdịnaya ntụ, nnyefe ìhè, ọdịnaya mmiri, wdg., site na infrared spectroscopy, nuclear magnetic resonance, gas chromatography, X-ray diffraction, Thermogravimetric-differential thermal analysis na ụzọ ndị ọzọ e si akọwapụta ihe dị na ngwaahịa ahụ iji nyochaa ma mata nhazi ya, nha nhata ya, ogo mgbanwe molar, kristal, nkwụsi ike okpomọkụ, wdg. Usoro nnwale ahụ na-ezo aka na ọkọlọtọ ASTM.
Hydroxyethyl cellulose, ihe dị mkpa sitere na cellulose, adọtala mmasị n'ihi ọtụtụ ihe ndị e ji emepụta ihe, ndị a na-emegharị emegharị, ndị na-emebi emebi, ndị na-adịghị egbu egbu, ndị na-ekwekọghị na ihe ndị dị ndụ, na ndị na-emepụta ihe dị elu. Ọbara nke hydroxyethyl cellulose bụ ihe na-egosi arụmọrụ ya nke ọma. Ọbara nke hydroxyethyl cellulose a kwadebere karịrị 5 × 104mPa·s, ihe dị na ntụ ahụ erughị 0.3%.
N'akwụkwọ a, e ji usoro mmepụta mmiri mmiri kwadebe hydroxyethyl cellulose dị elu site na iji usoro mmepụta mmiri mmiri site na iji alkalization na etherification. Usoro mmepụta alkalization bụ nkwadebe nke alkali cellulose. Họrọ site na ụzọ abụọ nke alkalization. Otu bụ na a na-eji acetone eme ka ihe cellulose ahụ dị ọcha ozugbo dị ka ihe na-agbaze na mmiri sodium hydroxide, wee mee mmeghachi omume etherification na ihe na-eme ka etherification. Nke ọzọ bụ na a na-eme ka ihe cellulosic dị na mmiri sodium hydroxide na urea. A ga-ewepụ alkali gabigara ókè na alkali cellulose tupu mmeghachi omume ahụ. N'akwụkwọ a, a na-amụ ọtụtụ alkali celluloses site na iji infrared spectroscopy na X-ray diffraction. N'ikpeazụ, a na-eji usoro nke abụọ eme ihe dịka njirimara nke ngwaahịa etherification si dị.
Iji chọpụta usoro nkwadebe nke etherification, a mụrụ usoro mmeghachi omume nke antioxidant, alkali na glacial acetic acid n'oge nri. E jiri nnwale otu ihe chọpụta ihe ndị metụtara nkwadebe nke hydroxyethyl cellulose. Dabere na uru viscosity nke ngwaahịa ahụ na mmiri mmiri 2%. Nsonaazụ nnwale ahụ na-egosi na olu nke ihe na-agbaze, ọnụọgụ nke ethylene oxide, oge alkalization, okpomọkụ na oge nke mmiri mmiri mbụ na nke abụọ nwere nnukwu mmetụta na arụmọrụ ngwaahịa ahụ. E jiri usoro nke ihe asaa na ọkwa atọ chọpụta usoro nkwadebe kacha mma.
Anyị na-enyocha ihe onwunwe nke ihe ndị a kwadeberehydroxyethyl cellulose, gụnyere viscosity, ntụ, nnyefe ìhè, mmiri mmiri, wdg. E jiri infrared, nuclear magnetic resonance, gas chromatography, X-ray diffraction, DSC na DAT tụlee njirimara nhazi, otu esi agbanwe agbanwe, molarity nnọchi, kristal na nkwụsi ike okpomọkụ, ụzọ nnwale ahụ wee jiri ụkpụrụ ASTM tụlee ya.
Oge ozi: Eprel-25-2024