Hydroxyethythythythythyth Cellulose (HEC) bụ polymer nke polmer sitere na cellose, polymer sitere polymer nke dị na mgbidi osisi. A na-ejikarị ya n'ụlọ ọrụ dị iche iche, gụnyere ọgwụ, ihe ịchọ mma, na-ese ihe, na ihe nkiri, na nza. Nkwadebe nke hydroxyethythythyth cellulose na-agụta ogo nke cellulose na etlene oxide n'okpuru ọnọdụ alkaline. Enwere ike imebi usoro a n'ime ọtụtụ ụzọ dị iche iche: nsị cellulose, alkalization, ehura, mkpochapụ, ịsacha, na nkụ.
1. Nducha Cellulose
Nzọụkwụ mbụ na nkwadebe nke hydroxyethythythythythythythyth cellulose bụ ọcha nke cellulose, na-ejikarị ahịhịa pulp ma ọ bụ akwa akwa. Raw cellulose nwere adịghị ọcha dị ka liminin, himicelllose, na ndị ọzọ na-ewepụta ga-ewepụrịrị mkpụrụ osisi cellulose dị elu maka mmegharị mmiri.
Nzọụkwụ gụnyere:
Nkwaksi aka: A na-eme usoro cellose na-arụ ọrụ iji belata ogo ya ma mụbaa elu ya, na-eme ka usoro ọgwụgwọ kemịkalụ nke sochirinụ.
Ọgwụ kemịkal: a na-agwọ Celllose na kemịkal hydroxide (na2SOLell sọlfọ (na2SOLell sọlfọ (na2SOLell suld, na-esochi ya na ịcha ọcha, fibrous na-acha ọcha.
2. Alkalization
Celfilose dị ọcha ka ọ ga-eme ka ọ rụọ ọrụ iji mee ka ọ bụrụ mmeghachi omume. Nke a gụnyere ịgwọ Cellulose na ngwọta akwara nke sodium hydroxide.
Mmeghachi omume:
Ooh → Alkali Cellulose
Usoro:
A na-agbakwunye cellose na mmiri, a na-agbakwunye celdilose. A na-etinye sosoxide sodium hydroxide. Theta nke Naoh na-abụkarị nke sitere na 10-30%, mmeghachi omume na-arụ ọrụ na okpomọkụ n'etiti 20-40 Celsius.
A na-akpali ngwakọta ahụ iji hụ na otu Uniform nke Alkali, na-eduga na nguzobe alkali cellulose. Nke a na-etiti na-emeghachikwu na-emeghachi omume na Ethlene oxide, na-eme ka usoro ehure ahụ.
3. Ekele
Isi nzọụkwụ na nkwadebe nke hydroxyethythythythyth cellulose bụ ehurification nke alkali celluluse na ehenene oxide. Ihe mmeghachi omume a na-ewebata otu Hydroxyethyl (-ch2CH9OH9OH) n'ime akwa ballose, na-eme ya mmiri - soluble.
Mmeghachi omume:
Alkali Cellulose + ethylene oxide → hydroxyethythyth cellose + nah
Usoro:
A na-agbakwunye otyylene oxide na alkali cellulose, ma ọ bụ na akụkụ ma ọ bụ usoro na-aga n'ihu. A na-eme mmeghachi omume a na-arụ ọrụ ma ọ bụ ihe nchegharị.
Ọnọdụ mmeghachi omume, gụnyere okpomọkụ (50-100 ° C) na nrụgide (1-5 ATM), na-eji nlezianya na-eji nlezianya na-ejikọta ya iji hụ na njigide hydroxyethyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy dị iche iche. Obere ihe eji eme ihe (DS) na nbichi anya (MS) bụ parameters dị oke mkpa na-emetụta akụrụngwa nke ngwaahịa ikpeazụ.
4. Nnọpụ ya
Mgbe mmeghachi omume a ga-emeghachi omume, ngwakọta ahụ nwere hydroxyethythyyth cellulose na sodium hydroxide na-efe efe. Nzọụkwụ ọzọ bụ neutralization, ebe Alkali karịrị akarị na-eji acid, na-abụkarị acetic acid (Ch3coh) ma ọ bụ hydrochloric acid (hly).
Mmeghachi omume: Nav + HL → Nacl + H2o
Usoro:
The acid is slowly added to the reaction mixture under controlled conditions to avoid excessive heat and prevent degradation of hydroxyethyl cellulose.
A na - edowe ngwakọta na - emeghe na - edowe ya na mgbanwe pH iji hụ na ọ bụ na ọ dị na ọchọrọ, na - abụkarị nke na - anọpụ iche ph (6-8).
5. Ịsa ahụ
Akụkụ na-eso, a ga-asacha ngwaahịa a iji wepu nnu na ngwaahịa ndị ọzọ. Nzọụkwụ a dị oke mkpa maka inweta hydroxyethythythyth cellulose.
Usoro:
A na-etinye ngwakọta mmeghachi omume na mmiri, na hydroxyethythythythythythyth cellulite na-ekewa site na ngbanwe ma ọ bụ centrifugation.
A na-asachapụ hydroxyoseth cellulose ugboro ugboro iji kpoo mmiri na-eghe iji wepu salts na adịghị ọcha ugboro ugboro. Usoro ịsa ahụ na-aga n'ihu ruo mgbe mmiri na-asa ahụ na-erute ihe omume akọwapụtara, na-egosi mwepụ nke ọgbụgba adịghị mma.
6. Ihicha
Nzọụkwụ ikpeazụ na nkwadebe nke hydroxyethythyth cellulose na-akpọ nkụ. Nzọụkwụ a na-ewepụ mmiri buru ibu, na-ekwenye ekwenye, ngwaahịa akọrọ kwesịrị ekwesị kwesịrị ekwesị maka ngwa dị iche iche.
Usoro:
Saịlị na-asa ahụ celldyythyth na-agbasa na trays na-akpọ nkụ ma ọ bụ zigharịa ọwara ajị ara. A na-eji nlezianya na-eji nlezianya achịkwa iji zere mmebi ikuku, nke na-abụkarị nke 50-80 Celsius C.
N'aka nke ọzọ, enwere ike iji ihicha nkụ maka ngwa ngwa ma rụọ ọrụ. Na ịgba nkụ, ihe mgbochi na-eme ka ọ dị mma ma mịrị amị na ikuku na-ekpo ọkụ, na-ebute ezi ntụ ntụ.
Ngwaahịa a mịrị amị ahụ dị na urughuru chọrọ nha na nke a chọrọ maka nchekwa na nkesa.
Njikwa na ngwa
Kemgbe nkwadebe usoro, usoro njikwa arụmọrụ na-emejuputa iji hụ na nha anya na ịdị mma nke hydroxyethythyth cellulose. A na-enyochakarị parampat ndị dị mkpa dị ka viscosity, ogo nke nnọchi, a na-enyocha ọdịnaya, na-enyocha ihe na urughuru.
Ngwa:
Ọgwụ ọgwụ: ejiri dị ka onye na - eme ọgwụ, na ebe a na - eme mkpọtụ, na ma sie ike na usoro dị ka mbadamba, kwụsịtụrụ na mmanụ.
Cosmetics: Na-enye viscosity na udidi na ederede na ude, lotions, na shampoos.
Eserese na Coatings: Ọrụ dị ka nke ukwu na rhiology modifier, na-eme ka akụrụngwa ngwa na nkwụsi ike nke eserese.
Industrylọ ọrụ nri: ọrụ dị ka nke na-eto eto, kwụsie ike, na emilifier na ngwaahịa nri dị iche iche.
Nkwadebe nke hydroxyethythythythythyths cellulose gụnyere usoro kemịkal akọwapụtara nke ọma na usoro nke mebere iji gbanwee hydroxtyy. Nzọụkwụ ọ bụla, site na ịdị ọcha cellulose iji kpọọ nkụ, dị oke mkpa na ịchọpụta ogo na arụmọrụ nke ngwaahịa ikpeazụ. Njirimara Hydroxyeths Coutatile na-eme ka ọ bụrụ ihe bara uru n'ọtụtụ ụlọ ọrụ, na-akọwapụta ịdị mkpa nke ịrụpụta ihe iji mepụta ihe ndị dị iche iche.
Oge Post: Mee-28-2024