Shaqooyinka ether-ka cellulose ee ku jira hoobiye waa: haynta biyaha, kordhinta isku xirnaanta, dhumucda, saameeya waqtiga dejinta, iyo guryaha-hawo-mareenka.Sababtoo ah sifooyinkaas, waxay leedahay meel bannaan oo codsi ah oo lagu dhisayo hoobiye walxaha.
1. Haysashada biyaha ee ether cellulose waa dabeecadda ugu muhiimsan ee codsiga hoobiye.
Waxyaabaha ugu muhiimsan ee saameeya haynta biyaha ee ether cellulose: viscosity, size particles, dose, walax firfircoon, heerka kala diri, habka haynta biyaha: haynta biyaha ee ether cellulose laftiisa ka yimaada milanka iyo fuuqbaxa ether cellulose laftiisa.Inkasta oo silsiladda molecular cellulose ay ka kooban tahay kooxo badan oo hydroxyl ah oo leh sifooyin fuuq-baxa xooggan, kuma filna biyaha.Tani waa sababta oo ah qaab-dhismeedka cellulose wuxuu leeyahay heerar sare oo crystallinity ah, iyo awoodda fuuq-celinta ee kooxaha hydroxyl kaliya kuma filna inay burburiyaan curaarta intermolecular ee xooggan.Hydrogen bonds iyo van der Waals ciidamada, si ay u bararto oo kaliya laakiin kuma milmaan biyaha.Marka beddelka lagu soo bandhigo silsiladda molecular, kaliya ma aha beddelka jebiya bond bond, laakiin sidoo kale bond interchain hydrogen waa la jebiyey sababtoo ah jeexista beddelka ee u dhexeeya silsiladaha ku xiga.Badalka weyn ee beddelka, ayaa sii weynaan doona masaafada u dhaxaysa molecules waa, taas oo burburisa saamaynta curaarta hydrogen.Inta uu sii weynaado shafka cellulose-ka, xalku waxa uu galaa ka dib marka uu balaadhiyo xuubka cellulose, eter-ka cellulose-ku waxa uu noqdaa mid biyo-milmi kara, samaynta xal sare oo viscosity ah.Marka heerkulku kordho, fuuq-baxa polymer-ka ayaa daciifa, biyaha u dhexeeya silsiladaha ayaa la saaraa.Marka fuuq-baxu ku filan yahay, unugyadu waxay bilaabaan inay isugeeyaan, iyagoo samaynaya qaab-dhismeedka shabakad saddex-geesood ah iyo roobab jel ah.
(1) Saamaynta cabbirka walxaha iyo waqtiga isku dhafka etherka cellulose ee haynta biyaha
Iyada oo la mid ah qiyaasta ether cellulose, haynta biyaha ee hoobiye waxay kordhisaa kororka viscosity;korodhka qadarka ether cellulose iyo korodhka viscosity waxay kordhisaa haynta biyaha ee hoobiye.Marka waxa ku jira ether-ka cellulose uu ka sarreeyo 0.3%, beddelka haynta biyaha hoobiye waxay u egtahay in ay dheelli tiran tahay.Awooda haynta biyaha ee hoobiye waxaa inta badan gacanta ku haya wakhtiga kala dirida, ether-ka cellulose-ka fiicani si dhakhso ah ayuu u milmaa, awoodda haynta biyuhuna si dhakhso ah ayay u koraan.
(2) Saamaynta heerka etherification of ether cellulose iyo heerkulka on haynta biyaha
Marka heerkulku kor u kaco, haynta biyaha ayaa hoos u dhacda, iyo heerka sare ee etherification of ether cellulose, si fiican u haynta biyaha heerkulka sare ee etherka cellulose.Inta lagu jiro isticmaalka, heerkulka hoobiyeyaasha cusub ee la isku daray ayaa caadi ahaan ka hooseeya 35 ° C, iyo xaaladaha cimilada gaarka ah, heerkulku wuxuu gaari karaa ama xitaa ka badan karaa 40 ° C.Xaaladdan oo kale, caanaha waa in la hagaajiyaa oo badeecada leh heer sare oo etherification ah waa in la doortaa.Taasi waa, tixgeli inaad doorato eter cellulose ku habboon.
2. Saamaynta ether-ka cellulose ee hawo-mareenka
Badeecooyinka hoobiyeyaasha ee qallalan ee qallalan, sababtoo ah ku darida ether cellulose, qadar yar oo yaryar, si siman loo qaybiyay iyo goobooyin hawo xasiloon ayaa la geliyaa hoobiye cusub oo isku dhafan.Iyada oo ay ugu wacan tahay saamaynta kubbadda xumbooyinka hawada, hoobiyedu waxay leedahay karti shaqo oo wanaagsan waxayna yaraynaysaa jeexjeexa hoobiye.Dildilaaca oo yaraada, oo kordhi heerka soosaarka hoobiye.
3. Saamaynta etherka cellulose ee fuuq-celinta sibidhka
Ether Cellulose waxay leedahay dib-u-dhac ku yimaada fuuq-celinta hoobiye-ku-saleysan sibidhka, iyo saameynta dib-u-dhaca waxaa lagu wanaajiyey kororka maadada etherka cellulose.Waxyaabaha saamaynta leh ee ether cellulose ee fuuq-celinta sibidhka waa: qiyaasta, heerka etherification, nooca sibidhka.
Waqtiga boostada: Febraayo-02-2023