Synthesis le Rheological Properties ea Hydroxyethyl Cellulose Ether

Ka pel'a sesebelisoa sa alkali se iketselitseng, indasteri ea hydroxyethyl cellulose e ile ea etsoa ka N-(2,3-epoxypropyl) trimethylammonium chloride (GTA) cationization reagent ho lokisa boemo bo phahameng ba quaternary ammonium ka mokhoa o omileng oa mofuta oa letsoai Hydroxyethyl cellulose ether (HEC). Litlamorao tsa karo-karolelano ea GTA ho hydroxyethyl cellulose (HEC), karo-karolelano ea NaOH ho HEC, mocheso oa karabelo, le nako ea karabelo mabapi le katleho ea karabelo li ile tsa fuputsoa ka moralo o ts'oanang oa liteko, mme maemo a ntlafetseng a ile a fumanoa ka Monte. Ketsiso ya Carlo. 'Me katleho ea karabelo ea reagent ea cationic etherification e fihla ho 95% ka netefatso ea liteko. Ka nako e ts'oanang, ho ne ho buisanoa ka litšobotsi tsa eona tsa rheological. Liphetho li bontšitse hore tharollo eaHEC e bontšitse litšoaneleho tsa mokelikeli o seng oa Newtonian, 'me viscosity ea eona e bonahalang e ile ea eketseha ka ho eketseha ha motsoako oa boima ba tharollo; ka har'a motsoako o itseng oa tharollo ea letsoai, ponahalo e bonahalang ea viscosity eaHEC e fokotsehile ka ho eketseha ha letsoai le eketsehileng. Tlas'a sekhahla se tšoanang sa ho kuta, ponahalo e hlakileng ea viscosity eaHEC tsamaisong ea tharollo ea CaCl2 e phahame ho feta eaHEC tsamaisong ea tharollo ea NaCl.

Mantsoe a bohlokoa:Hydroxyethylcellulose ether; mokhoa o omileng; litšobotsi tsa rheological

Cellulose e na le litšoaneleho tsa mehloli e ruileng, biodegradability, biocompatibility le ho tsoa habonolo, 'me ke sebaka sa lipatlisiso mafapheng a mangata. Cationic cellulose ke e 'ngoe ea baemeli ba bohlokoa ka ho fetisisa ba derivatives ea cellulose. Har'a li-polymers tsa cationic bakeng sa lihlahisoa tsa ts'ireletso ea botho tse ngolisitsoeng ke CTFA ea Fragrance Industry Association, tšebeliso ea eona ke ea pele. E ka sebelisoa haholo ho li-additives tsa boemo ba moriri, li-softeners, ho cheka li-shale hydration inhibitors le li-anti-coagulation agents le masimo a mang.

Hona joale, mokhoa oa ho lokisa oa quaternary ammonium cationic hydroxyethyl cellulose ether ke mokhoa oa ho qhibiliha, o hlokang chelete e ngata ea li-solvents tse theko e boima, o theko e boima, o sa sireletseha, 'me o silafatsa tikoloho. Ha ho bapisoa le mokhoa oa ho qhibiliha, mokhoa o omileng o na le melemo e ikhethang ea ts'ebetso e bonolo, ts'ebetso e phahameng ea ho arabela, le tšilafalo e fokolang ea tikoloho. Ka pampiri ena, cationic cellulose ether e ile ea etsoa ka mokhoa o omileng 'me boitšoaro ba eona ba rheological bo ile ba ithutoa.

1. Karolo ea liteko

1.1 Lisebelisoa le li-reagents

Hydroxyethyl cellulose (sehlahisoa sa indasteri sa HEC, tekanyo ea eona ea limolek'hule DS ke 1.8 ~ 2.0); cationization reagent N-(2,3-epoxypropyl) trimethylammonium chloride (GTA), e lokisitsoeng ho tloha epoxy chloride Propane le trimethylamine li iketsetsa tlas'a maemo a itseng; e iketselitseng alkali catalyst; ethanol le glacial acetic acid li hloekile; NaCl, KCl, CaCl2, le AlCl3 ke lisebelisoa tse hloekileng tsa lik'hemik'hale.

1.2 Tokisetso ea quaternary ammonium cationic cellulose

Kenya 5g ea hydroxyethyl selulose le palo e loketseng ea alkali catalyst e entsoeng hae ka har'a silindara ea tšepe ea cylindrical e nang le mochini o tsosang, 'me u hlohlelletse metsotso e 20 mocheso oa kamore; Ebe u eketsa palo e itseng ea GTA, tsoela pele ho hlohlelletsa metsotso e 30 mocheso oa kamore, 'me u arabe ka mocheso o itseng le nako, sehlahisoa se tiileng se thehiloeng ho sona se ile sa fumanoa. Sehlahisoa sena se kolobisitsoe ka har'a motsoako oa ethanol o nang le acetic acid e lekaneng, e hloekisitsoeng, e hlatsuoa, 'me e omisitsoe ho fumana phofshoana ea quaternary ammonium cationic cellulose.

1.3 Qeto ea karolo ea boima ba nitrogen ea quaternary ammonium cationic hydroxyethyl cellulose

Karolo e boima ea naetrojene lisampoleng e ile ea khethoa ke mokhoa oa Kjeldahl.

2. Moralo oa liteko le ho ntlafatsa ts'ebetso ea motsoako o omileng

Mokhoa o tšoanang oa moralo o ile oa sebelisoa ho rala teko, 'me liphello tsa karo-karolelano ea GTA ho hydroxyethyl cellulose (HEC), karo-karolelano ea NaOH ho HEC, mocheso oa karabelo le nako ea ho arabela ka katleho ea karabelo li ile tsa fuputsoa.

3. Lipatlisiso ka thepa ea rheological

3.1 Tšusumetso ea ho tsepamisa mohopolo le lebelo la ho potoloha

Ho nka phello ea sekhahla sa ho kuta ka ponahalo e bonahalang ea viscosity eaHEC ka likhakanyo tse fapaneng Ds = 0.11 e le mohlala, ho ka bonoa hore ha sekhahla sa ho kuta butle-butle se eketseha ho tloha 0.05 ho ea ho 0.5 s-1, viscosity e bonahalang eaHEC tharollo e fokotseha, haholo-holo ho 0.05 ~ 0.5s-1 viscosity e bonahalang e theohile haholo ho tloha 160MPa·s ho isa ho 40MPa·s, ho kuta, ho bontša horeHEC tharollo ea metsi e bonts'a thepa e seng ea Newtonian rheological. Phello ea khatello ea ho kuta e sebelisitsoeng ke ho fokotsa matla a ho sebelisana pakeng tsa likaroloana tsa karolo e qhalakaneng. Tlas'a maemo a itseng, matla a maholo, a na le viscosity e hlakileng haholoanyane.

E ka boela ea bonoa ho li-viscosities tse bonahalang tsa 3% le 4%HEC litharollo tse nang le metsi a mangata hore mahloriso a boima ke 3% le 4% ka litekanyetso tse fapaneng tsa ho kuta. The viscosity e bonahalang ea tharollo e bontša hore bokhoni ba eona ba ho eketsa viscosity bo eketseha ka ho tsepamisa mohopolo. Lebaka ke hore ha mahloriso a ntse a eketseha tsamaisong ea tharollo, ho khopisana pakeng tsa limolek'hule tsa ketane e kholo.HEC 'me pakeng tsa liketane tsa limolek'hule lia eketseha, 'me ho bonahala eka viscosity ea eketseha.

3.2 Phello ea likhakanyo tse fapaneng tsa letsoai le ekelitsoeng

Khatiso eaHEC e ne e behiloe ho 3%, 'me phello ea ho eketsa letsoai NaCl ka thepa ea viscosity ea tharollo e ile ea batlisisoa ka litekanyetso tse fapaneng tsa ho kuta.

E ka bonoa ho tsoa ho liphetho tsa hore viscosity e bonahalang e fokotseha ka ho eketseha ha letsoai le ekelitsoeng, ho bonts'a ntho e hlakileng ea polyelectrolyte. Sena ke hobane karolo ea Na + ka har'a tharollo ea letsoai e tlameletsoe ho anion eaHEC ketane e ka thoko. E kholoanyane ea mahloriso ea tharollo ea letsoai, tekanyo e kholo ea ho se nke lehlakore kapa ho sireletsa polyion ka counterion, le ho fokotseha ha electrostatic repulsion, ho fella ka ho fokotseha ha sekhahla sa tefiso ea polyion. , ketane ea polymer e fokotseha 'me e kobeha,' me mahloriso a bonahalang a fokotseha.

3.3 Phello ea matsoai a fapaneng a ekelitsoeng ho

E ka bonoa ho tsoa tšusumetsong ea matsoai a mabeli a fapaneng a kenyellelitsoeng, Nacl le CaCl2, holim'a viscosity e hlakileng.HEC tharollo ea hore viscosity e bonahalang e fokotseha ka ho eketsoa ha letsoai le ekelitsoeng, 'me ka tekanyo e tšoanang ea ho kuta, viscosity e bonahalang eaHEC tharollo tsamaisong ea tharollo ea CaCl2 The viscosity e bonahalang e phahame haholo ho feta eaHEC tharollo tsamaisong ea tharollo ea NaCl. Lebaka ke hore letsoai la calcium ke ion ea divalent, 'me ho bonolo ho tlama ho Cl- ea ketane ea mahlakoreng a polyelectrolyte. Motsoako oa sehlopha sa quaternary ammonium kaHEC ka Cl- e fokotsehile, 'me tšireletso e fokotsehile,' me tefiso ea tefiso ea ketane ea polymer e phahame, e leng se hlahisang The electrostatic repulsion ka ketane ea polymer e kholoanyane, 'me ketane ea polymer e otlolohile, kahoo viscosity e bonahalang e phahame.

4. Qetello

Tokiso e omileng ea cationic cellulose e nkeloang sebaka haholo ke mokhoa o loketseng oa ho itokisa ka ts'ebetso e bonolo, ts'ebetso e phahameng ea karabelo, le ts'ilafalo e nyane, 'me e ka qoba tšebeliso e phahameng ea matla, tšilafalo ea tikoloho le chefo e bakoang ke ts'ebeliso ea lihlapolli.

Tharollo ea cationic cellulose ether e fana ka litšobotsi tsa mokelikeli o seng oa Newtonian 'me o na le litšobotsi tsa ho fokotsa ho kuta; ha boima ba tharollo bo ntse bo eketseha, viscosity ea eona e bonahalang e ntse e eketseha; ka har'a motsoako o itseng oa letsoai,HEC ponahalo ea viscosity e eketseha ka keketseho le ho fokotseha. Tlas'a sekhahla se tšoanang sa ho kuta, ponahalo e hlakileng ea viscosity eaHEC tsamaisong ea tharollo ea CaCl2 e phahame ho feta eaHEC tsamaisong ea tharollo ea NaCl.