Synthesis uye Rheological Properties yeHydroxyethyl Cellulose Ether

Pamberi peyakazvigadzira yega alkali catalyst, industrial hydroxyethyl cellulose yakaitwa neN-(2,3-epoxypropyl) trimethylammonium chloride (GTA) cationization reagent kugadzirira yakakwirira-inotsiva quaternary ammonium nenzira yakaoma Munyu mhando Hydroxyethyl cellulose ether (HEC). Mhedzisiro yereshiyo yeGTA kune hydroxyethyl cellulose (HEC), chiyero cheNaOH kuHEC, tembiricha yekupindura, uye nguva yekupindura pakuita zvakanaka kwakaongororwa nehurongwa hwekuyedza hwakafanana, uye mamiriro ekugadzirisa akagadziriswa akawanikwa kuburikidza neMonte. Carlo simulation. Uye kuita kwekuita kweiyo cationic etherification reagent inosvika 95% kuburikidza nekuyedza ongororo. Panguva imwecheteyo, maitiro ayo e-rheological akakurukurwa. Zvigumisiro zvakaratidza kuti mhinduro yeHEC yakaratidza maitiro e-non-Newtonian fluid, uye iyo inooneka viscosity yakawedzera nekuwedzera kwekugadziriswa kwehuwandu hwekugadzirisa; mune imwe chiyero chemunyu mhinduro, iyo inooneka viscosity yeHEC yakaderera nekuwedzera kwekuwedzera kwemunyu. Pasi pechiyero chakafanana cheshear, iyo inooneka viscosity yeHEC muCaCl2 solution system yakakwira kupfuura yeHEC muNaCl solution system.

Mazwi akakosha:Hydroxyethylcellulose ether; yakaoma nzira; rheological properties

Cellulose ine hunhu hweakapfuma masosi, biodegradability, biocompatibility uye nyore kubuda, uye inzvimbo yekutsvagisa munzvimbo dzakawanda. Cationic cellulose ndeimwe yevamiriri vakakosha ve cellulose derivatives. Pakati peiyo cationic polymers yezvidziviriro zvigadzirwa zvakanyoreswa neCTFA yeFragrance Industry Association, kushandiswa kwayo ndiko kwekutanga. Inogona kushandiswa zvakanyanya mubvudzi conditioner conditioning additives, softeners, drilling shale hydration inhibitors uye ropa anti-coagulation agents nemimwe minda.

Parizvino, nzira yekugadzirira ye quaternary ammonium cationic hydroxyethyl cellulose ether inzira yekunyungudutsa, inoda mari yakawanda inodhura organic solvents, inodhura, haina kuchengeteka, uye inosvibisa zvakatipoteredza. Kuenzaniswa neyekunyungudutsa nzira, iyo yakaoma nzira ine zvakatanhamara zvakanakira maitiro akareruka, yakakwira maitiro ekuita, uye kushomeka kusvibiswa kwezvakatipoteredza. Mupepa iri, cationic cellulose ether yakagadzirwa nenzira yakaoma uye maitiro ayo erheological akadzidzwa.

1. Chikamu chekuedza

1.1 Zvishandiso uye reagents

Hydroxyethyl cellulose (HEC industrial product, its molecular substitution degree DS is 1.8 ~ 2.0); cationization reagent N-(2,3-epoxypropyl) trimethylammonium chloride (GTA), yakagadzirwa kubva epoxy chloride Propane uye trimethylamine inozvigadzira yega mune mamwe mamiriro; yakazvigadzira alkali catalyst; ethanol uye glacial acetic acid zvakachena; NaCl, KCl, CaCl2, uye AlCl3 makemikari akachena reagents.

1.2 Kugadzirira kwequaternary ammonium cationic cellulose

Wedzera 5g yehydroxyethyl cellulose uye chiyero chakakodzera chemumba alkali catalyst mucylindrical simbi cylinder yakashongedzerwa nestirrer, uye fambisa kwemaminitsi makumi maviri patembiricha yekamuri; wobva wawedzera imwe huwandu hweGTA, ramba uchimhanyisa kwemaminetsi makumi matatu pane tembiricha yekamuri, uye woita pane imwe tembiricha uye nguva, yakasimba crude chigadzirwa chakavakirwa pane chakawanikwa. Chigadzirwa chisina kuchena chakanyikwa mumushonga we ethanol une huwandu hwakakodzera hweacetic acid, yakasefa, yakagezwa, uye yakaomeswa kuti iwane hupfu hwequaternary ammonium cationic cellulose.

1.3 Kusarudzwa kwe nitrogen mass chikamu che quaternary ammonium cationic hydroxyethyl cellulose

Chikamu chikuru che nitrogen mumasampuli chakatemwa neKjeldahl nzira.

2. Kuedza dhizaini uye optimization yakaoma synthesis process

Iyo yunifomu yekugadzira nzira yakashandiswa kugadzira kuyedza, uye mhedzisiro yereshiyo yeGTA kune hydroxyethyl cellulose (HEC), chiyero cheNaOH kuHEC, tembiricha yekuita uye nguva yekupindura pakuita zvakanaka kwakaongororwa.

3. Tsvakurudzo pamusoro pe rheological properties

3.1 Pesvedzero yekuisa pfungwa uye kutenderera kumhanya

Kutora mhedzisiro yeshear rate pane inooneka viscosity yeHEC pazvikamu zvakasiyana Ds = 0.11 semuenzaniso, zvinogona kuonekwa kuti sezvo shear rate inowedzera zvishoma nezvishoma kubva 0.05 kusvika 0.5 s-1, iyo inooneka viscosity yeHEC mhinduro inoderera, kunyanya pa 0.05 ~ 0.5s-1 inooneka viscosity yakadonha zvakanyanya kubva ku160MPa·s kusvika ku40MPa·s, kugera kuonda, zvichiratidza kutiHEC aqueous solution inoratidzira isiri-Newtonian rheological properties. Mhedzisiro yekushandiswa kweshear stress ndeyekuderedza simba rekubatana pakati pezvikamu zvechikamu chakapararira. Pasi pemamwe mamiriro ezvinhu, iyo yakakura simba, iyo yakakura inooneka viscosity.

Inogona zvakare kuoneka kubva kune inooneka viscosities ye3% uye 4%HEC aqueous mhinduro dzekuti kuwanda kwehuwandu hwakateerana 3% uye 4% pamhando dzakasiyana dzekugera. Iyo inooneka viscosity yemushonga inoratidza kuti yayo viscosity-inowedzera kugona kunowedzera nekukasira. Chikonzero ndechekuti sezvo kusungirirwa kunowedzera mune mhinduro sisitimu, kupesana pakati pemamorekuru eketani huru yeHEC uye pakati pemaketani emakemikari anowedzera, uye iyo inooneka viscosity inowedzera.

3.2 Mhedzisiro yehuwandu hwakasiyana hwemunyu wakawedzerwa

The concentration ofHEC yakagadziriswa pa3%, uye mhedzisiro yekuwedzera munyu NaCl pane viscosity properties yemhinduro yakaongororwa pamhando dzakasiyana dzeshear.

Inogona kuonekwa kubva pamigumisiro iyo inooneka viscosity inoderera nekuwedzera kwekuwedzera kwemunyu, kuratidza pachena polyelectrolyte phenomenon. Izvi zvinodaro nekuti chikamu cheNa + mumushonga wemunyu chinosungirirwa kune anion yeHEC side chain. Kunyanya kuwanda kwemusanganiswa wemunyu, kunowedzera dhigirii yekusaurura kana kudzivirira kwepolyon nekaunda, uye kudzikiswa kwemagetsi emagetsi, zvichikonzera kudzikira kwechaji density ye polyion. , iyo polymer cheni inodzikira uye curls, uye iyo inotaridzika yekuisa inoderera.

3.3 Mhedzisiro yemunyu wakasiyana wakawedzerwa pa

Iyo inogona kuoneka kubva mukupesvedzerwa kwemaviri akasiyana akawedzera munyu, Nacl uye CaCl2, pane inooneka viscosity yeHEC mhinduro iyo inooneka viscosity inoderera nekuwedzera kwemunyu wakawedzerwa, uye panguva imwechete yeshear rate, iyo inooneka viscosity yeHEC mhinduro muCaCl2 solution system Iyo inooneka viscosity yakakwira zvakanyanya kupfuura iyo yeHEC mhinduro muNaCl solution system. Chikonzero ndechekuti calcium salt is divalent ion, uye zviri nyore kusunga paCl- ye polyelectrolyte side chain. Iko kusanganiswa kwe quaternary ammonium group paHEC neCl- yakaderedzwa, uye kudzivirira ishoma, uye kuzara kwechaji kwecheni yepolymer kwakakwira, zvichikonzera kuti The electrostatic repulsion pa polymer cheni yakakura, uye cheni yepolymer yakatambanudzwa, saka iyo inooneka viscosity yakakwira.

4. Mhedziso

Kugadzirira kwakaoma kweiyo yakatsiviwa zvakanyanya cationic cellulose inzira yakanaka yekugadzirira ine nyore kushanda, yakakwirira kuita inoshanda, uye kushomeka kusvibiswa, uye inogona kudzivirira yakanyanya kushandiswa kwesimba, kusvibiswa kwezvakatipoteredza, uye muchetura unokonzerwa nekushandiswa kwezvinonyungudutsa.

Mushonga we cationic cellulose ether unopa maitiro e-non-Newtonian fluid uye ane maitiro ekuveura kutetepa; sezvo mhinduro yakawanda yehuwandu inowedzera, iyo inooneka viscosity inowedzera; mune imwe musanganiswa wemunyu munyu,HEC viscosity inooneka inowedzera nekuwedzera uye kuderera. Pasi pechiyero chakafanana cheshear, iyo inooneka viscosity yeHEC muCaCl2 solution system yakakwira kupfuura yeHEC muNaCl solution system.