I-Carboxymethyl cellulose (iCarboxy Methyl Cellulose, CMC) iphuma ku-ether ku-cellulose yemvelo.Imhlophe noma iphuzi kancane.Kuyi-anionic surfactant encibilika emanzini.Ayinaphunga, ayinambitheki, ayinabuthi, futhi inokuncibilika okuhle kakhulu kwamanzi., I-Viscosity, i-emulsification, i-diffusion, ukumelana nama-enzyme, ukuzinza kanye nobungane bemvelo, i-CMC isetshenziswa kabanzi ekwenzeni iphepha, izindwangu, ukuphrinta nokudaya, i-petroleum, ezolimo eziluhlaza kanye namasimu e-polymer.Embonini yephepha, i-CMC isetshenziswe kabanzi kuma-ejenti okulinganisa ubukhulu kanye nokunamathiswa okunamathelayo iminyaka eminingi, kodwa ayizange ithuthukiswe kahle futhi isetshenziswe njenge-ejenti yokuqinisa ukuphela kwephepha.
Ingaphezulu le-cellulose likhokhiswa kabi, ngakho-ke, i-anionic polyelectrolytes ngokuvamile ayikhangisi.Kodwa-ke, ucwaningo luye lwabonisa ukuthi i-CMC ingaxhunywa ebusweni be-pulp ye-elemental chlorine-free bleaching (ECF), engandisa amandla ephepha;ngaphezu kwalokho, i-CMC iphinde ibe yi-dispersant, engathuthukisa ukuhlakazeka kwemicu ekumisweni, ngaleyo ndlela ilethe ukulingana kwephepha.Ukuthuthukiswa kwezinga nakho kwandisa amandla omzimba wephepha;ngaphezu kwalokho, iqembu le-carboxyl ku-CMC lizokwenza isibopho se-hydrogen neqembu le-hydroxyl le-cellulose ku-fiber ukuze kwandiswe amandla ephepha.Amandla ephepha eliqinisiwe ahlobene nezinga nokusatshalaliswa kwe-CMC adsorption endaweni yefayibha, futhi amandla nokusatshalaliswa kwe-CMC adsorption endaweni yefayibha kuhlobene nezinga lokushintsha (DS) kanye nezinga le-polymerization (DP) we-CMC;ukushaja, idigri yokushaya, kanye ne-pH yefayibha , amandla e-ionic emaphakathi, njll. konke kuzothinta inani le-adsorption le-CMC endaweni yefayibha, ngaleyo ndlela kuthinte amandla ephepha.
Leli phepha ligxile ethonyeni lenqubo yokwengezwa kokuphela okumanzi kwe-CMC kanye nezici zayo ekuthuthukisweni kwamandla ephepha, ukuze kuhlolwe amandla okusebenza e-CMC njenge-ejenti yokuqinisa isiphetho esimanzi yokwenza iphepha, futhi inikeze isisekelo sokusetshenziswa nokuhlanganiswa kwe-CMC. endaweni emanzi yokwenza iphepha.
1. Ukulungiswa kwesixazululo se-CMC
Kala ngokunembile u-5.0 g we-CMC (yome ngokuphelele, iguqulelwe ku-CMC emsulwa), yengeze kancane kancane ku-600ml (50°C) amanzi acwecwe ngaphansi kokunyakaziswa (500r/min), qhubeka ugqugquzela (20min) kuze kucace isisombululo, futhi usivumele. pholisa uze ufike ezingeni lokushisa legumbi , sebenzisa i-1L ye-volumetric flask kuvolumu engashintshi ukuze ulungise isixazululo samanzi se-CMC esinengxube engu-5.0g/L, futhi usivumele ime endaweni epholile ekamelweni lokushisa amahora angu-24 ukuze sisetshenziswe kamuva.
Uma kucatshangelwa uhlelo lwangempela lwezimboni (ukwenza iphepha okungathathi hlangothi) kanye nomphumela wokuthuthukisa i-CMC, lapho i-pH ingu-7.5, inkomba yokuqina, inkomba yokuqhuma, inkomba yezinyembezi kanye nokubekezelela ukugoqa kwephepha kukhuphuka ngo-16.4 ngokuqhathaniswa namandla ahambisanayo okulawula okungenalutho. isampula.%, 21.0%, 13.2% kanye 75%, okunomphumela osobala wokuthuthukisa amaphepha.Khetha i-pH 7.5 njengevelu ye-pH yokungezwa kwe-CMC okulandelayo.
2. Umthelela womthamo we-CMC ekuthuthukisweni kwephepha lephepha
Engeza i-NX-800AT carboxymethyl cellulose, umthamo ngu-0.12%, 0.20%, 0.28%, 0.36%, 0.44% (ku-pulp eyomile ngokuphelele).Ngaphansi kwezinye izimo ezifanayo, okungenalutho ngaphandle kokwengeza i-CMC kusetshenziswe njengesampula yokulawula.
Uma okuqukethwe kwe-CMC kungu-0.12%, imiphumela ikhombisa ukuthi inkomba yokuqina, inkomba yokuqhuma, inkomba yezinyembezi namandla okugoqa ephepha akhuphuka ngo-15.2%, 25.9%, 10.6% no-62.5% ngokulandelanayo uma kuqhathaniswa nesampula elingenalutho.Kungabonakala ukuthi uma kucatshangelwa iqiniso lemboni, umphumela ofanelekile wokuthuthukisa usengatholakala uma kukhethwa umthamo ophansi we-CMC (0.12%).
3. Umphumela wesisindo se-CMC samangqamuzana ekuqinisweni kwephepha
Ngaphansi kwezimo ezithile, i-viscosity ye-CMC imelela ubukhulu besisindo samangqamuzana, okungukuthi, izinga le-polymerization.Ukwengeza i-CMC ekumisweni kwesitoko sephepha, i-viscosity ye-CMC inomthelela omkhulu kumphumela wokusetshenziswa.
Engeza 0.2% NX-50AT, NX-400AT, NX-800AT imiphumela yokuhlolwa kwe-carboxymethyl cellulose ngokulandelanayo, i-viscosity ithi 0 isho isampula elingenalutho.
Uma i-viscosity ye-CMC ingu-400～600mPa•s, ukungezwa kwe-CMC kungazuza umphumela omuhle wokuqinisa.
4. Umthelela wezinga lokushintsha emandleni ephepha elithuthukisiwe le-CMC
Izinga lokushintshwa kwe-CMC engezwe ekugcineni okumanzi lilawulwa phakathi kuka-0.40 no-0.90.Lapho izinga lokushintsha liphakeme, kuba ngcono ukushintshana okufanayo nokuncibilika, futhi kufana kakhulu ukuxhumana nefayibha, kodwa ukushaja okungekuhle nakho kuyanda ngokufanele, okuzothinta inhlanganisela phakathi kwe-CMC nefayibha [11].Engeza u-0.2% we-NX-800 kanye ne-NX-800AT carboxymethyl cellulose nge-viscosity efanayo ngokulandelanayo, imiphumela iboniswa kuMfanekiso 4.
Amandla aqhumayo, amandla okudabula, namandla okugoqa konke kuyehla ngokukhuphuka kwedigri ye-CMC esikhundleni, futhi kufinyelele umkhawulo lapho idigri yokushintsha ingu-0.6, ekhuphuka ngokulandelana ngo-21.0%, 13.2%, no-75% uma kuqhathaniswa nesampula elingenalutho.Uma kuqhathaniswa, i-CMC enezinga lokushintshwa elingu-0.6 isiza kakhulu ekuthuthukisweni kwamandla ephepha.
5 Isiphetho
5.1 I-pH yesistimu yokugcina emanzi e-slurry inomthelela obalulekile emandleni ephepha elithuthukisiwe le-CMC.Uma i-pH ikububanzi obungu-6.5 kuya ku-8.5, ukungezwa kwe-CMC kungaba nomphumela omuhle wokuqinisa, futhi ukuqiniswa kwe-CMC kulungele ukwenza iphepha okungathathi hlangothi.
5.2 Inani le-CMC linomthelela omkhulu ekuqinisweni kwephepha le-CMC.Ngokukhula kokuqukethwe kwe-CMC, amandla aqinile, ukumelana nokuqhuma kanye namandla okudabula eshidi lephepha kwanda kuqala bese kujwayele ukuzinza, kuyilapho ukukhuthazela okugoqayo kukhombisa umkhuba wokwanda kuqala bese wehla.Lapho umthamo ungu-0.12%, umphumela ocacile wokuqinisa iphepha ungatholakala.
Isisindo samangqamuzana esingu-5.3CMC siphinde sibe nomthelela omkhulu emthelela wokuqiniswa kwephepha.I-CMC ene-viscosity engu-400-600mPa·s ingafinyelela ukuqiniswa okuhle kweshidi.
5.4 Izinga lokushintshwa kwe-CMC linomthelela ekuqinisweni komphumela wephepha.I-CMC enedigri yokushintsha engu-0.6 no-0.9 ngokusobala ingathuthukisa ukusebenza kwamandla ephepha.Umthelela wokuthuthukisa we-CMC ngedigri yokushintsha engu-0.6 ungcono kunaleyo ye-CMC enedigri yokushintsha engu-0.9.
Isikhathi sokuthumela: Jan-28-2023