Carboxymethyl selulose (Carboxy Methyl Cellulose, CMC) ni ether ikomoka kuri selile naturel.Ni ifu yera cyangwa umuhondo muto.Nibishishwa byamazi anionic surfactant.Ntabwo ari impumuro nziza, uburyohe, ntabwo ari uburozi, kandi ifite amazi meza cyane..Mu nganda zimpapuro, CMC imaze imyaka myinshi ikoreshwa cyane mubunini buringaniye hamwe no gufatisha ibiti, ariko ntabwo yateye imbere neza kandi ikoreshwa nkumupapuro wogukora impapuro.
Ubuso bwa selile bwashizwemo nabi, kubwibyo, anionic polyelectrolytes ntabwo isanzwe iyamamaza.Nyamara, ubushakashatsi bwerekanye ko CMC ishobora kwomekwa hejuru yubutaka bwa chlorine idafite ibimera (ECF), bishobora kongera imbaraga zimpapuro;hiyongereyeho, CMC nayo ikwirakwiza, ishobora guteza imbere ikwirakwizwa rya fibre muguhagarika, bityo bikazana impapuro zingana.Gutezimbere impamyabumenyi nabyo byongera imbaraga zumubiri zimpapuro;ikindi, itsinda rya carboxyl kuri CMC rizakora hydrogène hamwe nitsinda rya hydroxyl ya selile ya fibre kugirango yongere imbaraga zimpapuro.Imbaraga zimpapuro zishimangirwa zijyanye nurwego nogukwirakwiza kwa CMC adsorption hejuru ya fibre, kandi imbaraga nogukwirakwiza adsorption ya CMC hejuru ya fibre bifitanye isano nurwego rwo gusimbuza (DS) nurwego rwa polymerisation (DP) ya CMC;kwishyuza, gukubita urwego, na pH ya fibre, imbaraga za ionic zo hagati, nibindi byose bizagira ingaruka kumubare wa adsorption ya CMC hejuru ya fibre, bityo bikagira ingaruka kumpapuro.
Uru rupapuro rwibanze ku ngaruka za gahunda yo kongeramo imishahara ya CMC n'ibiyiranga mu kongera imbaraga mu mpapuro, hagamijwe gusuzuma ubushobozi bwa CMC nk'ibikoresho byo gukora impapuro zangiza, kandi bigatanga ishingiro ryo gushyira mu bikorwa no guhuza CMC mu gukora impapuro zitose.
1. Gutegura igisubizo cya CMC
Gupima neza 5.0 g ya CMC (yumye rwose, ihindurwamo CMC isukuye), iyongereho buhoro buhoro kuri 600ml (50 ° C) amazi yatoboye munsi ya (500r / min), komeza ubyuke (20min) kugeza igisubizo kiboneye, hanyuma ubireke gukonjesha kugeza mucyumba cy'ubushyuhe, koresha flask ya 1L kugirango ube mwinshi kugirango utegure igisubizo cyamazi ya CMC hamwe na 5.0g / L, hanyuma ureke ihagarare ahantu hakonje mubushyuhe bwicyumba kumasaha 24 kugirango ukoreshwe nyuma.
Urebye ibyakozwe mubikorwa byinganda (papermaking itabogamye) hamwe ningaruka zo kuzamura CMC, mugihe pH ari 7.5, indangagaciro ya tensile, indangururamajwi, indira yerekana amarira hamwe no kwihanganira impapuro ziyongereyeho 16.4 ugereranije nimbaraga zijyanye no kugenzura ubusa. icyitegererezo.%, 21.0%, 13.2% na 75%, hamwe ningaruka zigaragara zo kuzamura impapuro.Hitamo pH 7.5 nkigiciro cya pH kubwinyongera ya CMC.
2. Ingaruka ya dosiye ya CMC mukuzamura impapuro
Ongeramo NX-800AT carboxymethyl selulose, dosiye ni 0,12%, 0,20%, 0.28%, 0.36%, 0.44% (kuri pulp yumye rwose).Mubindi bihe bimwe, ubusa utongeyeho CMC yakoreshejwe nkurugero rwo kugenzura.
Iyo ibikubiye muri CMC ari 0,12%, ibisubizo byerekana ko indangagaciro ya tensile, indangagaciro yaturika, indira y'amarira hamwe n'imbaraga zo kuzinga impapuro ziyongereyeho 15.2%, 25.9%, 10.6% na 62.5% ugereranije nicyitegererezo cyuzuye.Birashobora kugaragara ko urebye ukuri kwinganda, ingaruka nziza yo kuzamura irashobora kuboneka mugihe dosiye ntoya ya CMC (0,12%) yatoranijwe.
3. Ingaruka yuburemere bwa CMC kumpapuro zishimangira
Mubihe bimwe na bimwe, ubwiza bwa CMC bugereranya ubunini bwuburemere bwacyo, ni ukuvuga urwego rwa polymerisation.Wongeyeho CMC kumpapuro zahagaritswe, viscosity ya CMC igira ingaruka zikomeye kumikoreshereze.
Ongeraho 0.2% NX-50AT, NX-400AT, NX-800AT carboxymethyl selulose ibisubizo byikizamini, viscosity ni 0 bisobanura icyitegererezo cyubusa.
Iyo viscosity ya CMC ari 400 ～ 600mPa • s, kwiyongera kwa CMC birashobora kugera ku ngaruka nziza zo gushimangira.
4. Ingaruka zo kurwego rwo gusimbuza imbaraga zimpapuro zongerewe CMC
Urwego rwo gusimbuza CMC rwongewe kumpera itose rugenzurwa hagati ya 0.40 na 0.90.Urwego rwo hejuru rwo gusimburana, niko arushaho gusimburana no gukemuka, hamwe nuburyo bwo guhuza fibre, ariko nuburyo bubi nabwo bwiyongera bikurikije, ibyo bizagira ingaruka kumikoranire hagati ya CMC na fibre [11].Ongeraho 0.2% ya NX-800 na NX-800AT carboxymethyl selulose hamwe nubwiza bumwe, ibisubizo byerekanwe mubishusho 4.
Imbaraga ziturika, imbaraga zo kurira, nimbaraga zo kugabanuka byose bigabanuka hamwe no kwiyongera kurwego rwo gusimbuza CMC, kandi bikagera kuri byinshi mugihe impamyabumenyi yo gusimburwa ari 0,6, byiyongereyeho 21.0%, 13.2%, na 75% ugereranije nicyitegererezo cyuzuye.Mugereranije, CMC ifite impamyabumenyi yo gusimbuza 0,6 irafasha cyane kongera imbaraga zimpapuro.
5 Umwanzuro
5.1.Iyo pH iri murwego rwa 6.5 kugeza 8.5, iyongerwaho rya CMC rishobora kugira ingaruka nziza, kandi gushimangira CMC birakwiriye gukora impapuro zidafite aho zibogamiye.
5.2 Ingano ya CMC igira uruhare runini mu gushimangira impapuro za CMC.Hamwe no kwiyongera kwa CMC, imbaraga zingana, imbaraga zo guturika no kurira imbaraga zimpapuro zabanje kwiyongera hanyuma bikunda kuba bihagaze neza, mugihe kwihangana gukabije kwerekanaga ko kwiyongera mbere hanyuma bikagabanuka.Iyo dosiye ari 0,12%, ingaruka zigaragara zo gushimangira impapuro zirashobora kuboneka.
Uburemere bwa molekuline ya 5.3CMC nabwo bugira ingaruka zikomeye kumbaraga zimpapuro.CMC ifite ubwiza bwa 400-600mPa · s irashobora kugera kumpapuro nziza.
5.4 Urwego rwo gusimbuza CMC rufite ingaruka ku gushimangira impapuro.CMC ifite impamyabumenyi ya 0.6 na 0.9 irashobora kugaragara neza kunoza imikorere yimpapuro.Ingaruka zo kuzamura CMC zifite impamyabumenyi yo gusimbuza 0,6 iruta iya CMC ifite impamyabumenyi ya 0.9.
Igihe cyo kohereza: Mutarama-28-2023