I-Carboxymethyl cellulose (CMC) ifunyanwa emva kwe-carboxymethylation ye-cellulose. Isisombululo sayo samanzi sinemisebenzi yokutyeba, ukwenza ifilimu, ukubopha, ukugcina amanzi, ukukhuselwa kwe-colloid, i-emulsification kunye ne-suspension, kwaye isetyenziswa kakhulu kwi-petroleum, ukutya, amayeza, njl.njl., kumashishini e-textile kunye nephepha, yenye yezona ethers zibalulekileyo ze-cellulose. I-cellulose yendalo yeyona polysaccharide isasazwa kakhulu kwaye ininzi kakhulu kwindalo, kwaye imithombo yayo ityebile kakhulu. Itekhnoloji yokuguqula yangoku ye-cellulose igxile kakhulu kwi-etherification kunye ne-esterification. I-Carboxymethylation luhlobo lwetekhnoloji ye-etherification.
iipropati ezibonakalayo
I-Sodium carboxymethyl cellulose (CMC) yi-anionic cellulose ether, enomgubo wefayibha omhlophe okanye otyheli kancinci okanye imbonakalo yomgubo omhlophe, ayinavumba, ayinancasa, ayinatyhefu; inyibilika lula emanzini abandayo okanye emanzini ashushu, yenza isisombululo esithile esicacileyo se-viscosity. Isisombululo asithathi cala okanye sine-alkaline kancinci, asinyibiliki kwi-ethanol, i-ether, i-isopropanol, i-acetone kunye nezinye izinyibilikisi ze-organic, sinyibilika kwisisombululo se-ethanol okanye i-acetone esine-60% yamanzi. Siyi-hygroscopic, sizinzile ekukhanyeni nasekufudumaleni, i-viscosity iyancipha ngokunyuka kobushushu, isisombululo sizinzile kwi-pH 2-10, i-pH ingaphantsi kwe-2, kukho imvula eqinileyo, kwaye i-viscosity iyancipha xa i-pH ingaphezulu kwe-10. Ubushushu bokutshintsha kombala yi-227℃, ubushushu be-carbonization yi-252℃, kwaye uxinzelelo lomphezulu wesisombululo samanzi se-2% yi-71mn/n.
iipropati zeekhemikhali
Ilungiselelwe kwi-cellulose derivatives ze-carboxymethyl substituents, iphatha i-cellulose nge-sodium hydroxide ukwenza i-alkali cellulose, ize iphendule nge-monochloroacetic acid. Iyunithi yeglucose eyakha i-cellulose inamaqela e-hydroxyl amathathu anokutshintshwa, ngoko ke iimveliso ezinamaqondo ahlukeneyo okutshintshwa zinokufunyanwa. Ngokomyinge, i-1 mmol ye-carboxymethyl yangeniswa kwi-1 g yobunzima obomileyo, enganyibilikiyo emanzini kwaye inyibilikise i-asidi, kodwa inokudumba kwaye isetyenziswe kwi-ion exchange chromatography. I-Carboxymethyl pKa imalunga ne-4 emanzini acocekileyo kwaye imalunga ne-3.5 kwi-0.5mol/L NaCl. Yi-cation exchanger ebuthathaka kwaye idla ngokusetyenziselwa ukwahlula iiproteni ezingathathi cala nezisisiseko kwi-pH>4. Ngaphezulu kwe-40% yamaqela e-hydroxyl athathelwa indawo ngamaqela e-carboxymethyl, anokunyibilikiswa emanzini ukwenza isisombululo se-colloidal esizinzileyo esine-viscosity ephezulu.
Injongo ephambili
I-Carboxymethyl cellulose (CMC) yipowder emhlophe engenabungozi kwaye engenavumba kwaye isebenza kakuhle kwaye inyibilika lula emanzini. Isisombululo sayo samanzi lulwelo olucacileyo noluthambileyo olungenacala okanye olune-alkaline, olunyibilikayo kwezinye iiglu kunye neeresini ezinyibilikayo emanzini, kwaye alunyibiliki. kwizithambisi zendalo ezifana ne-ethanol. I-CMC ingasetyenziswa njenge-adhesive, i-thickener, i-suspending agent, i-emulsifier, i-dispersant, i-stabilizer, i-size agent, njl.njl.
I-Sodium carboxymethyl cellulose (CMC) yimveliso enemveliso enkulu, eyona isetyenziswa kakhulu kwaye ilula kakhulu phakathi kwee-cellulose ethers, ezaziwa ngokuba yi-"industrial monosodium glutamate".
1. Isetyenziselwa ukugrumba ioyile negesi yendalo, ukumba imithombo yamanzi kunye neminye imisebenzi
① Udaka olune-CMC lunokwenza udonga lomthombo lube yikeyiki yesihluzo esibhityileyo nesiqinileyo esingenamanzi amaninzi, nto leyo enciphisa ukulahleka kwamanzi.
② Emva kokongeza i-CMC eludakeni, isixhobo sokugrumba sinokufumana amandla amancinci okucheba, ukuze udaka lukwazi ukukhulula igesi egqunywe kuyo ngokulula, kwaye kwangaxeshanye, inkunkuma ilahlwe ngokukhawuleza emngxunyeni wodaka.
③Udaka lokugrumba, njengezinye izinto ezisasazekileyo, lunexesha elithile lokubakho, kwaye ukongezwa kwe-CMC kunokuyenza izinze kwaye kwandise ixesha lokubakho.
④ Udaka olune-CMC aluchaphazeleki kakhulu ngumngundo, ngoko ke akufuneki ukuba ugcine ixabiso le-pH liphezulu kwaye usebenzise izithinteli.
⑤ Iqulethe i-CMC njengesixhobo sokucoca ulwelo lodaka, esinokumelana nongcoliseko lweetyuwa ezahlukeneyo ezinyibilikayo.
⑥ Udaka olune-CMC luzinzile kwaye lunokunciphisa ukulahleka kwamanzi nokuba ubushushu bungaphezulu kwe-150℃.
I-CMC enobuthi obuphezulu kunye nenqanaba eliphezulu lokutshintshwa ifanelekile kudaka olunobuthi obuphantsi, kwaye i-CMC enobuthi obuphantsi kunye nenqanaba eliphezulu lokutshintshwa ifanelekile kudaka olunobuthi obuphezulu. Ukukhethwa kwe-CMC kufuneka kumiselwe ngokweemeko ezahlukeneyo ezifana nohlobo lodaka, ummandla kunye nobunzulu bomthombo.
2. Isetyenziswa kwishishini leempahla zelaphu, ushicilelo kunye nokudaya. Ishishini leempahla lisasebenzisa i-CMC njengearhente yokulinganisa ubungakanani bemisonto ekhaphukhaphu yomqhaphu, uboya besilika, ifayibha yamakhemikhali, izinto ezixutyiweyo kunye nezinye izinto eziqinileyo;
3. Isetyenziswa kwishishini lephepha. I-CMC ingasetyenziswa njengearhente yokuthambisa umphezulu wephepha kunye nearhente yokulinganisa ubungakanani kwishishini lephepha. Ukongeza i-0.1% ukuya kwi-0.3% ye-CMC kwi-pulp kunokunyusa amandla okuxinana kwephepha ngama-40% ukuya kuma-50%, kwandise ukuqhekeka okucinezelweyo ngama-50%, kwaye kwandise ukuxovwa kane ukuya kahlanu.
4. I-CMC ingasetyenziswa njengesithambisi sokungcola xa ifakwa kwiisepha zokwenziwa; iikhemikhali zemihla ngemihla ezifana noshishino lwamazinyo Isisombululo samanzi se-CMC glycerin sisetyenziswa njengesiseko seentsini zamazinyo; ishishini lamayeza lisetyenziswa njengesithambisi kunye nesithambisi; Isisombululo samanzi se-CMC siyaqina kwaye sisetyenziselwa ukucubungula izimbiwa ezidadayo, njl.
5. Kwishishini le-ceramic, ingasetyenziswa njenge-glue, i-plasticizer, i-agent yokumisa i-glaze, i-agent yokulungisa imibala, njl.
6. Isetyenziswa ekwakheni ukuphucula ukugcinwa kwamanzi kunye namandla awo
7. Isetyenziswa kwishishini lokutya. Ishishini lokutya lisebenzisa i-CMC enezinga eliphezulu lokutshintsha njengento yokutyebisa i-ayisikhrim, ukutya okusemathinini, ii-noodles eziphekiweyo ngokukhawuleza, kunye ne-foam stabilizer yebhiya, njl. Kwizinto zokutyebisa, izinto zokubopha okanye izinto ezincedisayo.
8. Ishishini lamayeza likhetha i-CMC ene-viscosity efanelekileyo njengesixhobo sokubopha iipilisi, i-disintegrant, kunye ne-agent yokumisa ii-suspensions.
Ixesha lokuthumela: Novemba-03-2022