Yintoni i-carboxymethyl cellulose

I-Carboxymethyl cellulose (CMC) ifumaneka emva kwe-carboxymethylation ye-cellulose.Isisombululo saso samanzi sinemisebenzi yokuqina, ukubunjwa kwefilimu, ukunamathela, ukugcinwa kwamanzi, ukukhuselwa kwe-colloid, i-emulsification kunye nokumiswa, njl. .I-cellulose yendalo yeyona nto isasazwe kakhulu kwaye ininzi kakhulu kwi-polysaccharide kwindalo, kwaye imithombo yayo ityebile kakhulu.Itekhnoloji yangoku yokuguqula i-cellulose igxile ikakhulu kwi-etherification kunye ne-esterification.I-Carboxymethylation reaction luhlobo lwetekhnoloji ye-etherification.

iimpawu zomzimba

I-Sodium carboxymethylcellulose (CMC) yi-anionic cellulose ether.Imbonakalo yayo imhlophe okanye ityheli kancinane ifayibha engumgubo okanye umgubo omhlophe, ayinavumba, ayinancasa, kwaye ayinayo ityhefu;inyibilika ngokulula emanzini abandayo okanye ashushu kwaye yenza i-viscosity ethile.isisombululo esiselubala.Isisombululo singathathi hlangothi okanye i-alkaline encinci, ayinakunyibilika kwi-ethanol, i-ether, isopropanol, i-acetone kunye nezinye i-solvents eziphilayo, kodwa i-soluble kwi-60% ye-ethanol okanye isisombululo se-acetone.I-hygroscopic kwaye izinzile ekukhanyeni nasekufudumeni.I-viscosity iyancipha ngokunyuka kweqondo lokushisa.Isisombululo sizinzile kwi-pH 2-10.Xa i-pH ingaphantsi kwe-2, izinto eziqinileyo ziyaqina.Xa i-pH iphezulu kune-10, i-viscosity iyancipha.Ukushisa kwe-discoloration yi-227 ° C, ukushisa kwe-carbonization yi-252 ° C, kunye ne-tension surface ye-2% isisombululo se-aqueous yi-71mn / n.

iimpawu zeekhemikhali

Ifunyenwe ngokuphatha i-cellulose kunye ne-carboxymethyl substituents, ukuphatha i-cellulose nge-sodium hydroxide ukwenza i-alkali cellulose, kwaye emva koko iphendule nge-monochloroacetic acid.Iyunithi ye-glucose eyenza i-cellulose inamaqela amathathu e-hydroxyl anokutshintshwa, ngoko ke iimveliso ezinamaqondo ahlukeneyo okutshintshwa zingafumaneka.Ngokomyinge, i-1mmol yeqela le-carboxymethyl nge-1g yobunzima obomileyo ayinyibiliki emanzini kunye ne-asidi edibeneyo, kodwa inokudumba kwaye isetyenziswe kwi-ion exchange chromatography.I-Carboxymethyl pKa imalunga ne-4 emanzini acocekileyo kwaye malunga ne-3.5 kwi-0.5mol / L NaCl.I-acidic cation exchanger ebuthathaka kwaye idla ngokusetyenziselwa ukwahlula iiprotheni ezingathathi hlangothi kunye nesiseko kwi-pH>4.Ngaphezulu kwe-40% yamaqela e-hydroxyl athatyathelwa indawo ngamaqela e-carboxymethyl, anokuchithwa emanzini ukuze enze isisombululo esizinzileyo se-colloidal high-viscosity.

Injongo ephambili

I-Carboxymethylcellulose (CMC) ayiyotyhefu, i-flocculent powder emhlophe engenavumba kunye nokusebenza okuzinzileyo kwaye inyibilika ngokulula emanzini.Isisombululo saso samanzi silulwelo lwe-viscous olungathathi hlangothi okanye lwealkaline, lunyibilika kwezinye iiglues ezinyibilikayo zamanzi kunye neeresini, kwaye azinyibiliki kwizinyibilikisi zendalo ezifana ne-ethanol.I-CMC ingasetyenziswa njenge-binder, i-thickener, i-arhente yokumisa, i-emulsifier, i-dispersant, i-stabilizer, i-agent ye-size, njl.

I-sodium carboxymethyl cellulose (CMC) yimveliso enemveliso enkulu, olona luhlu lubanzi losetyenziso kunye nolona setyenziso lufanelekileyo phakathi kwe-cellulose ethers, eyaziwa njenge "industrial monosodium glutamate".

1. Isetyenziswe kwi-oyile kunye negesi yendalo yokugaya, ukumba kakuhle kunye nezinye iiprojekthi

① Udaka oluqulathe i-CMC lunokwenza udonga lwequla lube yikeyiki ebhityileyo neqinileyo enokungeneka okuncinci, icuthe ilahleko yamanzi.

② Emva kokongeza i-CMC eludakeni, i-drilling rig inokufumana amandla aphantsi okucheba okuqala, ukwenzela ukuba udaka lukwazi ukukhulula lula igesi ehlanganiswe kuyo, kwaye kwangaxeshanye, i-debris ingalahlwa ngokukhawuleza emgodini wodaka.

③ Ukugrumba udaka, njengezinye izinto ezixhonyiweyo kunye nokusasazwa, kunobomi obuthile beshelufu.Ukongeza i-CMC ingayenza izinze kwaye yandise ubomi beshelufu.

④ Udaka oluqulethe i-CMC alufane luchaphazeleke kukungunda, ngoko akuyomfuneko ukugcina ixabiso le-pH eliphezulu kunye nokusetyenziswa kwezithinteli.

⑤ Iqulethe i-CMC njenge-arhente yonyango lokwemba ulwelo olugungxulwa eludakeni, olukwaziyo ukumelana nongcoliseko lweetyuwa ezahlukeneyo ezinyibilikayo.

⑥ Udaka oluqulathe iCMC lunozinzo oluhle kwaye lunokunciphisa ilahleko yamanzi nokuba ubushushu bungaphezu kwe-150°C.

I-CMC ene-viscosity ephezulu kunye neqondo eliphezulu lokutshintshela ilungele udaka olunoxinano oluphantsi, kunye ne-CMC ene-viscosity ephantsi kunye neqondo eliphezulu lokutshintshela lilungele udaka olunoxinano oluphezulu.Ukhetho lweCMC kufuneka lumiselwe ngokweemeko ezahlukeneyo ezifana nodidi lodaka, ummandla, kunye nobunzulu bequla.

2. Isetyenziswa kumashishini eendwangu, ukuprinta kunye nokudaya.Kushishino lwamalaphu, i-CMC isetyenziswa njenge-arhente yokulinganisa umsonto okhanyayo wokulinganisa umqhaphu, uboya besilika, ifayibha yemichiza, edityanisiweyo kunye nezinye izinto ezomeleleyo;

3. Isetyenziswa kushishino lwephepha i-CMC ingasetyenziswa njenge-arhente yokugudisa iphepha kunye ne-agent yokulinganisa kushishino lwephepha.Ukongeza i-0.1% ukuya kwi-0.3% ye-CMC kwi-pulp inokunyusa amandla e-tensile yephepha nge-40% ukuya kwi-50%, yandise ukuxhathisa ukuqhekeka ngama-50%, kunye nokwandisa ipropati yokuxova ngama-4 ukuya kuma-5 amaxesha.

4. I-CMC ingasetyenziswa njenge-adsorbent yokungcola xa ifakwe kwii-synthetic detergents;iikhemikhali mihla ezifana intlama yamazinyo kushishino CMC glycerol isisombululo aqueous isetyenziswa njengentlama yentlaka isiseko;ishishini lamayeza lisetyenziswa njenge-thickener kunye ne-emulsifier;Isisombululo samanzi se-CMC sisetyenziswa njengento edadayo emva kokuqina kweMigodi njalo njalo.

5. Ingasetyenziselwa i-adhesive, i-plasticizer, i-agent yokumisa i-glaze, i-agent yokulungisa umbala, njl njl kwishishini le-ceramic.

6. Isetyenziselwa ukwakha ukuphucula ukugcinwa kwamanzi kunye namandla

7. Isetyenziswa kwishishini lokutya.Ushishino lokutya lusebenzisa i-CMC eneqondo eliphezulu lokutshintshwa njenge-thickener ye-ayisikrimu, ukutya okunkonkxiweyo, ii-noodles ezikhawulezayo, kunye ne-foam stabilizer yebhiya.Kwizinto ezityebisayo, izibophelelo okanye iiarhente ezihambelanayo.

8. Ishishini lamayeza likhetha i-CMC ene-viscosity efanelekileyo njenge-binder,

i-agent edibeneyo yeepilisi, kunye ne-agent yokumisa ukumiswa, njl.