Yintoni iSodium carboxymethylcellulose?

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 kwi-organic solvents efana 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. Isetyenziselwa ukugaya ioli kunye negesi yendalo, 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 kwi-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 ezisemthethweni.

8. Ishishini lamachiza likhetha i-CMC ene-viscosity efanelekileyo njenge-binder, i-agent edibeneyo yeepilisi, kunye ne-arhente yokumisa ukumiswa, njl.