Isibophelelo seCellulose—Carboxymethyl Cellulose (CMC)

Carboxymethyl Cellulose (Iselulosi yeSodium Carboxymethyl), ekubhekiselwa kuyo njengeCMC, yikhompawundi yepolymer yecolloid esebenzayo. Ayinavumba, incasa, iphuma kwi-cellulose enyibilikayo emanzini. Isibophelelo se-organic cellulose esifunyenwe luhlobo lwe-cellulose ether, kwaye ityuwa yayo yesodium isetyenziswa ngokubanzi, ke igama layo elipheleleyo kufuneka libe yi-sodium carboxymethyl cellulose, oko kukuthi, i-CMC-Na. 

Njenge-methyl cellulose, i-carboxymethyl cellulose inokusetyenziswa njenge-surfactant yezixhobo eziphikisayo kunye nesibophelelo sexeshana sezinto eziphikisayo.

I-sodium carboxymethyl cellulose yi-polyelectrolyte yokwenziwa, ngoko inokusetyenziswa njenge-dispersant kunye ne-stabilizer yodaka oluphikisayo kunye nezinto ezichithwayo, kwaye ikwayi-binder ye-organic high-efficiency yethutyana. Inezi ncedo zilandelayo:

1. I-Carboxymethyl cellulose inokubhengezwa kakuhle kumphezulu weengqungquthela, ingene kakuhle kwaye idibaniswe kwiinqununu, ukwenzela ukuba i-refractory blanks ephezulu inokuveliswa;

2. Ekubeni i-carboxymethyl cellulose i-anionic polymer electrolyte, inokunciphisa ukusebenzisana phakathi kweengqungquthela emva kokubhengezwa kwi-particle surface, kwaye isebenze njenge-dispersant kunye ne-colloid ekhuselayo, ngaloo ndlela iphucula ubuninzi kunye namandla emveliso kunye nokunciphisa i-Inhomogeneity emva kokutshisa. ubume bombutho;

3. Ukusebenzisa i-carboxymethyl cellulose njenge-binder, akukho mlotha emva kokutshisa, kwaye kukho izinto ezimbalwa ezincibilikayo eziphantsi, ezingayi kuchaphazela ukushisa kwenkonzo yemveliso.

Iimpawu zeMveliso:

1. I-CMC inomgubo omhlophe okanye otyheli we-fibrous granular, ayinancasa, ayinavumba, ayinatyhefu, inyibilika ngokulula emanzini, kwaye yenza i-colloid viscous ebonakalayo, kwaye isisombululo singathathi hlangothi okanye sinealkaline kancinane. Iyakwazi ukugcinwa ixesha elide ngaphandle kokuwohloka, kwaye izinzile phantsi kobushushu obuphantsi kunye nokukhanya kwelanga. Nangona kunjalo, ngenxa yokutshintsha ngokukhawuleza kweqondo lokushisa, i-acidity kunye ne-alkalinity yesisombululo iya kutshintsha. Ngaphantsi kweempembelelo zemitha ye-ultraviolet kunye ne-microorganisms, iya kubangela i-hydrolysis okanye i-oxidation, i-viscosity yesisombululo iya kuncipha, kwaye isisombululo siya konakala. Ukuba isisombululo kufuneka sigcinwe ixesha elide, i-preservatives efanelekileyo ingakhethwa, njenge-formaldehyde, i-phenol, i-benzoic acid, kunye ne-organic mercury compounds.

2. CMC iyafana nezinye electrolytes polymer. Xa ichithwa, iya kuqala ihlume, kwaye iinqununu ziya kubambelela omnye komnye ukuze zenze ifilimu okanye iqela le-viscose, ukwenzela ukuba bangakwazi ukuchithwa, kodwa ukuchithwa kucotha. Ngoko ke, xa ulungiselela isisombululo saso samanzi, ukuba iinqununu zinokuthi zifakwe ngokulinganayo kuqala, izinga lokuchithwa linokunyuswa kakhulu.

3. I-CMC ine-hygroscopic. Umyinge wokufuma kwe-CMC kwi-atmosfera uyenyuka ngokunyuka kobushushu bomoya kwaye wehla ngokunyuka kobushushu bomoya. Xa iqondo lokushisa eliphakathi kwegumbi liyi-80% -50%, ukufuma okulinganayo kungaphezulu kwe-26%, kunye nokufuma kwemveliso ngaphantsi kwe-10%. Ke ngoko, ukupakishwa kwemveliso kunye nokugcinwa kufuneka kuthathelwe ingqalelo kubungqina bokufuma.

4. Iityuwa zetsimbi ezinzima ezifana ne-zinc, ubhedu, ilothe, i-aluminiyam, isilivere, isinyithi, i-tin, i-chromium, njl., zingabangela imvula kwisisombululo samanzi se-CMC, kwaye imvula isengaphinda inyibilike kwi-sodium hydroxide okanye i-ammonium hydroxide solution. ngaphandle kwesiseko seacetate yelothe .

5. I-Organic okanye i-acids ye-inorganic nayo iya kubangela imvula kwisisombululo sale mveliso. I-precipitation phenomenon ihluke ngenxa yohlobo kunye nokugxilwa kwe-asidi. Ngokuqhelekileyo, imvula ivela ngaphantsi kwe-pH 2.5, kwaye inokuphinda ihlaziywe emva kokungathathi hlangothi ngokongeza i-alkali.

6. Iityuwa ezifana ne-calcium, i-magnesium kunye netyuwa yetafile ayinayo i-precipitation effect kwisisombululo se-CMC, kodwa ichaphazela ukunciphisa i-viscosity.

7. I-CMC iyahambelana nezinye iiglues ezinyibilikayo zamanzi, izinto ezithambileyo kunye ne-resins.

8. Ifilimu ezotywe yiCMC intywiliselwa kwi-acetone, benzene, butyl acetate, carbon tetrachloride, castor oil, corn oil, ethanol, ether, dichloroethane, petroleum, methanol, methyl acetate, methyl ethyl ether kwiqondo lobushushu begumbi Ketone, toluene, turpentine. , i-xylene, i-peanut oil, njl njl. ayinakutshintsha kwiiyure ezingama-24.