Zeziphi iindlela zokunyibilikisa i-cellulose ether?

Ukunyibilikisa i-cellulose ethers kunokuba linyathelo elibalulekileyo kumashishini ahlukeneyo afana namayeza, ukutya, amalaphu, kunye nokwakha.I-cellulose etherszisetyenziswa ngokubanzi ngenxa yeempawu zazo ezinjengokuqina, ukubopha, ukwenza ifilim, kunye nokuzinzisa. Nangona kunjalo, ukunganyibiliki kwazo kwizinyibilikisi ezininzi eziqhelekileyo kunokubangela imingeni. Iindlela ezininzi ziye zaphuhliswa ukunyibilikisa i-cellulose ethers ngempumelelo.

Izinyibilikisi zeOrganic:

Utywala: I-alcohols ephantsi ye-molecular weight ezifana ne-ethanol, i-methanol, kunye ne-isopropanol inokunyibilikisa i-cellulose ethers ukuya kwinqanaba elithile. Nangona kunjalo, zisenokungalungeli zonke iintlobo ze-cellulose ethers kwaye zinokufuna amaqondo obushushu aphezulu.
Imixube ye-Ether-Alcohol: Imixube ye-diethyl ether kunye ne-ethanol okanye i-methanol isoloko isetyenziselwa ukunyibilikisa i-cellulose ethers. Ezi zinyibilikisi zibonelela ngokunyibilika kakuhle kwaye zisetyenziswa ngokuqhelekileyo kwizicwangciso zebhubhoratri.
I-Ketones: Ezinye ii-ketones ezifana ne-acetone kunye ne-methyl ethyl ketone (MEK) inokunyibilikisa iintlobo ezithile ze-cellulose ethers. I-acetone, ngokukodwa, isetyenziswa ngokubanzi ngenxa yeendleko eziphantsi kunye nokusebenza kwayo.
I-Esters: I-Esters efana ne-ethyl acetate kunye ne-butyl acetate inokunyibilikisa i-cellulose ethers ngokufanelekileyo. Nangona kunjalo, banokufuna ukufudumeza ukufezekisa ukupheliswa ngokupheleleyo.

Izisombululo zamanzi:

Izisombululo ze-Alkaline: I-cellulose ethers inokuchithwa kwisisombululo se-alkaline njenge-sodium hydroxide (NaOH) okanye i-potassium hydroxide (KOH). Ezi zisombululo zenza i-hydrolyze i-cellulose ethers ukwenza i-alkali metal salts, ezinyibilikayo.
Izisombululo ze-ammonia: Izisombululo ze-ammonia (NH3) zingasetyenziselwa ukunyibilikisa i-cellulose ethers ngokwenza i-ammonium salts ye-ether.
Izisombululo ze-Hydroxyalkyl Urea: Izisombululo ze-Hydroxyalkyl urea, ezifana ne-hydroxyethyl urea okanye i-hydroxypropyl urea, zinokunyibilikisa i-cellulose ethers ngokufanelekileyo, ngakumbi ezo zineedigri ezisezantsi zokutshintshwa.

Ulwelo lwe-Ionic:

Ulwelo lwe-ionic ziityuwa eziphilayo ezilulwelo kumaqondo obushushu asezantsi noko, amaxesha amaninzi ngaphantsi kwe-100°C. Olunye ulwelo lwe-ionic lufunyenwe lunyibilikisa i-cellulose ethers ngokufanelekileyo ngaphandle kwesidingo seemeko ezinzima. Banikezela ngeenzuzo ezifana nokuguquguquka okuphantsi, ukuzinza okuphezulu kwe-thermal, kunye nokuphinda kusetyenziswe.

Iinkqubo eziDibeneyo zokunyibilikisa:

Ukudibanisa izinyibilikisi ezahlukeneyo ngamanye amaxesha kunokonyusa ukunyibilika kwe-cellulose ethers. Ngokomzekelo, imixube yamanzi kunye ne-co-solvent efana ne-dimethyl sulfoxide (DMSO) okanye i-N-methyl-2-pyrrolidone (NMP) inokuphucula iimpawu zokuchithwa.
Ingqikelelo yeHansen Solubility Parameters idla ngokusetyenziswa ukuyila iinkqubo ezisebenzayo zokunyibilikisa ezixubeneyo zokunyibilikisa i-cellulose ethers ngokuthathela ingqalelo iiparamitha zokunyibilika kwezinyibilikisi zomntu ngamnye kunye nokusebenzisana kwazo.

Iindlela zoMzimba:

Ukuchetywa komatshini: Ukuxuba okuphezulu kwe-shear okanye i-sonication kunokuncedisa ukusabalalisa i-cellulose ethers kwi-solvents kunye nokuphucula i-kinetics ye-dissolution.
Ulawulo lobushushu: Amaqondo obushushu anyusiweyo angonyusa ukunyibilika kwe-cellulose ethers kwizinyibilikisi ezithile, kodwa kufuneka kuthathelwe ingqalelo ukunqanda ukuthotywa kwepolymer.

Ukuguqulwa kwemichiza:

Kwezinye iimeko, ukuguqulwa kweekhemikhali ze-cellulose ethers kunokuphucula iimpawu zabo zokunyibilika. Ngokomzekelo, ukwazisa amaqela e-hydrophobic okanye ukwandisa iqondo lokutshintshwa kunokwenza i-cellulose ethers inyibilike ngakumbi kwizinyibilikisi ze-organic.

Izisombululo zeMicellar:

Ii-surfactants zinokwenza iimicelles kwisisombululo, ezinokunyibilikai-cellulose ethers. Ngokulungelelanisa i-surfactant concentration kunye neemeko zesisombululo, kuyenzeka ukunyibilikisa i-cellulose ethers ngempumelelo.
Ukuqukumbela, ukhetho lwendlela yokunyibilikisa i-cellulose ethers ixhomekeke kwizinto ezifana nodidi lwe-cellulose ether, ukunyibilika okunqwenelekayo, ukuqwalaselwa kokusingqongileyo, kunye nosetyenziso olucetywayo. Indlela nganye ineengenelo kunye nemida yayo, kwaye abaphandi bayaqhubeka nokuphonononga iindlela ezintsha zokuphucula ukunyibilika kwe-cellulose ethers kwizinyibilikisi ezahlukeneyo.