1. i-hygroscopicity
ICarboxymethylcellulose sodium CMC inokufunxeka kwamanzi okufana nezinye iiglues ezinyibilikayo emanzini. Ukufuma kwayo kunyuka ngokunyuka kokufuma kwaye kuncipha ngokunyuka kwamaqondo obushushu. Okukhona iphezulu i-DS, kokukhona kunyuka ukufuma komoya, kunye nemveliso Okona kunamandla ukufunxa kwamanzi. Ukuba isikhwama sivulwa kwaye sibekwe emoyeni kunye nomxholo ophezulu wokufuma ixesha elithile, umthamo walo womswakama ungafikelela kuma-20%. Xa umthamo wamanzi u-15%, ifom ye powder yemveliso ayiyi kutshintsha. Xa umthamo wamanzi ufikelela kwi-20%, ezinye iinqununu ziya kuqokelela kwaye zinamathele omnye komnye, zinciphise umbane we powder. I-CMC iya kwandisa ubunzima emva kokufunxa ukufuma, ngoko ke ezinye iimveliso ezingapakishwanga kufuneka zibekwe kwizikhongozeli ezingangeni moya okanye zigcinwe kwindawo eyomileyo.
2. ICarboxymethyl Cellulose Sodium CMC Ichithwe
ICarboxymethylcellulose sodium CMC, njengezinye iipolymers ezinyibilikayo emanzini, ibonisa ukudumba ngaphambi kokunyibilika. Xa isixa esikhulu se-carboxymethylcellulose isisombululo se-CMC ye-sodium kufuneka silungiswe, ukuba i-particle nganye ivuvukale ngokufanayo, ngoko uMveliso uyachithwa ngokukhawuleza. Ukuba isampuli iphonswa emanzini ngokukhawuleza kwaye ibambelele kwibhloko, "iliso lentlanzi" liya kwenziwa. Oku kulandelayo kuchaza indlela yokunyibilikisa ngokukhawuleza i-CMC: ngokucothayo faka i-CMC emanzini phantsi kokuvuselela okuphakathi; I-CMC ihlakazwe kwangaphambili kunye ne-solvent enyibilikayo yamanzi (efana ne-ethanol, i-glycerin), kwaye ngokukhawuleza yongeza amanzi phantsi kokuvuselela okuphakathi; Ukuba ezinye izongezo zomgubo kufuneka zongezwe kwisisombululo, okokuqala xuba i-additives kunye ne-CMC powder, uze ungeze amanzi ukuze uchithe; ukwenzela ukuba kube lula kubasebenzisi, igranule ekhawulezileyo kunye neemveliso zomgubo ziqaliswa.
3. I-Rheology yeSodium Carboxymethyl Cellulose CMC Solution
Isisombululo se-sodium carboxymethyl cellulose CMC silulwelo olungelulo lwe-Newtonian, olubonisa i-viscosity ephantsi ngesantya esiphezulu, oko kukuthi, ngenxa yokuba ixabiso le-viscosity ye-sodium carboxymethyl cellulose CMC ixhomekeke kwiimeko zokulinganisa, ngoko "i-viscosity ebonakalayo" isetyenziselwa ukuchaza indalo.
Kuboniswe kwi-rheological curve diagram: Ubume be-non-Newtonian fluids kukuba ubudlelwane phakathi kwesantya sokucheba (isantya sokujikeleza kwi-viscometer) kunye ne-shear force (i-torque ye-viscometer) ayikho ubudlelwane bomgca, kodwa ijika.
Carboxymethyl cellulose sodium CMC isisombululo lulwelo pseudoplastic. Xa ulinganisa i-viscosity, ngokukhawuleza isantya sokujikeleza, incinci i-viscosity elinganisiweyo, ebizwa ngokuba yi-shear thinning effect.
4. Carboxymethyl Cellulose Sodium CMC Viscosity
1) I-Viscosity kunye neqondo eliphakathi lokupholisa
I-viscosity ye-sodium carboxymethylcellulose isisombululo se-CMC ikakhulu ixhomekeke kumyinge we-polymerization yamatyathanga e-cellulose eyenza isakhelo. Kukho unxulumano olumalunga nomgca phakathi kwe-viscosity kunye neqondo eliphakathi lepolymerization.
2) I-Viscosity kunye nokugxininiswa
Ubudlelwane phakathi kwe-viscosity kunye nokuxinana kwezinye iintlobo ze-sodium carboxymethylcellulose CMC. I-viscosity kunye nokugxininiswa kufana ne-logarithmic. Isisombululo se-sodium carboxymethyl cellulose ye-CMC sinokuvelisa i-viscosity ephezulu kwi-concentration ephantsi, olu phawu lwenza i-CMC isetyenziswe njenge-thickener egqwesileyo kwisicelo.
3) I-Viscosity kunye nobushushu
I-viscosity ye-carboxymethylcellulose ye-sodium ye-CMC yesisombululo samanzi iyancipha ngokunyuka kwamaqondo obushushu, kungakhathaliseki ukuba luhlobo luni kunye nokugxila, umkhwa we-viscosity yesisombululo kunye ne-curve yobudlelwane bobushushu ngokusisiseko kuyafana.
4) I-Viscosity kunye ne-pH
Xa i-pH i-7-9, i-viscosity yesisombululo se-CMC ifikelela kubuninzi bayo kwaye izinzile kakhulu. I-viscosity ye-sodium carboxymethylpyramid ayiyi kutshintsha kakhulu phakathi kwe-pH ye-5-10. I-CMC inyibilika ngokukhawuleza kwiimeko ze-alkaline kuneemeko ezingathathi hlangothi. Xa pH>10, oko kuya kubangela CMC ukuthotywa nokunciphisa viscosity. Xa i-asidi yongezwa kwisisombululo se-CMC, ukuzinza kwesisombululo kuyancitshiswa kuba i-H + kwisisombululo ithatha indawo ye-Na + kwi-chain chain. Kwisisombululo esinamandla se-asidi (pH = 3.0-4.0) i-semi-sol iqala ukwenza, okunciphisa i-viscosity yesisombululo. Xa i-pH<3.0, i-CMC iqala ukunganyibiliki ngokupheleleyo emanzini kwaye yenza i-CMC acid.
I-CMC eneqondo eliphezulu lokuthatha indawo yomelele kwi-asidi kunye nokumelana ne-alkali kune-CMC ene-DS ephantsi; I-CMC ene-viscosity ephantsi yomelele kwi-asidi kunye nokumelana ne-alkali kune-CMC ene-viscosity ephezulu.
Ixesha lokuposa: Jan-28-2023