Carboxymetylcelleculose (cmc) thiab cov hmoov txhuv nplej siab yog ob qho tib si polysaccharides, tab sis lawv muaj cov qauv sib txawv, cov khoom thiab cov ntawv thov.
Molecular muaj:
1. Carboxymethylcelulose (CMC):
Carboxymethylcellose yog ib qho tseem ceeb ntawm cellulose, ib txoj kab polymer muaj cov khoom sib txuas nrog cov dej qab zib β-1,4-glycosidic. Kev hloov kho ntawm cellulose cuam tshuam nrog kev qhia ntawm Carboxymethyl pawg los ntawm ethermalation, ua carboxymethylcellcelleculose. Cov pab pawg carboxymethyl ua rau CMC dej-soluble thiab muab cov polymer sib txawv.
2. Starch:
Cov hmoov txhuv nplej siab yog carbohydrate uas muaj cov piam thaj ua ke tau sib txuas los ntawm α-1,4-glycosidic bonds. Nws yog lub ntuj huv huv cov nroj tsuag pom hauv cov nroj tsuag uas tau siv ua lub zog cia khoom sib xyaw. Cov hmoov txhuv nplej siab tseem ceeb feem ntau muaj ntawm ob hom glucose polymers: amylose (ncaj txuas) thiab amylopectin (branped saw qauv qauv).
Lub cev lub cev:
1. Carboxymethylcelulose (CMC):
Solubility: CMC yog dej-soluble vim muaj cov pawg carboxymethyl.
Viscosity: nws ua rau cov viscosity siab hauv kev daws teeb meem, ua rau nws muaj txiaj ntsig zoo xws li kev ua zaub mov noj thiab cov khoom noj.
Pob tshab: CMC daws teeb meem yog feem ntau pob tshab.
2. Starch:
Solubility: Cov hmoov txhuv nplej siab yog insoluble hauv dej. Nws yuav tsum tau gelatinization (cua sov hauv dej) kom yaj.
Viscosity: Starch muab tshuaj txhuam muaj viscosity, tab sis nws feem ntau qis dua cmc.
Transparency: hmoov txhuv nplej siab nyiam yuav tsum opaque, thiab cov degree ntawm opacity yuav sib txawv raws li hom hmoov txhuv nplej siab raws li hom hmoov txhuv nplej siab.
Tau qhov twg los:
1. Carboxymethylcelulose (CMC):
CMC feem ntau ua los ntawm cellulose los ntawm cov nroj tsuag cov zaub mov zoo li ntoo pulp lossis paj rwb.
2. Starch:
Nroj tsuag xws li pob kws, nplej, qos yaj ywm thiab mov yog nplua nuj nyob hauv cov hmoov txhuv nplej siab. Nws yog ib qho tseem ceeb hauv ntau cov zaub mov staple.
Cov Txheej Txheem Ntau Lawm:
1. Carboxymethylcelulose (CMC):
Kev tsim cov CMC cuam tshuam rau lub etherification cov tshuaj tiv thaiv ntawm cellulose ntawm cellulose ntawm chloroacetic acid nyob rau hauv ib qho nruab nrab alkaline. Qhov kev tshwm sim no ua rau hloov cov pab pawg hydroxyl hauv cellulose nrog pawg carboxymethyl.
2. Starch:
Starch extraction cuam tshuam nrog tawg cia cog cov hlwb thiab cais cov hmoov txhuv nplej siab granules. Extracted Starch tuaj yeem tsim ntau cov txheej txheem, suav nrog kev hloov kho thiab gelatinization, kom tau txais cov khoom xav tau.
Cawmseej thiab thov:
1. Carboxymethylcelulose (CMC):
Kev Lag Luam Khoom Noj: CMC yog siv los ua cov tuab, stabilizer thiab emulsifier hauv ntau yam khoom noj.
Kws muag tshuaj: Vim nws txoj kev khi thiab disintegrating cov khoom, nws pom siv hauv cov tshuaj yeeb yaj kiab.
Roj Drilling: CMC yog siv rau hauv cov roj drilling kua los tswj rhineology.
2. Starch:
Cov khoom noj khoom haus kev lag luam: Cov hmoov txhuv nplej siab yog qhov tseem ceeb ntawm ntau cov zaub mov thiab siv los ua cov neeg sawv cev ua kom tuab thiab muaj stabilizer thiab stabilizer.
Textile kev lag luam: Cov hmoov txhuv nplej siab yog siv rau hauv textile sizing kom muab cov tawv ncauj rau cov ntaub.
Kev lag luam ntawv: Cov ntawv Starch yog siv hauv papermaking kom nce daim ntawv lub zog thiab txhim kho cov khoom saum npoo av.
Txawm hais tias cmc thiab hmoov txhuv nplej siab yog ob qho tib si polysaccharides, lawv muaj kev sib txawv, cov khoom siv lub cev, cov peev txheej, cov txheej txheem ntau lawm, cov txheej txheem ntau lawm thiab cov ntawv thov. CMC yog dej-soluble thiab heev viscous thiab feem ntau nyiam hauv cov ntawv thov, thaum cov hmoov txhuv nplej siab siv hauv cov zaub mov, textile thiab ntawv lag luam. Nkag siab cov kev sib txawv no yog qhov tseem ceeb rau xaiv cov polymer tsim nyog rau kev lag luam tshwj xeeb thiab cov ntawv thov ua lag luam.
Lub Sijhawm Post: Jan-12-2024