Ndeupi hukama pakati peDS uye molecular huremu hweSodium CMC

Sodium carboxymethyl cellulose (CMC) imhando yepolymer inonyungudika mumvura inotorwa kubva ku cellulose, polysaccharide inowanzoitika inowanikwa mumadziro esero rezvirimwa. Inoshandiswa zvakanyanya mumaindasitiri akasiyana siyana, anosanganisira chikafu, mishonga, zvizorwa, machira, uye kuchera mafuta, nekuda kweiyo yakasarudzika zvimiro uye kushanda kwayo.

Chimiro uye Zvivakwa zveSodium CMC:

CMC inogadzirwa nekemikari shanduko ye cellulose, umo carboxymethyl mapoka (-CH2-COOH) anounzwa pane cellulose musana kuburikidza ne etherification kana esterification maitiro. Iyo dhigirii yekutsiva (DS) inoreva huwandu hweavhareji yemapoka ecarboxymethyl paglucose unit mucheni ye cellulose. Huwandu hweDS hunowanzo tangira pa0.2 kusvika 1.5, zvichienderana nemamiriro ekubatanidza uye zvimiro zvinodiwa zveCMC.

Huremu hwemamorekuru eCMC inoreva avhareji saizi yemacheni epolymer uye inogona kusiyanisa zvakanyanya zvichienderana nezvinhu zvakaita sekunobva cellulose, synthesis nzira, maitiro ekuita, uye nzira dzekuchenesa. Huremu hwemamorekuru hunowanzo ratidzwa nezvikamu zvakadai senhamba-avhareji yehuremu (Mn), uremu-avhareji yehuremu hwemamorekuru (Mw), uye viscosity-average molecular weight (Mv).

Synthesis yeSodium CMC:

Iyo synthesis yeCMC inowanzo sanganisira maitiro e cellulose ine sodium hydroxide (NaOH) uye chloroacetic acid (ClCH2COOH) kana yayo sodium munyu (NaClCH2COOH). Mhedzisiro yacho inoenderera kuburikidza neiyo nucleophilic substitution, uko hydroxyl mapoka (-OH) pa cellulose musana anoita ne chloroacetyl mapoka (-ClCH2COOH) kuumba carboxymethyl mapoka (-CH2-COOH).

Iyo DS yeCMC inogona kudzorwa nekugadzirisa iyo molar chiyero che chloroacetic acid kune cellulose, kuita nguva, tembiricha, pH, uye mamwe ma parameter panguva yekubatanidza. Yepamusoro DS tsika dzinowanzo kuwanikwa nehupamhi hwepamusoro hwe chloroacetic acid uye nguva refu yekuita.

Huremu hwemamorekuru eCMC hunopesvedzerwa nezvinhu zvakasiyana, zvinosanganisira kugovanisa huremu hwemamorekuru ekutanga cellulose zvinhu, kuwanda kwekuora panguva yekubatanidza, uye dhigirii repolymerization yeCMC maketani. Yakasiyana nzira dzekubatanidza uye maitiro ekuita zvinogona kukonzera CMC nekusiyana kwema molecular uremu kugoverwa uye avhareji saizi.

Hukama Pakati peDS uye Molecular Weight:

Hukama huri pakati pedhigirii rekutsiva (DS) uye huremu hwemamorekuru e sodium carboxymethyl cellulose (CMC) yakaoma uye inokanganiswa nezvakawanda zvinhu zvine chekuita neCMC synthesis, chimiro, uye zvivakwa.

1. Mhedzisiro yeDS paMolecular Weight:
   • Hwaro hweDS hwepamusoro hunowanzoenderana nemaremu akaderera eCMC. Izvi zvinodaro nekuti huwandu hweDS hwepamusoro hunoratidza huwandu hukuru hwekutsiviwa kwemapoka ecarboxymethyl kumusana we cellulose, zvichitungamira kumacheni mapfupi epolymer uye kudzika kwema molecular uremu paavhareji.
   • Kuunzwa kwemapoka e-carboxymethyl kunovhiringidza iyo intermolecular hydrogen bonding pakati pecheni dze cellulose, zvichikonzera kutsika kweketani uye kupatsanurwa panguva yekubatanidza. Iyi nzira yekudzikisira inogona kutungamira mukudzikiswa kwehuremu hweCMC, kunyanya pamhando yepamusoro yeDS uye maitiro akawedzera.
   • Sezvineiwo, yakaderera DS kukosha kwakabatana nehurefu hwepolymer cheni uye yakakwirira mamorekuru uremu paavhareji. Izvi zvinodaro nekuti madhigirii akaderera ekutsiva anokonzeresa mashoma emapoka e-carboxymethyl paglucose unit, zvichibvumira kuti zvikamu zvirefu zvemacheni asina kugadziriswa cellulose arambe akasimba.
2. Mhedzisiro yeMolecular Weight paDS:
   • Huremu hwemamorekuru eCMC hunogona kupesvedzera dhigirii rekutsiva rinowanikwa panguva yekubatanidza. Huremu hwemamorekuru hweselulosi hunogona kupa mamwe masaiti anoshanda kune carboxymethylation reactions, zvichibvumira kuti dhigirii repamusoro rekutsiva riwanikwe mune mamwe mamiriro.
   • Nekudaro, kurema kwakanyanya kwemamorekuru ecellulose kunogona kukanganisawo kuwanikwa kwemapoka ehydroxyl kuti atsive maitiro, zvichitungamira kune isina kukwana kana kusashanda carboxymethylation uye yakaderera DS kukosha.
   • Pamusoro pezvo, kugovera huremu hwemamorekuru kwekutanga cellulose zvinhu kunogona kukanganisa kugoverwa kweDS kukosha mune inoguma CMC chigadzirwa. Heterogeneities muhuremu hwemamorekuru inogona kukonzera mutsauko mukuita zvakare uye kutsiva kushanda zvakanaka panguva yekubatanidza, zvichitungamira kune yakafara siyana yeDS kukosha mune yekupedzisira CMC chigadzirwa.

Mhedzisiro yeDS uye Molecular Weight pane CMC Properties uye Zvishandiso:

1. Rheological Properties:
   • Iyo dhigirii yekutsiva (DS) uye huremu hwemamorekuru eCMC inogona kukanganisa rheological zvimiro, kusanganisira viscosity, shear kuonda maitiro, uye kuumbwa kwegel.
   • Hunhu hwepamusoro hweDS hunowanzo konzera kudzikira viscosity uye kuwedzera pseudoplastic (shear thinning) hunhu nekuda kweipfupi polymer cheni uye kuderedzwa kwema molecular entanglement.
   • Sezvineiwo, yakaderera DS kukosha uye epamusoro mamorekuru uremu anowanzo kuwedzera viscosity uye kuwedzera pseudoplastic maitiro eCMC mhinduro, zvichitungamira mukuvandudza kukora uye kumiswa zvivakwa.
2. Kunyungudika kwemvura uye kuzvimba maitiro:
   • CMC ine yakakwira DS kukosha inotaridza kunyungudika kukuru kwemvura uye nekukurumidza hydration mitengo nekuda kwekukwira kwepamusoro kwemapoka ehydrophilic carboxymethyl pamwe nemacheni epolymer.
   • Nekudaro, yakawandisa yakakwira DS kukosha kunogona zvakare kukonzera kuderedzwa kwemvura kunyungudika uye kuwedzera gel kuumbwa, kunyanya pakukwirira kwakanyanya kana pamberi peakawanda cations.
   • Huremu hwemamorekuru hweCMC hunogona kukanganisa maitiro ekuzvimba uye kuchengetedza mvura. Huremu hwemamorekuru hwepamusoro hunowanzo konzeresa kunonoka kwe hydration uye huwandu hwekuchengetedza mvura, izvo zvinogona kubatsira mumashandisirwo anoda kuburitswa kwakasimba kana kudzora mwando.
3. Mafirimu-Kuumba uye Zvipingamupinyi Zvivakwa:
   • Mafirimu eCMC akaumbwa kubva mumhinduro kana dispersions anoratidza zvipingamupinyi zvinopokana neokisijeni, unyoro, uye mamwe magasi, zvichiita kuti ive yakakodzera kurongedza uye kuvhara maapplication.
   • Iyo DS uye huremu hwemamorekuru eCMC inogona kukanganisa simba remuchina, kuchinjika, uye kugona kwemafirimu anozobuda. Yepamusoro DS kukosha uye yakaderera mamorekuru uremu anogona kutungamira kumafirimu ane kushomeka kwesimba uye yakakwirira permeability nekuda kwekupfupika kwepolymer cheni uye kuderedzwa kwekudyidzana kweintermolecular.
4. Zvishandiso muMaindasitiri Akasiyana:
   • CMC ine huremu hwakasiyana hweDS uye huremu hwemamorekuru inowana mashandisirwo mumaindasitiri akasiyana, anosanganisira chikafu, mishonga yemishonga, zvekuzora, machira, uye kuchera mafuta.
   • Muindasitiri yechikafu, CMC inoshandiswa seyakakora, inosimbisa, uye emulsifier mune zvigadzirwa zvakaita sesosi, madhirezi, uye zvinwiwa. Sarudzo yegiredhi reCMC inotsamira pane inodiwa manyorerwo, muromo, uye kugadzikana zvinodiwa zvechigadzirwa chekupedzisira.
   • Mukugadzirwa kwemishonga, CMC inoshanda sebhainda, disintegrant, uye firimu-inogadzira mumiriri mumapiritsi, makapisi, uye nemuromo kumiswa. Iyo DS uye huremu hwemamorekuru eCMC inogona kukanganisa kuburitsa zvinodhaka kinetics, bioavailability, uye kutevedzera kwemurwere.
   • Muindasitiri yezvizoro, CMC inoshandiswa mumakirimu, mafuta ekuzora, uye zvigadzirwa zvekuchengeta bvudzi seyakakora, inosimbisa, uye moisturizer. Sarudzo yegiredhi reCMC inoenderana nezvinhu zvakaita semanyorerwo, kupararira, uye hunhu hwekunzwa.
   • Muindasitiri yekuchera oiri, CMC inoshandiswa mukuchera zvinwiwa seviscosifier, fluid kurasikirwa control agent, uye shale inhibitor. Iyo DS uye huremu hwemamorekuru eCMC inogona kukanganisa kushanda kwayo mukuchengetedza kugadzikana kwetsime, kudzora kurasikirwa kwemvura, uye kudzivirira kuzvimba kwevhu.

Mhedziso:

Hukama huri pakati pedhigirii rekutsiva (DS) uye huremu hwemamorekuru e sodium carboxymethyl cellulose (CMC) yakaoma uye inokanganiswa nezvakawanda zvinhu zvine chekuita neCMC synthesis, chimiro, uye zvivakwa. Hwaro hweDS hwepamusoro hunowanzoenderana nemaremu akaderera eCMC, ukuwo huremu hweDS hwakaderera uye huremu hwepamusoro hwemamorekuru hunowanzoita kuti pave nehuremu hwepolymer uye huremu hwepamusoro hwemamorekuru paavhareji. Kunzwisisa hukama uhwu kwakakosha pakugadzirisa zvivakwa uye kuita kweCMC mumashandisirwo akasiyana siyana mumaindasitiri, kusanganisira chikafu, mishonga, zvekuzora, machira, uye kuchera mafuta. Kumwe kutsvagisa nekusimudzira kuedza kunodiwa kujekesa ari pasi pematanho uye kukwidziridza synthesis uye hunhu hweCMC ine yakarongedzerwa DS uye molecular huremu kugovera kune chaiwo maapplication.