1. hygroscopicity
Carboxymethylcellulose sodium CMC imakhala ndi mayamwidwe amadzi ofanana ndi zomatira zina zosungunuka m'madzi. Kuchuluka kwake kwa chinyezi kumawonjezeka ndi kuwonjezeka kwa chinyezi ndikuchepa ndi kuwonjezeka kwa kutentha. Kukwera kwa DS m'pamenenso kumakhala chinyezi cha mpweya, ndipo chinthucho chimakhala champhamvu kwambiri m'madzi. Ngati thumba latsegulidwa ndikuyikidwa mumlengalenga ndi chinyezi chambiri kwa nthawi yayitali, chinyezi chake chimatha kufika 20%. Pamene madzi ali ndi 15%, mawonekedwe a ufa wa mankhwalawa sangasinthe. Madzi akafika 20%, tinthu tating'onoting'ono timadziunjikira ndikumatirana, ndikuchepetsa kutulutsa kwa ufa. CMC idzawonjezeka kulemera pambuyo poyamwa chinyezi, kotero zinthu zina zosapakidwa ziyenera kuikidwa m'mitsuko yopanda mpweya kapena kusungidwa pamalo ouma.
2. Carboxymethyl cellulose Sodium CMC Kusungunuka
Carboxymethylcellulose sodium CMC, monga ma polima ena osungunuka m'madzi, amawonetsa kutupa asanasungunuke. Pamene kuchuluka kwa carboxymethylcellulose sodium CMC solution iyenera kukonzekera, ngati tinthu tating'onoting'ono tatupa mofanana, ndiye kuti Mankhwalawa amasungunuka mwamsanga. Ngati chitsanzocho chikuponyedwa m'madzi mofulumira ndikumamatira ku chipika, "diso la nsomba" lidzapangidwa. Zotsatirazi zikufotokozera njira yosungunulira CMC mwachangu: pang'onopang'ono ikani CMC m'madzi mogwedezeka pang'ono; CMC imamwazikana kale ndi zosungunulira zosungunuka m'madzi (monga ethanol, glycerin), ndiyeno pang'onopang'ono onjezerani madzi otakasuka pang'ono; Ngati zowonjezera zowonjezera zowonjezera ziyenera kuwonjezeredwa ku yankho, choyamba sakanizani zowonjezera ndi ufa wa CMC, kenaka yikani madzi kuti musungunuke; kuti ogwiritsa ntchito athe kugwiritsa ntchito, granule pompopompo ndi zinthu zaposachedwa za ufa zimayambitsidwa.
3. Rheology ya Sodium Carboxymethyl Cellulose CMC Solution
Sodium carboxymethyl cellulose CMC yankho ndi sanali Newtonian madzimadzi, amene amasonyeza otsika mamasukidwe akayendedwe pa liwiro lapamwamba, ndiye kuti, chifukwa mamasukidwe akayendedwe phindu la sodium carboxymethyl mapadi CMC zimadalira miyeso mikhalidwe, kotero "kukhuthala koonekera" ntchito kufotokoza ake. chilengedwe.
Kuwonetsedwa pa chithunzi cha rheological curve: Chikhalidwe cha madzi osakhala a Newtonian ndikuti mgwirizano pakati pa kumeta ubweya wa ubweya (liwiro lozungulira pa viscometer) ndi mphamvu ya shear (torque ya viscometer) si mgwirizano wa mzere, koma wopindika.
Carboxymethyl cellulose sodium CMC solution ndi pseudoplastic fluid. Pamene kuyeza mamasukidwe akayendedwe, mofulumira kasinthasintha liwiro, ang'onoang'ono kuyeza mamasukidwe akayendedwe, amene amatchedwa kukameta ubweya kupatulira kwenikweni.
4. Carboxymethyl Cellulose Sodium CMC Viscosity
1) Viscosity ndi pafupifupi digiri ya polymerization
Kukhuthala kwa sodium carboxymethylcellulose CMC solution makamaka kumadalira kuchuluka kwa ma polymerization a maunyolo a cellulose omwe amapanga chimango. Pali pafupifupi liniya ubale pakati mamasukidwe akayendedwe ndi pafupifupi digiri ya polymerization.
2) Viscosity ndi ndende
Ubale pakati pa mamasukidwe akayendedwe ndi kuchuluka kwa mitundu ina ya sodium carboxymethylcellulose CMC. Viscosity ndi ndende zimakhala pafupifupi logarithmic. Sodium carboxymethyl cellulose CMC yankho likhoza kutulutsa mamasukidwe apamwamba kwambiri pamagulu otsika, izi zimapangitsa CMC kugwiritsidwa ntchito ngati thickener kwambiri pakugwiritsa ntchito.
3) Viscosity ndi kutentha
The mamasukidwe akayendedwe a carboxymethylcellulose sodium CMC amadzimadzi njira amachepetsa ndi kuwonjezeka kutentha, mosasamala mtundu ndi ndende, mchitidwe wa yankho mamasukidwe akayendedwe ndi kutentha ubale pamapindikira ndi chimodzimodzi.
4) Viscosity ndi pH
Pamene pH ndi 7-9, kukhuthala kwa njira ya CMC kumafika pazipita zake ndipo kumakhala kokhazikika. Kukhuthala kwa sodium carboxymethylpyramid sikungasinthe kwambiri mkati mwa pH ya 5-10. CMC imasungunuka mwachangu m'malo amchere kuposa m'malo osalowerera ndale. Pamene pH> 10, izo zidzachititsa CMC kunyozetsa ndi kuchepetsa mamasukidwe akayendedwe. Pamene asidi akuwonjezeredwa ku yankho la CMC, kukhazikika kwa yankho kumachepetsedwa chifukwa H + mu njira yothetsera Na + pazitsulo za maselo. Mu njira yamphamvu ya asidi (pH = 3.0-4.0) theka-sol imayamba kupanga, zomwe zimachepetsa kukhuthala kwa yankho. Pamene pH <3.0, CMC imayamba kusungunuka kwathunthu m'madzi ndikupanga CMC acid.
CMC yokhala ndi digiri yapamwamba yoloweza m'malo imakhala yolimba mu asidi ndi kukana zamchere kuposa CMC yokhala ndi DS yochepa; CMC yokhala ndi mamasukidwe otsika ndi yamphamvu mu asidi ndi kukana zamchere kuposa CMC yokhala ndi kukhuthala kwakukulu.
Nthawi yotumiza: Jan-28-2023