The thickening zotsatira za mapadi efa zimadalira: mlingo wa polymerization wa mapadi efa, njira ndende, kukameta ubweya mlingo, kutentha ndi zina.Katundu wa gelling wa yankho ndi katundu wa alkyl cellulose ndi zotuluka zake zosinthidwa.Makhalidwe a gelation amakhudzana ndi kuchuluka kwa m'malo, ndende ya yankho ndi zowonjezera.Kwa zotumphukira zosinthidwa za hydroxyalkyl, mawonekedwe a gel amalumikizananso ndi digiri yosinthidwa ya hydroxyalkyl.Pakuti otsika mamasukidwe akayendedwe MC ndi HPMC, 10% -15% yankho akhoza kukonzekera, sing'anga mamasukidwe akayendedwe MC ndi HPMC akhoza kukonzekera 5% -10% yankho, pamene mkulu mamasukidwe akayendedwe MC ndi HPMC akhoza kukonzekera 2% -3% yankho, ndipo Kawirikawiri Gulu la mamasukidwe a cellulose ether limayikidwanso ndi 1% -2% yankho.
High molecular kulemera cellulose ether ali mkulu thickening dzuwa.Munjira yofananira, ma polima okhala ndi zolemetsa zosiyanasiyana zama cell amakhala ndi ma viscosity osiyanasiyana.Madigiri apamwamba.Chandamale mamasukidwe akayendedwe angapezeke kokha ndi kuwonjezera kuchuluka otsika maselo kulemera cellulose ether.Kukhuthala kwake kumadalira pang'ono kumeta ubweya wa ubweya, ndipo kukhuthala kwapamwamba kumafika kukhuthala kwa chandamale, ndipo kuchuluka komwe kumafunikira kumakhala kochepa, ndipo kukhuthala kumadalira kukhuthala kwamphamvu.Choncho, kuti akwaniritse kusasinthasintha kwina, kuchuluka kwa cellulose ether (kukhazikika kwa yankho) ndi kukhuthala kwa njira ziyenera kutsimikiziridwa.Kutentha kwa gel osakaniza kumachepetsanso mofanana ndi kuwonjezeka kwa ndende ya yankho, ndi gel osakaniza kutentha kwa firiji atatha kufika pamtundu wina.The gelling ndende ya HPMC ndi mkulu kutentha firiji.
Kusasinthasintha kungasinthidwenso posankha kukula kwa tinthu ndikusankha ma cellulose ethers ndi magawo osiyanasiyana akusintha.Zomwe zimatchedwa kusinthidwa ndikuyambitsa njira ina yosinthira magulu a hydroxyalkyl pamapangidwe a mafupa a MC.Posintha zikhalidwe zolowa m'malo mwazolowa m'malo awiriwo, ndiye kuti, DS ndi ms zosinthana ndi magulu a methoxy ndi hydroxyalkyl omwe timanena nthawi zambiri.Zofunikira zosiyanasiyana zogwirira ntchito za cellulose ether zitha kupezeka posintha kusintha kwazinthu ziwirizo.
Ubale pakati pa kusasinthasintha ndi kusinthidwa: kuwonjezeredwa kwa cellulose ether kumakhudza kumwa madzi kwa matope, kusintha madzi-binder chiŵerengero cha madzi ndi simenti ndi thickening zotsatira, apamwamba mlingo, kwambiri kumwa madzi.
Ma cellulose ethers omwe amagwiritsidwa ntchito muzomangamanga za ufa ayenera kusungunuka mwachangu m'madzi ozizira ndikupereka kusasinthika koyenera kwa dongosolo.Ngati atapatsidwa kumeta ubweya wina, amakhalabe wopindika komanso wamtundu wa colloidal, womwe ndi chinthu chotsikirapo kapena chosawoneka bwino.
Palinso ubale wabwino wa mzere pakati pa kusasinthika kwa phala la simenti ndi mlingo wa cellulose ether.Selulosi ether akhoza kwambiri kuonjezera mamasukidwe akayendedwe a matope.Mlingo waukulu kwambiri, zotsatira zake zimakhala zoonekeratu.High-viscosity cellulose ether amadzimadzi njira ali mkulu thixotropy, amenenso ndi khalidwe lalikulu la mapadi ether.Amadzimadzi njira za MC ma polima zambiri pseudoplastic ndi sanali thixotropic fluidity m'munsimu awo gel osakaniza kutentha, koma Newtonian otaya katundu pa otsika kukameta ubweya mitengo.Pseudoplasticity imawonjezeka ndi kulemera kwa maselo kapena kuchuluka kwa cellulose ether, mosasamala kanthu za mtundu wa cholowa m'malo ndi kuchuluka kwa m'malo.Choncho, ma cellulose ethers a kalasi yofanana ya viscosity, mosasamala kanthu za MC, HPMC, HEMC, nthawi zonse amawonetsa zofanana za rheological malinga ngati ndende ndi kutentha zimasungidwa nthawi zonse.
Ma gels apangidwe amapangidwa pamene kutentha kumakwera, ndipo kutuluka kwa thixotropic kwambiri kumachitika.Mkulu ndende ndi otsika mamasukidwe akayendedwe mapadi ethers amasonyeza thixotropy ngakhale pansi pa kutentha gel osakaniza.Katunduyu ndiwopindulitsa kwambiri pakuwongolera kusanja ndi kugwa pakupanga matope omangira.Payenera kufotokozedwa apa kuti kukwezeka kwa kukhuthala kwa cellulose ether kumapangitsa kuti madzi asungidwe bwino, koma kukhuthala kwamphamvu, kumapangitsanso kuchuluka kwa maselo a cellulose ether, komanso kutsika kofananira ndi kusungunuka kwake, komwe kumakhala ndi zotsatira zoyipa. pa ndende yamatope ndi ntchito yomanga.The apamwamba mamasukidwe akayendedwe, zoonekeratu kwambiri thickening zotsatira pa matope, koma si kwathunthu molingana.Kukhuthala kwina kwapakatikati ndi kotsika, koma ether yosinthidwa ya cellulose imakhala ndi magwiridwe antchito abwino pakuwongolera mphamvu zamapangidwe amatope onyowa.Ndi kuwonjezeka kwa mamasukidwe akayendedwe, kasungidwe kamadzi ka cellulose ether kumapita bwino.
Nthawi yotumiza: Feb-16-2023