Mumatope okonzeka okonzeka, kuchuluka kwa hydroxypropyl methyl cellulose HPMC kumakhala kochepa kwambiri, koma kungathe kupititsa patsogolo ntchito ya matope osungunuka, omwe ndi chowonjezera chachikulu chomwe chimakhudza ntchito yomanga matope.Ma cellulose ether okhala ndi kukhuthala kosiyanasiyana komanso kuchuluka kowonjezera amakhala ndi zotsatira zabwino pakuwongolera magwiridwe antchito amatope owuma.Pakali pano, matope ambiri omanga ndi pulasitala ali ndi katundu wosasunga madzi bwino, ndipo kupatukana kwa madzi slurry kumachitika pakangopita mphindi zochepa.Kusungirako madzi ndi ntchito yofunika kwambiri ya methyl cellulose ether, komanso ndikuchitanso komwe ambiri opanga matope owuma m'nyumba, makamaka omwe ali m'malo okhala ndi kutentha kwambiri kum'mwera, amalabadira.Zomwe zimakhudza momwe madzi amasungiramo matope owuma akuphatikizapo kuchuluka kwa HPMC yowonjezeredwa, kukhuthala kwa HPMC, ubwino wa tinthu tating'ono komanso kutentha kwa chilengedwe chomwe chimagwiritsidwa ntchito.
1. Lingaliro: Ma cellulose ether ndi polymer yopangidwa kuchokera ku cellulose yachilengedwe kudzera mukusintha kwamankhwala.Cellulose ether ndi chochokera ku cellulose yachilengedwe.Kupanga kwa cellulose ether ndikosiyana ndi ma polima opangira.Zinthu zake zofunika kwambiri ndi cellulose, gulu lachilengedwe la polima.Chifukwa cha kapangidwe kapadera ka cellulose yachilengedwe, mapadi samatha kuchitapo kanthu ndi etherifying agents.Koma mankhwala otupa atatha, zomangira zamphamvu za haidrojeni pakati pa unyolo wa maselo ndi mkati mwa unyolo zimawonongeka, ndipo kumasulidwa kwa gulu la hydroxyl kumasanduka zotakataka za cellulose.Wothandizira etherification akachitapo kanthu, gulu la -OH limasinthidwa kukhala -OR gulu.Pezani cellulose ether.Chikhalidwe cha cellulose ether chimadalira mtundu, kuchuluka ndi kugawa kwa zolowa m'malo.Kugawika kwa ma cellulose ethers kumatengeranso mitundu ya zolowa m'malo, digiri ya etherification, solubility ndi ntchito zofananira.Malinga ndi mtundu wa zolowa m'malo pa unyolo wa maselo, zitha kugawidwa mu monoether ndi ether wosakanikirana.HPMC yomwe timagwiritsa ntchito nthawi zambiri ndi ether yosakanikirana.Hydroxypropyl methyl cellulose ether HPMC ndi chinthu chomwe gawo la gulu la hydroxyl pa unit limasinthidwa ndi gulu la methoxy ndipo gawo lina limasinthidwa ndi gulu la hydroxypropyl.HPMC imagwiritsidwa ntchito makamaka muzomangamanga, zokutira za latex, mankhwala, chemistry ya tsiku ndi tsiku, etc. Ntchito ngati thickener, madzi kusunga wothandizira, stabilizer, dispersant, ndi filimu kupanga wothandizira.
2.Kusungidwa kwamadzi a cellulose ether: popanga zida zomangira, makamaka matope owuma, ether ya cellulose imagwira ntchito yosasinthika, makamaka popanga matope apadera (matope osinthidwa), ndikofunikira kwambiri.gawo.Ntchito yofunikira ya ether yosungunuka m'madzi ya cellulose mumatope imakhala ndi mbali zitatu.Mmodzi ndi wabwino kwambiri madzi posungira mphamvu, wina ndi chikoka pa kugwirizana ndi thixotropy matope, ndipo chachitatu ndi mogwirizana ndi simenti.Mphamvu yosungira madzi ya cellulose ether imatengera kuyamwa kwamadzi kwa gawo loyambira, kapangidwe ka matope, makulidwe a matope, kuchuluka kwa madzi amatope, komanso nthawi yokhazikika ya chinthucho.Kusungidwa kwamadzi kwa cellulose ether yokha kumachokera ku kusungunuka ndi kutaya madzi kwa cellulose ether yokha.
The thickening ndi thixotropy wa mapadi efa: Gawo lachiwiri la mapadi etere-thickening zimadalira: mlingo wa polymerization wa mapadi efa, njira ndende, kutentha ndi zina.Ma gelation a yankho ndi apadera a alkyl cellulose ndi zotuluka zake zosinthidwa.Makhalidwe a gelation amakhudzana ndi kuchuluka kwa m'malo, ndende ya yankho ndi zowonjezera.
Mphamvu yabwino yosungira madzi imapangitsa kuti simenti ikhale yokwanira, imatha kupititsa patsogolo kunyowa kwamatope, kuonjezera mphamvu yomangirira yamatope, ndipo nthawi ikhoza kusinthidwa.Kuwonjezera pa cellulose ether kuti makina kupopera matope matope akhoza kusintha kupopera mbewu mankhwalawa kapena kupopera ntchito ya matope, komanso structural mphamvu.Chifukwa chake, ether ya cellulose ikugwiritsidwa ntchito kwambiri ngati chowonjezera chofunikira mumatope osakaniza okonzeka.
Nthawi yotumiza: Dec-16-2021