Ngoku kukho iimarike ezingakumbi nangakumbi ze-hydroxypropyl carboxymethyl cellulose kwaye amaxabiso awalingani, indlela yokujonga ngokulula nangokukhawuleza umgangatho we-hydroxypropyl carboxymethyl cellulose ibe ngumba obalulekileyo!Ke ungagweba njani umgangatho we-hydroxypropyl methylcellulose?Into yokuqala yokujonga ubumhlophe be-hydroxypropyl cellulose;nangona ubumhlophe bungenako ukugqiba ukuba ngaba i-HPMC ikulungele ukusetyenziswa, abanye abavelisi abangathembekanga baya kongeza i-arhente emhlophe ngexesha lokucubungula, eliya kuchaphazela umgangatho walo.Kodwa xa sithetha ngokubanzi, uninzi lwee-ether ze-cellulose ezigqwesileyo zinobumhlophe obungcono.
Okwesibini, kuxhomekeke kwi-fineness ye-hydroxypropyl methylcellulose: ubukhulu be-particle ye-hydroxypropyl carboxymethyl cellulose yi-80-100 mesh, ngaphantsi kwe-120 mesh, kunye ne-hydroxyethyl cellulose HECHPMC malunga ne-100 mesh.Uninzi lwe-hpmc yi-60-80 mesh.Ngokubanzi, okukhona i-methyl cellulose ithambile, kokukhona ukusasazwa ngcono.
Ukucaca kwe-cellulose ether kwisisombululo: faka i-HPMC emanzini ukuvelisa isisombululo se-colloidal esicacileyo, ukucaca okuphezulu, ukucaca okuphezulu, ukuthoba izinto ezinganyibilikiyo.
Xa imveliso ifudunyezwa, ijiyile okanye idike kwaye inyibilike.I-hydrophobic kwaye iyanyibilika.Ikhonkrithi yeyona nto iphambili yokudibanisa kunye nokususa imathiriyeli ekrwada yomgubo onganyangekiyo ngamanzi.Umgaqo wokumelana namanzi ngolu hlobo lulandelayo: xa i-latex powder kunye ne-samente edibeneyo ixutywe namanzi, i-latex powder iya kuqhubeka ibuyela kwifom ye-emulsion yasekuqaleni, kwaye iinqununu ze-latex Zisasaza ngokulinganayo kwi-sement slurry.Emva kokuba isamente idibana namanzi, i-hydration reaction iqala, kwaye isisombululo se-Ca (OH) i-2 sifikelela kwi-saturation kunye ne-crystals iyancipha.Ngexesha elifanayo, iikristali ze-ettringite kunye ne-calcium silicate hydrate colloids zenziwe, kwaye iinqununu ze-latex zifakwe kwi-gel kunye neengqungquthela ze-samente ezingenamanzi, njengoko i-hydration reaction iqhubeka, iimveliso ze-hydration ziyaqhubeka zikhula, kwaye i-latex particles ngokuthe ngcembe. qokelela kwi-voids yezinto ezingaphiliyo ezifana nesamente, kwaye wenze umaleko opakishwe ngokuxineneyo kumphezulu wejeli yesamente., ngenxa yokunciphisa ngokuthe ngcembe ukufuma okomileyo, amasuntswana e-latex aphinde apakishwe ngokusondeleyo kwijeli kunye ne-voids idibanisa ukwenza ifilimu eqhubekayo, yenza umxube kunye ne-matrix edibeneyo ye-cement paste, kwaye yenza i-cement paste kunye nezinye ii-powders. zincanyathiselwe omnye komnye.
Ixesha lokuposa: May-11-2023