Ma cellulose ethers (HEC, HPMC, MC, etc.)ndi zowonjezera ziwiri zofunika mumatope, makamaka matope osakaniza owuma. Chilichonse chimakhala ndi ntchito zapadera, ndipo kudzera mwanzeru zolumikizirana, zimakulitsa magwiridwe antchito onse amatope. Kuyanjana kwawo kumawonekera makamaka muzinthu izi:
Ma cellulose ethers amapereka malo ofunikira (kusunga madzi ndi kukhuthala):
Kusunga madzi: Ichi ndi chimodzi mwazofunikira za cellulose ether. Ikhoza kupanga filimu ya hydration pakati pa matope amatope ndi madzi, kuchepetsa kwambiri kuchuluka kwa madzi a nthunzi ku gawo lapansi (monga njerwa za porous ndi midadada) ndi mpweya.
Kukhudzika kwa ufa wa polima wotayikanso: Kusungirako madzi kwabwinoko kumapangitsa kuti pakhale mikhalidwe yofunikira kuti ufa wopangidwanso wa polima ugwire ntchito:
Kupereka nthawi yopanga filimu: tinthu tating'onoting'ono ta polima timafunika kusungunuka m'madzi ndikumwazanso mu emulsion. Polima ufa kenako amalumikizana kukhala mosalekeza, kusinthasintha polima filimu monga madzi pang'onopang'ono nthunzi mu kuyanika matope. Selulosi etha kubweza madzi evaporation, kupereka polima ufa particles nthawi yokwanira (yotseguka nthawi) kuti wogawana kumwazikana ndi kusamukira mu matope pores ndi polumikizira, potsirizira pake kupanga apamwamba, wathunthu polima filimu. Ngati kutayika kwa madzi kuli kofulumira kwambiri, ufa wa polima sudzapanga filimu yonse kapena filimuyo idzasiya, kuchepetsa kwambiri kulimbikitsa kwake.
Kuonetsetsa Kuti Simenti Imasungunuka: Kuthira kwa simenti kumafunika madzi.Makhalidwe osungira madzia cellulose ether amaonetsetsa kuti pamene ufa wa polima umapanga filimuyo, simentiyo imalandiranso madzi okwanira kuti ikhale ndi madzi okwanira, potero imapanga maziko abwino a mphamvu zoyambirira ndi mochedwa. Mphamvu yopangidwa ndi simenti ya hydration yophatikizidwa ndi kusinthasintha kwa filimu ya polima ndiyo maziko a ntchito yabwino.
Cellulose ether imathandizira kugwira ntchito (kukhuthala ndi kulowetsedwa kwa mpweya):
Thickening/Thixotropy: Ma cellulose etha amachulukitsa kwambiri kusasinthika ndi thixotropy wa matope (wokhuthala akadali, kupatulira akasonkhezeredwa/kuyikidwa). Izi zimathandizira kuti matope asagwedezeke (kutsetsereka pansi pamtunda), kupangitsa kuti ikhale yosavuta kufalikira ndi kuchuluka kwake, zomwe zimapangitsa kumaliza bwino.
Mpweya wopatsa mphamvu: Ma cellulose ether ali ndi mphamvu yolowetsa mpweya, kubweretsa tinthu ting'onoting'ono, yunifolomu komanso yokhazikika.
Zotsatira pa ufa wa polima:
Kubalalitsidwa bwino: Kukhuthala koyenera kumathandiza kuti tinthu ta ufa wa latex timene timabalalitsa kwambiri mumtondo wamatope panthawi yosakanikirana ndikuchepetsa kuphatikizika.
Wokometsedwa workability: Good zomangamanga katundu ndi thixotropy kupanga matope munali lalabala ufa mosavuta kusamalira, kuonetsetsa kuti wogawana ntchito pa gawo lapansi, zimene n'zofunika kuti mokwanira akupereka kugwirizana zotsatira za lalabala ufa pa mawonekedwe.
Kupaka mafuta ndi kufota kwa thovu la mpweya: Mivumbi ya mpweya yomwe imayambitsidwa imakhala ngati ma berela a mpira, kupititsa patsogolo kuyanika ndi kugwira ntchito kwa matope. Panthawi imodzimodziyo, ma microbubbles amalepheretsa kupanikizika mkati mwa matope owuma, zomwe zimagwirizanitsa mphamvu ya latex powder (ngakhale kuti mpweya wochuluka ukhoza kuchepetsa mphamvu, kotero kuti kulinganiza n'kofunika).
Redispersible polima ufa umapereka kulumikizana kosinthika ndi kulimbikitsa (kupanga filimu ndi kugwirizana):
Mapangidwe a filimu ya polima: Monga tanenera kale, panthawi yowumitsa matope, tinthu tating'onoting'ono ta latex timaphatikizana kukhala filimu yopitilira 3-dimensional polima network.
Zotsatira pa matrix amatope:
Kugwirizana kowonjezera: Mafilimu a polima amakulunga ndi milatho ya simenti ya hydration, tinthu tating'ono ta simenti topanda madzi, zodzaza ndi zophatikizira, zomwe zimakulitsa kwambiri mphamvu yomangira (kugwirizana) pakati pa zigawo zomwe zili mumatope.
Kusinthasintha kosinthika komanso kukana kwa ming'alu: Kanema wa polima ndi wosinthika mwachibadwa komanso wodumphira, zomwe zimapangitsa kuti matope owuma awonongeke kwambiri. Izi zimathandiza kuti matope azitha kuyamwa bwino ndikugawa kupsinjika komwe kumachitika chifukwa cha kusintha kwa kutentha, kusintha kwa chinyezi, kapena kusamuka pang'ono kwa gawo lapansi, kuchepetsa kwambiri chiopsezo chosweka (kukana kusweka).
Kupititsa patsogolo kukana komanso kukana kuvala: Kanema wosinthika wa polima amatha kuyamwa mphamvu ndikuwongolera kukana kwake komanso kukana kwamatope.
Kutsitsa zotanuka modulus: kupangitsa matope kukhala ofewa komanso osinthika kuti asinthe gawo lapansi.
Latex ufa umathandizira kulumikizana kwapakati (kuwonjezera mawonekedwe):
Kuonjezera gawo logwira ntchito la ma cellulose ethers: Mphamvu yosungira madzi ya cellulose ethers imachepetsanso vuto la "kusowa kwa madzi kwapakati" komwe kumachitika chifukwa cha kuyamwa kwamadzi kochulukirapo ndi gawo lapansi. Chofunika kwambiri, tinthu tating'onoting'ono ta polima / emulsions zimakhala ndi chizolowezi chosamukira ku mawonekedwe a matope-substrate ndi mawonekedwe a matope owonjezera (ngati alipo).
Kupanga mawonekedwe amphamvu: Kanema wa polima wopangidwa pamawonekedwe amalowera mwamphamvu ndikumangirira ma micropores a gawo lapansi (kulumikizana kwathupi). Panthawi imodzimodziyo, polima mwiniwakeyo amawonetsera bwino kwambiri (mankhwala / thupi adsorption) kumagulu osiyanasiyana (konkire, njerwa, matabwa, EPS / XPS matabwa otsekemera, etc.). Izi kwambiri kumawonjezera matope chomangira mphamvu (kumatira) kwa magawo osiyanasiyana, poyambirira komanso pambuyo pa kumizidwa m'madzi ndi kuzizira kozungulira (kukana madzi ndi kukana nyengo).
Kukhathamiritsa kwa ma pore ndi kukhazikika kwa synergistic:
Zotsatira za cellulose ether: Kusungidwa kwa madzi kumapangitsa kuti simenti ikhale yabwino komanso imachepetsa ma pores otayirira chifukwa cha kusowa kwa madzi; mpweya etraining zotsatira kumayambitsa kulamulirika ting'onoting'ono pores.
Zotsatira za ufa wa polima: Nembanemba ya polima imatsekereza pang'ono kapena kumangirira pores, zomwe zimapangitsa kuti pore ikhale yaying'ono komanso yolumikizidwa.
Synergistic Effect: Kuphatikizika kwa zinthu ziwirizi kumapangitsa kuti matope apangidwe bwino, amachepetsa kuyamwa kwamadzi ndikuwonjezera kusakwanira kwake. Izi sizimangowonjezera kulimba kwa matope (kukana kuzizira kwamadzi komanso kukana dzimbiri mchere), komanso kumachepetsa mwayi wa efflorescence chifukwa cha kuchepa kwa mayamwidwe amadzi. Kapangidwe ka pore kameneka kamalumikizidwanso ndi mphamvu zapamwamba.
Ma cellulose ether ndi "foundation" ndi "guarantee": amapereka malo osungira madzi ofunikira (othandizira simenti ya simenti ndi mapangidwe a filimu ya latex powder), amawongolera kugwira ntchito (kuonetsetsa kuti matope amaikidwa), ndipo amakhudza microstructure kupyolera mu makulidwe ndi kulowetsa mpweya.
Redispersible latex powder ndi "zowonjezera" ndi "mlatho": zimapanga filimu ya polima pansi pamikhalidwe yabwino yopangidwa ndi cellulose ether, kumapangitsanso mgwirizano wa matope, kusinthasintha, kukana ming'alu, mphamvu zomangira, ndi kulimba.
Core synergy: Mphamvu yosungira madzi ya cellulose ether ndiyofunikira kuti filimu ipangidwe bwino ya ufa wa latex. Popanda kusungirako madzi okwanira, ufa wa latex sungathe kugwira ntchito mokwanira. Mosiyana ndi zimenezi, kugwirizana kosinthika kwa ufa wa latex kumathetsa kuphulika, kusweka, ndi kusamamatira kokwanira kwa zinthu zopangira simenti, zomwe zimapangitsa kuti zikhale zolimba.
Zotsatira zophatikizana: Awiriwa amathandizirana pakuwongolera kapangidwe ka pore, kuchepetsa kuyamwa kwamadzi, komanso kukulitsa kukhazikika kwanthawi yayitali, zomwe zimapangitsa kuti pakhale mgwirizano. Choncho, mumatope amakono (monga zomatira matailosi, pulasitala wakunja / zomangira zomangira, matope odzipangira okha, matope osalowa madzi, ndi matope okongoletsera), ma cellulose ethers ndi redispersible polima ufa nthawi zambiri amagwiritsidwa ntchito awiriawiri. Posintha ndendende mtundu ndi mlingo wa chilichonse, zinthu zamatope zapamwamba zitha kupangidwa kuti zikwaniritse zofunikira zosiyanasiyana. Kugwirizana kwawo ndi chinsinsi chokwezera matope achikhalidwe kukhala ma composites a simenti opangidwa ndi polima apamwamba kwambiri.
Nthawi yotumiza: Aug-06-2025