I loko o ka mortar i hui mua ʻia, he haʻahaʻa loa ka nui o ka hydroxypropyl methyl cellulose HPMC, akā hiki iā ia ke hoʻomaikaʻi nui i ka hana o ka mortar pulu, ʻo ia kahi mea hoʻohui nui e hoʻopilikia i ka hana kūkulu o ka mortar. ʻO nā ethers cellulose me nā viscosity like ʻole a me ka nui i hoʻohui ʻia he hopena maikaʻi i ka hoʻomaikaʻi ʻana i ka hana o ka mortar maloʻo. I kēia manawa, he nui nā mortar masonry a me plastering he mau waiwai paʻa wai maikaʻi ʻole, a ʻo ka hoʻokaʻawale ʻana o ka slurry wai e hana ʻia ma hope o kekahi mau minuke o ke kū mālie. ʻO ka paʻa ʻana o ka wai kahi hana koʻikoʻi o ka methyl cellulose ether, a he hana nō hoʻi ia e nānā nui ʻia e nā mea hana mortar maloʻo kūloko, ʻoiai ka poʻe ma nā wahi me nā mahana kiʻekiʻe ma ka hema. ʻO nā mea e hoʻopilikia ana i ka hopena paʻa wai o ka mortar maloʻo e pili ana i ka nui o ka HPMC i hoʻohui ʻia, ka viscosity o HPMC, ka maikaʻi o nā ʻāpana a me ka mahana o ke kaiapuni kahi i hoʻohana ʻia ai.
1. Manaʻo: ʻO ka Cellulose ether kahi polymer molekala kiʻekiʻe synthetic i hana ʻia mai ka cellulose kūlohelohe ma o ka hoʻololi kemika. ʻO ka Cellulose ether kahi derivative o ka cellulose kūlohelohe. ʻOkoʻa ka hana ʻana o ka cellulose ether mai nā polymers synthetic. ʻO kāna mea kumu nui loa he cellulose, kahi hui polymer kūlohelohe. Ma muli o ke ʻano kūikawā o ka cellulose kūlohelohe, ʻaʻohe hiki o ka cellulose ponoʻī ke hana me nā mea etherifying. Akā ma hope o ka mālama ʻia ʻana o ka mea pehu, ua luku ʻia nā pilina hydrogen ikaika ma waena o nā kaulahao molekala a i loko o ke kaulahao, a lilo ka hoʻokuʻu ikaika o ka hui hydroxyl i cellulose alkali reactive. Ma hope o ka hana ʻana o ka mea etherification, ua hoʻololi ʻia ka hui -OH i ka hui -OR. Loaʻa i ka cellulose ether. ʻO ke ʻano o ka cellulose ether e pili ana i ke ʻano, ka nui a me ka hoʻolaha ʻana o nā substituents. Hoʻokumu pū ʻia ka hoʻokaʻawale ʻana o nā cellulose ethers ma nā ʻano o nā substituents, ke kiʻekiʻe o ka etherification, ka solubility a me nā noi pili. Wahi a ke ʻano o nā substituents ma ke kaulahao molekala, hiki ke hoʻokaʻawale ʻia i monoether a me ka ether hui. ʻO ka HPMC a mākou e hoʻohana pinepine ai he ether hui. ʻO ka Hydroxypropyl methyl cellulose ether HPMC kahi huahana kahi i pani ʻia ai kahi hapa o ka hui hydroxyl ma ka ʻāpana e ka hui methoxy a ʻo kekahi ʻāpana e pani ʻia e ka hui hydroxypropyl. Hoʻohana nui ʻia ka HPMC i nā mea kūkulu hale, nā uhi latex, nā lāʻau lapaʻau, nā kemika o kēlā me kēia lā, a me nā mea ʻē aʻe. Hoʻohana ʻia ma ke ʻano he mea hoʻomānoanoa, mea mālama wai, mea hoʻopaʻa, mea hoʻolaha, a me ka mea hana kiʻiʻoniʻoni.
2. Ka paʻa ʻana o ka wai o ka cellulose ether: i ka hana ʻana o nā mea kūkulu hale, ʻoi aku ka mortar maloʻo, he kuleana koʻikoʻi ka cellulose ether, ʻoi aku hoʻi i ka hana ʻana o ka mortar kūikawā (mortar i hoʻololi ʻia), he mea pono ʻole ia. ʻāpana. ʻO ke kuleana koʻikoʻi o ka cellulose ether wai-hoʻoheheʻe ʻia i loko o ka mortar ma nā ʻano ʻekolu. ʻO kekahi ka mana paʻa wai maikaʻi loa, ʻo kekahi ka mana ma ke kūlike a me ka thixotropy o ka mortar, a ʻo ke kolu ka launa pū ʻana me ka sima. ʻO ka hopena paʻa wai o ka cellulose ether e pili ana i ka omo wai o ka papa kumu, ka haku mele o ka mortar, ka mānoanoa o ka papa o ka mortar, ke koi wai o ka mortar, a me ka manawa hoʻonohonoho o ka mea coagulating. ʻO ka paʻa wai o ka cellulose ether ponoʻī mai ka solubility a me ka dehydration o ka cellulose ether ponoʻī.
ka mānoanoa a me ka thixotropy o ka cellulose ether: ʻO ka lua o ka hana o ka cellulose ether-thickening e pili ana i: ke kiʻekiʻe o ka polymerization o ka cellulose ether, ka nui o ka hopena, ka mahana a me nā kūlana ʻē aʻe. ʻO nā waiwai gelation o ka hopena he mau waiwai kū hoʻokahi o ka alkyl cellulose a me kāna mau derivatives i hoʻololi ʻia. Pili nā ʻano Gelation i ke kiʻekiʻe o ka pani ʻana, ka nui o ka hopena a me nā mea hoʻohui.
ʻO ka hiki ke paʻa wai maikaʻi e hoʻopau ai i ka hydration o ka sima, hiki ke hoʻomaikaʻi i ka pipili pulu o ka mortar pulu, hoʻonui i ka ikaika hoʻopaʻa o ka mortar, a hiki ke hoʻololi i ka manawa. ʻO ka hoʻohui ʻana o ka cellulose ether i ka mortar pīpī mechanical hiki ke hoʻomaikaʻi i ka hana pīpī a i ʻole ka pumping o ka mortar, a me ka ikaika kūkulu. No laila, hoʻohana nui ʻia ka cellulose ether ma ke ʻano he mea hoʻohui koʻikoʻi i ka mortar i hui mua ʻia.
Ka manawa hoʻouna: Dec-16-2021