Ke hoʻoholo nei i ka maikaʻi o ka hydroxypropyl methylcellulose

I kēia manawa, ʻoi aku ka nui o nā mākeke no ka hydroxypropyl carboxymethyl cellulose a ʻaʻole like nā kumukūʻai, pehea e hoʻoholo maʻalahi ai a wikiwiki i ka maikaʻi o ka hydroxypropyl carboxymethyl cellulose ua lilo i mea koʻikoʻi! No laila pehea e hoʻoholo ai i ka maikaʻi o ka hydroxypropyl methylcellulose? ʻO ka mea mua e nānā ai, ʻo ia ke keʻokeʻo o ka hydroxypropyl cellulose; ʻoiai ʻaʻole hiki i ka keʻokeʻo ke hoʻoholo inā kūpono ka HPMC no ka hoʻohana ʻana, e hoʻohui kekahi mau mea hana pono ʻole i kahi mea hoʻokeʻokeʻo i ka wā e hana ai, kahi e hoʻopilikia ai i kona maikaʻi. Akā ma ke ʻano laulā, ʻoi aku ka maikaʻi o ka keʻokeʻo o ka hapa nui o nā ethers cellulose maikaʻi loa.

ʻO ka lua, hilinaʻi ia i ka maikaʻi o ka hydroxypropyl methylcellulose: ʻo ka nui o ka ʻāpana o ka hydroxypropyl carboxymethyl cellulose he 80-100 mesh, ʻoi aku ka liʻiliʻi ma mua o 120 mesh, a ʻo ka hydroxyethyl cellulose HECHPMC ma kahi o 100 mesh. ʻO ka hapa nui o ka hpmc he 60-80 mesh. Ma keʻano laulā, ʻo ka palupalu o ka methyl cellulose, ʻoi aku ka maikaʻi o ka hoʻopuehu ʻana.

ʻO ka mōakāka o ka cellulose ether i loko o ka hopena: e hoʻokomo i ka HPMC i loko o ka wai e hana i kahi hopena colloidal moakaka, ʻo ke kiʻekiʻe o ka mōakāka, ʻo ke kiʻekiʻe o ka mōakāka, ʻo ka haʻahaʻa o nā mea hiki ʻole ke hoʻoheheʻe ʻia.

Ke hoʻomehana ʻia ka waiwai, hoʻopili a hoʻopaʻa paha a laila heheʻe. He hydrophobic a hiki ke hoʻoheheʻe ʻia. ʻO ka sima ke kumu nui o ka hoʻopaʻa ʻana a me ka demulsifying maka no ka pauka putty wai-pale. ʻO ke kumumanaʻo o ke kūpaʻa wai penei: ke hui pū ʻia ka pauka latex redispersible a me ka sima me ka wai, e hoʻomau ka pauka latex e hoʻi i ke ʻano emulsion mua, a hoʻopuehu like nā ʻāpana latex i loko o ka slurry sima. Ma hope o ka hālāwai ʻana o ka sima me ka wai, hoʻomaka ka hopena hydration, a hiki i ka hopena Ca(OH)2 i ka saturation a hoʻopūʻiwa ʻia nā kristal. I ka manawa like, hoʻokumu ʻia nā kristal ettringite a me nā colloids calcium silicate hydrate, a waiho ʻia nā ʻāpana latex ma luna o ka gel a me nā ʻāpana sima i hoʻomaʻū ʻole ʻia, i ka wā e hoʻomau ai ka hopena hydration, hoʻomau ka hoʻonui ʻana o nā huahana hydration, a hōʻuluʻulu mālie nā ʻāpana latex i loko o nā hakahaka o nā mea inorganic e like me ka sima, a hana i kahi papa i hoʻopaʻa nui ʻia ma luna o ka gel sima. , ma muli o ka emi mālie ʻana o ka makū maloʻo, ua hui pū nā ʻāpana latex i hoʻopili hou ʻia i loko o ka gel a me nā voids e hana i kahi kiʻiʻoniʻoni hoʻomau, e hana ana i kahi hui me ka matrix interpenetrating o ka paʻi sima, a hana i ka paʻi sima a me nā pauka ʻē aʻe. Hoʻopili ʻia nā aggregates kekahi i kekahi.