ʻO ka cellulose ether, ʻo ka hydroxypropyl methylcellulose (HPMC), he mea hoʻohui koʻikoʻi i hoʻohana ʻia i nā ʻoihana like ʻole no kāna hana mānoanoa kiʻekiʻe, paʻa wai kiʻekiʻe, a me ka hiki ke hoʻonui i ka viscosity. Ma kēia ʻatikala, e ʻimi mākou i kahi loiloi piha o ka mānoanoa a me nā waiwai thixotropy o cellulose ether, e pili ana i ka HPMC.
ʻO ka mānoanoa kahi waiwai nui o ka cellulose ether, e pili ana i ka hiki o kahi mea ke hoʻonui i ka viscosity o kahi hopena a i ʻole ka hoʻopuehu. Hōʻike ka HPMC i ka hana mānoanoa kiʻekiʻe, ʻo ia ka mea hiki ke hoʻonui nui i ka viscosity ʻoiai ma nā haʻahaʻa haʻahaʻa. Makemake nui ʻia kēia waiwai i nā noi he nui, e like me nā adhesives, coatings, a me nā huahana mālama pilikino, kahi e koi ʻia ai kahi viscosity kiʻekiʻe no ka hana ʻoi aku ka maikaʻi.
ʻO kekahi o nā pōmaikaʻi nui o HPMC ʻo ia ka nui o ka mālama wai. ʻO ka paʻa ʻana o ka wai e pili ana i ka hiki o kahi mea ke mālama i ka wai i loko o kahi ʻōnaehana, ʻoiai ma lalo o nā wela kiʻekiʻe a i ʻole ke alo o nā mea hoʻoheheʻe ʻē aʻe. Hoʻokumu ʻo HPMC i kahi ʻano gel-like i ka wā e hoʻomaʻemaʻe ʻia, e kōkua ana i ka mālama ʻana i nā molekole wai a pale i ka evaporation nui. He mea koʻikoʻi kēia waiwai i nā ʻoihana e like me ke kūkulu ʻana a me ka mortar hui maloʻo, kahi e mālama ai i ka ʻike wai he mea koʻikoʻi no ka hydration kūpono a me ka mālama ʻana i nā mea.
ʻO ka nui o ka viscosity i hāʻawi ʻia e cellulose ether, e like me HPMC, hāʻawi i nā pono he nui i nā noi like ʻole. I ka ʻoihana kūkulu, hoʻohana ʻia ʻo HPMC i nā ʻano hana sima e hoʻomaikaʻi i ka hana a pale i ka hoʻokaʻawale ʻana. ʻO ka viscosity kiʻekiʻe o ka hoʻonā HPMC e hiki ai ke hoʻomalu maikaʻi i ka wā o ka noi, e hōʻoia i ka laha like ʻole a pale aku i ka hoʻonohonoho ʻana o nā ʻāpana. Pēlā nō, i ka ʻoihana pena, ua hoʻohui ʻia ka HPMC i nā uhi e hoʻonui ai i ko lākou viscosity, e hopena i ka uhi ʻoi aku ka maikaʻi a me ka hoʻohaʻahaʻa ʻana.
Eia kekahi, ʻo ke ʻano thixotropic o cellulose ether kahi mea nui e noʻonoʻo ai. ʻO ka Thixotropy ka waiwai o kahi mea e hōʻike ai i ka hoʻololi hou ʻana o ka viscosity i ka hoʻohana ʻana i ke koʻikoʻi shear. Ma nā ʻōlelo maʻalahi, i ka wā e hoʻohana ʻia ai ka ikaika shear, e liʻiliʻi ka liʻiliʻi o ka mea, e hiki ai ke hoʻohana maʻalahi, a ma ke kū ʻana, hoʻi ia i kona kūlana viscosity kiʻekiʻe. He mea maikaʻi loa kēia waiwai i nā noi e like me nā caulks, sealants, a me nā ʻaila lāʻau, kahi e koi ʻia ai ka maʻalahi a me ka hoʻolaha ʻana. ʻO ka hana thixotropic o HPMC e hōʻoia i ka maʻalahi o ka hoʻohana ʻana a me ka pulu maikaʻi ʻana o nā ʻili, me ka mālama ʻana i ka viscosity pono no ka adhesion a me ka hoʻopaʻa ʻana i nā waiwai.
No ka ʻimi hohonu ʻana i nā waiwai mānoanoa a me ka thixotropy o ka cellulose ether, mālama ʻia ka noiʻi nui a me ka nānā ʻana. Hoʻohana ʻia nā ʻano hana like ʻole, me nā ana rheological e loiloi i ka viscosity, shear stress, a me ka ʻano thixotropic o ka cellulose ether solutions. Ke kōkua nei kēia mau haʻawina i ka hoʻomaopopo ʻana i ka pilina ma waena o ka noʻonoʻo ʻana, ka mahana, a me ka nui o ka shear ma ka mānoanoa a me ka thixotropy waiwai o cellulose ether.
I ka hopena, ʻo ka cellulose ether, ʻo HPMC, hōʻike i ka hana mānoanoa kiʻekiʻe, ka paʻa wai kiʻekiʻe, a me ka hoʻonui ʻana i ka viscosity i nā noi like ʻole. ʻO kona hiki ke hāʻawi i ka hana thixotropic e lilo ia i mea hoʻohui waiwai no nā huahana kahi e koi ʻia ai ka noi maʻalahi a me ka viscosity kiʻekiʻe i ka manawa like. No ka loaʻa ʻana o ka ʻike piha o ka mānoanoa a me ka thixotropy waiwai o ka cellulose ether, hana ʻia ka loiloi nui a me ka noiʻi ʻana, e hoʻomaikaʻi hou ana i kāna mau noi ʻoihana.
Ka manawa hoʻouna: Nov-24-2023